Husqvarna Brush Cutter SG13 968999353 User Manual

Operator’s Manual  
Models:  
SG13A/CE/968999239  
SG13/968999353  
MANUAL NO. 539109280 REV. 03 (12/01/05)  
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TABLE OF CONTENTS  
Stump Grinder SG13A  
Introduction ................................................ 4  
Maintenance ............................................... 31  
Maintenance Schedule ........................... 31  
Cleaning the Cyclone Filter .................... 32  
Replacing the Air Filter............................ 33  
Cleaning the Sludge Reservoir ............... 34  
IdleAdjustment ....................................... 34  
Ignition System ....................................... 35  
Adjusting the Drive Belt .......................... 36  
Disassembling & Reassembling  
the Blade, Pockets & Teeth .................... 37  
Removing & Refitting the Wheels .......... 38  
Adjusting the Brake................................. 38  
Two Minute Rule ..................................... 39  
Cleaning & Washing ............................... 39  
Lubrication ................................................. 40  
Lubrication Schedule .............................. 40  
Lubricating the Cables............................ 42  
Troubleshooting ........................................ 43  
Storage ....................................................... 45  
Winter Storage ....................................... 45  
Service ................................................... 45  
Technical Data............................................ 46  
Wiring Diagram ........................................... 47  
Service Journal....................................... 48  
Delivery Service ..................................... 48  
After the First 20 Hours .......................... 48  
Congratulations ..................................... 4  
Use ........................................................ 4  
Insure your machine .............................. 4  
Good service ......................................... 4  
Serial number ........................................ 4  
Symbols and decals ................................... 5  
Location of decals.................................. 6  
Translation of instructions...................... 6  
Safety instructions..................................... 7  
General use ........................................... 7  
Controls ................................................. 9  
Operation ............................................... 10  
Movement/Transport .............................. 11  
Storage .................................................. 11  
Children ................................................. 11  
Fuel System .......................................... 12  
Maintenance .......................................... 13  
Protective Equipment ............................... 14  
Personal Equipment .............................. 14  
Set-Up ......................................................... 15  
Equipment set-up .................................. 15  
Controls ...................................................... 18  
Presentation .......................................... 18  
Main Components and  
Operating Instructions ........................... 18  
Engine ................................................... 19  
Cutting Unit ............................................ 22  
Operation.................................................... 24  
Starting the Engine................................. 24  
Normal Shutdown .................................. 26  
Shutdown in Emergency Situations....... 26  
Before You Start..................................... 27  
Using Your Stump Grinder ..................... 28  
Operating on Hills .................................. 30  
Transport ............................................... 30  
3
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INTRODUCTION  
Congratulations  
Thank you for purchasing a Husqvarna stump grinder. Through your confidence in us, you have  
chosen an exceptionally high quality product.  
This manual is a valuable document. It describes your new Husqvarna machine. Read the manual  
carefully before attempting to use the machine. Following the instructions (use, service, mainte-  
nance, etc.) can considerably increase the life-span of your machine and even increase its resale  
value. Please contact your dealer for more information.  
If you sell your Husqvarna machine, make sure to give the operator’s manual to the new owner.  
Use  
The stump grinder is used to remove tree stumps. By moving the blade in sweeping movements  
laterally over the top and front of the stump, you can gradually grind it away. Read the chapter  
“Safety instructions” before you use the machine for the first time.  
Insure your machine  
Contact your insurance company to check on insurance coverage for your new machine. You  
should have all-inclusive insurance for liability, fire, damage and theft.  
Good service  
Husqvarna products are sold all over the world and only in specialized retail trade with complete  
service. This ensures that you as a customer receive only the best support and service. Before the  
machine was delivered it underwent inspection and was adjusted by your dealer. When you need  
spare parts or support in service questions, guarantee issues, etc., please consult the following  
professional:  
This Operator’s Manual belongs to machine with  
serial number:  
Engine number:  
Serial number  
The serial number can be found on the printed plate attached to the frame in front of engine. The  
plate includes the following information:  
The machine’s type designation (MODEL).  
The machine’s serial number (S/N).  
Please state the type designation and serial number when ordering spare parts.  
The engine’s serial number is punched in the crankcase under the oil level guard.  
The engine type is specified on the crankcase to the right of the oil level guard but also appears on  
the decal on the starter.  
Please state these when ordering spare engine parts.  
4
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SYMBOLS AND DECALS  
IMPORTANTINFORMATION  
WARNING!  
Xxxx xxx xxxx xx xxxx x xxxx.  
Xxxx xxx xxxx xx xxxx x xxxx.  
Used in this publication to notify the reader of a risk  
of material damage, particularly if the reader DOES  
NOT follow the instructions given in the manual.  
Used also when there is a potential for misuse or  
misassembly.  
Used in this publication to notify the reader of a risk  
of personal injury, particularly if the reader DOES  
NOT follow the instructions given in the manual.  
Decals and machine-bound instructions  
6
10  
5
9
8
7
11  
3
4
2
1
12  
Decals that are missing or illegible should be re-  
placed before using the machine.  
1. Husqvarna logo  
7. Model designation SG13A  
2. Husqvarna logo  
8. Engine switch on the handle  
9. Throttle  
3. General precautions  
4. Exhaust warnings  
10. Handle adjustment  
11. No step  
5. Use ear and eye protection  
6. DANGER risk for injury from cutter blade  
12. Sound power  
5
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SYMBOLS AND DECALS  
Location of decals  
9
12  
5
3
8
10  
4
11  
7
2
6
1
Decal 4  
Warning  
Translation of instructions  
Decal 3  
Engine exhaust, some of its constituents and cer-  
tain vehicle components contain or emit chemicals  
considered by the Sate of California to cause can-  
cer, birth defects or other reproductive harm. The  
engine emits carbon monoxide, which is a color-  
less, poisonous gas. DO NOT use the machine in  
enclosed spaces.  
Important information  
Read and make sure you understand the  
Operator’s Manual before use or maintenance.  
To obtain a replacement manual, please contact  
your dealer.  
Decal 5  
Observe all safety instructions; otherwise you may  
injure yourself or others around you.  
Wear goggles or safety glasses and ear protec-  
tions when using the unit.  
Decal 6  
Make sure that the machine is in serviceable con-  
dition prior to use.  
There is DANGER to your feet from the cutting  
blades.  
Stop the engine and wait until all machine move-  
ment comes to a standstill before service, adjust-  
ment or cleaning.  
Decal 8  
O = off, I = on  
Decal 9  
Rabbit = Fast engage clutch.  
Turtle = Slow disengage clutch.  
Do not run the engine in poorly ventilated spaces.  
Make sure nobody is in the vicinity of the machine  
before starting and during use.  
Decal 10  
Handle adjustment.  
Decal 11  
No step.  
Avoid slopes that are too steep to use the ma-  
chine safely.  
Decal 12  
Sound power rating.  
Clear any debris prior to use.  
6
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SAFETY INSTRUCTIONS  
General use  
The object of this manual is to help you use your  
Husqvarna machine safely and to give you  
information about how to maintain your machine.  
Please read the manual carefully before attempting  
to use the machine.  
WARNING!  
Under no circumstances may the original  
design of the machine be modified  
without written approval from the  
manufacturer. Such modifications not  
only affect the performance and  
durability of the machine but may even  
pose a safety risk for users and those in  
the vicinity. Unauthorized modifications  
to the design of the machine may  
absolve the manufacturer from liability  
for any resulting personal injury or  
property damage. Modifying the machine  
without written approval from the  
manufacturer may void the guarantee.  
If after reading the operator’s manual you are still  
unsure about the safety risks associated with use  
of the machine, you should not use the machine.  
Please contact your dealer for more information.  
These safety instructions only address the basics  
for safe use. It would be impossible in the safety  
instructions to describe all possible risk situations  
that could arise when using the machine. You can,  
however, prevent accidents by always using  
common sense.  
To obtain extra copies of the operator’s manual,  
please contact your dealer.  
IMPORTANT INFORMATION  
Do not use the machine until you have  
read the operator’s manual carefully and  
understand the instructions given. All  
maintenance work or adjustments not  
described in this manual must be  
performed by an authorized Husqvarna  
service workshop.  
WARNING!  
The stump grinder can be dangerous if  
used improperly or with out due care and  
can lead to serious accidents, in the  
worst cases even fatal accidents. It is  
very important that you read this  
operator’s manual and understand the  
instructions before you attempt to use  
the machine.  
Read this manual carefully and make sure you  
understand it before using the machine or  
performing any maintenance. If the user cannot  
read this manual, it is the responsibility of the  
machine owner to explain the contents to the  
user.  
8011-208chg  
Read this manual carefully before starting the machine.  
7
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SAFETY INSTRUCTIONS  
Follow all safety instructions. Failure to do so  
may result in injury to yourself or others.  
WARNING!  
Accident prevention regulations, other general  
safety regulations, occupational safety rules  
and traffic regulations must be followed without  
fail.  
The engine can become very hot. To  
avoid being burned, you must turn off the  
engine and wait until all parts have  
cooled before touching the engine.  
All users shall be trained in use of the machine.  
The owner is responsible for training users.  
Engage an authorized Husqvarna workshop  
for all service and repairs not described in this  
manual.  
WARNING!  
Husqvarna original spare parts are designed  
and specified to maintain high quality and  
correct fit for optimal durability and life-span.  
From a safety point of view, you should only  
use Husqvarna original spare parts.  
Overexposure to vibration may lead to  
circulatory or nerve damage, particularly  
in people who have impaired circulation.  
Contact your doctor if you experience  
symptoms that could have been caused  
by overexposure to vibration. Examples  
of common symptoms include numbness,  
pain, muscle weakness, change of skin  
color or an uncomfortable feeling of  
tingling. These symptoms appear most  
frequently in the fingers, hands or wrists.  
Learn how to use the machine and its controls  
safely and learn to recognize the safety decals.  
Only use the machine for removing tree stumps.  
It is not intended for any other use.  
Check that the machine is in serviceable  
condition prior to use; see the chapter  
”Maintenance/Maintenance schedule”.  
Only use the machine in daylight or in other well-  
lit conditions. Keep the machine a safe distance  
from holes or other irregularities in the ground.  
Pay attention to other possible risks.  
Only allow the machine to be used by adults  
who are familiar with its use.  
IMPORTANT INFORMATION  
Never use a stump grinder that is  
damaged or incorrectly adjusted. Never  
use the stump grinder if any component  
is missing or if it is not properly  
assembled. Check that the cutting tools  
stop rotating when you reduce the throttle.  
If you find yourself in a situation where you  
are not sure what to do, always seek  
expert assistance. DO NOT try to attack  
any problem you are not qualified to  
resolve.  
Never allow children or persons not trained in  
the use of the machine to use or service it.  
Local laws may regulate the age of the user.  
People and animals can distract you causing  
you to lose control of the machine. For this  
reason, you should always concentrate and  
focus on the task at hand.  
Never leave the machine unsupervised with the  
engine running.  
Make sure that other people are nearby when  
you are using the machine so that you can call  
for help should an emergency arise.  
The machine is tested and approved only with  
the equipment originally provided or  
recommended by the manufacturer.  
8
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SAFETY INSTRUCTIONS  
Preparations  
Make sure that you always have first aid  
equipment at hand when using the machine.  
Make sure nobody else is in the vicinity of the  
machine when you start the engine, engage the  
drive or run the machine.  
Make sure animals and people maintain a safe  
distance from the machine.  
8011-198  
Clear the work area before beginning work.  
Clear the area of objects such as stones, toys,  
steel wire, etc. that could become caught in  
moving machine parts and thrown out.  
Find and locate all fixed objects in the ground,  
such as sprinkler systems, poles, water valves,  
bases for washing lines, etc. Be certain to  
check for hidden electrical cables or similar in  
the surface of the lawn.Always run the machine  
around these objects. Never intentionally run  
the machine over foreign objects.  
Check that the dead man’s grip and all guards  
are fitted and functioning. DO NOT use the  
machine if it is not working properly.  
Makes sure no clothing, long hair or jewelry can  
catch in moving machine parts.  
Check that all safety decals are in place. See  
the chapter “Location of decals”.  
Use mouth protection, protective gloves with  
good grip and protective clothing which you can  
move unrestricted. Also use leg protection to  
protect your legs from sparks and the cutting  
tools.  
8011-189  
Use appropriate equipment.  
Never use the machine when barefoot. Always  
wear protective shoes or protective boots with  
anti-slip and preferably with steel toes.  
WARNING!  
Always use approved protective clothing  
and approved protective equipment when  
using the machine. Protective clothing and  
protective equipment cannot eliminate  
the risk of accidents, but wearing proper  
clothing and the correct equipment will  
reduce the degree of injury should an  
accident occur. Ask your dealer about  
approved protective clothing and  
Use a helmet with a full face visor or a mesh  
visor and protective glasses. Wear approved  
ear-protection when running the machine. Ask  
your dealer about approved protective glasses,  
ear protection and recommended helmets.  
approved  
protective  
equipment  
recommended by Husqvarna.  
9
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SAFETY INSTRUCTIONS  
Operating  
DO NOT use the machine on grades of more  
than 10°.  
DO NOT use the machine if you are tired, if  
you have consumed alcohol, or if you are taking  
other drugs or medication that can affect your  
vision, judgment or coordination.  
Never use the machine indoors or in spaces  
lacking proper ventilation.  
Make sure you have a proper foothold when  
using the machine, particularly when backing.  
Walk, don’t run. Never work on wet grass. Poor  
traction may cause you to slip.  
8011-209chg  
The engine exhaust is poisonous. Never run the engine indoors.  
Keep your hands and feet away from moving  
parts.  
Keep your hands and feet away from the work  
tools.  
DO NOT use your feet or other parts of your  
body to gain greater bearing pressure against  
the stump.  
Smoking, open flames or sparks in the vicinity  
of the machine are strictly forbidden. Gasoline  
is extremely flammable and carelessness in  
handling can result in personal injury or fire.  
Never use a machine with a defective muffler.  
In very warm and dry climates, stump grinder  
operation poses a risk of forest fires.  
8011-091  
Make sure you keep your hands and feet away from moving  
parts.  
Stop and inspect the equipment if you run over  
or into anything. If necessary, make repairs  
before beginning again.  
Whatever happens, you should always park the  
machine on even ground, disengage the drive,  
activate the parking, turn off the engine and wait  
until all moving parts have stopped before  
leaving the operating position behind the  
machine.  
8011-291chg  
Smoking near the machine is strictly prohibited.  
WARNING!  
Engine exhaust, some of its constituents and certain vehicle components contain or emit  
chemicals considered to cause cancer, birth defects or other reproductive harm. The  
engine emits carbon monoxide, which is a colorless, poisonous gas. Do not use the  
machine in enclosed spaces.  
10  
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SAFETY INSTRUCTIONS  
Movement/Transport  
To turn and steer the machine, press down on  
the handle and turn on the back wheels.  
Turn off the engine and allow it to cool at least 2  
minutes before transport.  
Collapse the handle if the machine is equipped  
with a collapsible handle.  
Be careful and use safe lifting and moving  
techniques when loading/unloading the  
machine.  
We recommend having two people to lift the  
machine.  
8011-278chg  
We recommend having two people lift the machine.  
Activate the parking brake during transport.  
Fasten the machine properly in place with  
approved fasteners, such as tension belts,  
chains or rope. Always check that you are in  
compliance with applicable traffic regulations  
before transporting the machine.  
Storage  
Allow the engine to cool before storing the  
machine. Never store the machine near a open  
flame.  
Store the machine with the fuel valve closed.  
Store the machine and fuel in such a way that  
there is no risk that leaking fuel or fumes can  
come in contact with flames or sparks from  
electrical machines, electric engines, relays,  
switches, boilers or similar.  
8011-207chg  
Store the machine in a locked space away from  
children and adults untrained in use of the  
machine.  
Keep children away from the machine.  
Children  
Serious accidents can occur if you fail to be on  
guard for children in the vicinity of the machine.  
Never assume that children will stay put where you  
last saw them.  
Keep children away from the machine.  
Keep children away from the work area and  
under close supervision by another adult.  
Keep an eye out and shut off the machine if  
children enter the work area.  
Never allow children to operate the machine.  
8011-206chg  
Be particularly careful near corners, bushes,  
trees or other objects that block your view.  
Never allow children to operate the machine.  
11  
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SAFETY INSTRUCTIONS  
Fuel system  
WARNING!  
Gasoline and gasoline fumes are  
poisonous and extremely flammable.  
Be especially careful when handling  
gasoline, as carelessness can result  
in personal injury or fire.  
Only store fuel in containers approved for that  
purpose.  
Never remove the fuel cap and fill the fuel tank  
when the engine is running.  
8011-205chg  
Always stop the engine when refueling.  
Do not smoke when filling the gasoline tank and  
do not pour gasoline in the vicinity of sparks or  
open flame.  
Never fill the fuel tank indoors.  
Never fill the fuel tank indoors.  
Before starting the machine after refueling, it  
should be moved at least 10 feet (3 M) from  
the location where it was filled.  
Turn off the fuel supply for storage or transport.  
If leaks arise in the fuel system, the engine must  
not be started until the problem has been  
resolved.  
1
8011-186  
Close the fuel valve.  
1. FUEL VALVE  
Check the fuel level before each use and leave  
space for the fuel to expand, because the heat  
from the engine and the sun can otherwise  
cause the fuel to expand and overflow.  
Avoid overfilling. If you spill gasoline on the  
machine, wipe up the spill and wait until it has  
evaporated before starting the engine. If you  
spill gasoline on your clothing, change your  
clothing.  
8011-222chg  
Fueling always poses an element of risk.  
12  
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SAFETY INSTRUCTIONS  
Maintenance  
Never make adjustments with the engine  
running.  
Disengage the drive units, shut off the engine  
and wait until all moving parts come to a  
complete stop before making adjustments,  
performing maintenance or cleaning the  
machine.  
Disconnect the spark plug cable before  
beginning repair work.  
Keep all components in serviceable condition  
and make sure all nuts, bolts, etc. are tight.  
Replace worn or damaged decals.  
8011-027  
Remove the spark plug cable.  
Be careful when checking work tools. Use  
gloves when performing maintenance work.  
Never allow persons not trained in the use of  
the machine to perform service on it.  
WARNING!  
Wait until all moving parts are completely  
still before performing maintenance on  
the machine.  
Always park the machine on even ground before  
performing maintenance or making  
adjustments.  
Do not disassemble the engine. This can  
invalidate your engine warranty. Contact your  
dealer if you have any questions regarding  
service or guarantee matters. Follow all  
maintenance instructions.  
Turn off the engine and remove the  
spark plug cable.  
Do not change the setting of governors and  
avoid running the engine with overly high RPM.  
If you run the engine too fast, you risk damaging  
the machine components.  
Do not modify safety equipment. Check  
regularly to be sure it works properly. The  
machine must not be run with defective or  
disassembled safety equipment.  
The muffler is designed to maintain sound levels  
at an approved level and keep direct exhaust  
away from the user. Exhaust gases from the  
engine are extremely hot and may contain  
sparks that can cause fires or burn the user.  
8011-210chg  
Keep the machine clean.  
Never use a machine with a defective muffler.  
Reduce the risk of fire by removing grass,  
leaves and other debris that may have caught  
in the machine.  
13  
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PROTECTIVE EQUIPMENT  
Personal equipment  
Consult your Husqvarna dealer when selecting  
protective equipment. Our dealers have a broad  
assortment of equipment for professionals such  
as forestry workers and knowledge about  
occupational environment requirements and  
protective levels.  
Before using the stump grinder, you may in many  
cases need to cut back the object with a power  
saw. Hence, it is appropriate to use personal  
protective equipment that fulfils requirements for  
working with both stump grinders and power  
saws.  
The main difference is that you should wear  
protective glasses when operating the stump  
grinder while the wire mesh visor gives sufficient  
protection when using a power saw. Thus when  
using the stump grinder, we recommend using  
both a wire mesh visor to protect your face and  
protective glasses. Alternatively, you can use a  
Plexiglas face guard, but it scratches more easily  
and is more susceptible to soiling and fogging.  
You require the following personal protective  
equipment:  
8011-140  
1. Protective helmet (hard hat)  
2. Ear protection  
3. Face guard  
4. Protective trousers  
5. Protective glasses  
6. Breathing protection (risk of dusty work  
environment)  
7. Protective gloves  
8. First aid kit  
9. Protective boots or steel-toed shoes  
14  
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SET-UP  
Equipment set-up  
1. Remove crate top and sides.  
2. Remove upper handle bar assembly and lay  
aside.  
1
7
2
3. Open bag containing loose hardware.  
4. Using four (4) screws, flat washers and nuts  
attach the upper handle bar assembly to lower  
handle bar assembly. See Figure 1.  
3
4
NOTE: Handle fit is tight. When aligning holes use  
a tapered type pilot to help align holes (i.e.  
punch or phillips style screw driver).  
5
6
5. Attach the position adjusting rod to bracket on  
the lower and upper handle bar assemblies.  
See Figure 1.  
FIGURE 1  
1. WASHERS (2)  
5. COTTER PIN (1)  
2. COTTER PINS (2)  
6. LOWER HANDLE BAR  
3. UPPER HANDLE BAR  
7. HARDWARE  
4. ADJUSTING ROD  
1
6. Assemble the compression spring, two (2) flat  
washers and yoke to brake rod assembly. See  
Figure 2. Screw yoke onto the rod assembly  
till rod is even or thru threaded portion of yoke  
about 1/4” (6.35 mm).  
4
2
3
FIGURE 2  
1. WASHERS  
2. YOKE  
3. SPRING  
4. BRAKE RODASSEMBLY  
1
2
7. Attach brake rod assembly to brake handle on  
the upper handle bar assembly. See Figure 3.  
3
4
FIGURE 3  
1. WASHER (1)  
2. COTTER PIN (1)  
3. BRAKE HANDLE  
4. BRAKE RODASSEMBLY  
15  
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SET-UP  
8. Attach the yoke to the brake’s top mounting hole  
using the clevis pin and cotter pin. Make sure  
the rod is positioned in the bracket as shown in  
Figure 4.  
NOTE: Adjust the brake before inserting hair pin.  
To engage brake, pull back on handle until brake  
rod assembly goes “over center” and locks the  
brake ON. Turning the yoke clockwise shortens the  
rod tightening the grip on the brake disc by the brake  
pads. counterclockwise loosens the clamping  
force. Proper brake adjustment is such that the  
wheel will not turn, but slide, when handle is over  
center.  
1
2
FIGURE 4  
1. HAIR PIN (1)  
2. CLEVIS PIN (1)  
9. Remove air cleaner and double wire clamp from  
engine. Figure 5.  
1
FIGURE 5  
1. CLAMP  
10. Route the wire harness from engine through  
guide and handle crossmember. Figure 6.  
11. Route the throttle cable through guide on lower  
handle assembly. Figure 6.  
1
12. Connect upper and lower wire harness together.  
Yellow to yellow and black to black.  
2
13. Push throttle control lever on console forward  
to full extent. Pull throttle control lever on engine  
back as far as possible. See Figure 7.  
FIGURE 6  
1. GUIDE  
2. THREAD WIRE HARNESS  
AND THROTTLE CABLE  
16  
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SET-UP  
1
14. Insert “L” end of throttle cable into the outside hole  
of the engine throttle control lever. Figure 7.  
2
FORWARD  
FIGURE 7  
1. ENGINE THROTTLE  
CONTROL LEVER  
2. THROTTLE CABLE  
15. Attach the throttle cable to the engine using the  
double wire clamp removed in step nine. Figure 8.  
16. Test throttle control by pulling back throttle  
handle on console. Throttle arm on engine  
should be pushed completely forward. Cable  
should not slip in clamp when doing this test.  
17. Test proper wire length by pulling on the handle  
adjustment lever and raising and lowering the  
handle to maximum position without any pull  
on harness.  
1
18. Reattach air cleaner to engine.  
19. Unit is now ready to be removed from pallet.  
FIGURE 8  
1. THROTTLE CABLE  
17  
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CONTROLS  
Presentation  
Congratulations on your choice of an exceptionally  
high quality product. This operator’s manual  
describes the Husqvarna stump grinder.  
The machine is equipped with a 13 hp Honda four-  
cycle engine.  
Main components and operating controls  
8
9
5
6
10  
11  
4
8
3
2
5
1
7
1. Handle  
7. Engine  
8. Rear lifting handle  
2. Dead man’s grip bar  
3. Brake lever  
9. Adjustment bar for the handle  
10. Throttle  
4. Belt guard for the cutter drive  
5. Front lifting handle  
6. Cutting wheel  
11. Engine switch  
18  
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CONTROLS  
Engine  
Exterior engine components and controls.  
1. Throttle  
2. Starter  
3. Starter handle  
4. Fuel valve  
5. Choke control  
6. Air filter  
7. Spark plug  
8. Muffler  
10  
8011-126  
9. Oil dipstick  
10. Oil drainage  
11. Oil level guard  
14  
12. Engine switch - disconnected use switch on  
handle bar  
13  
13. Fuel tank  
14. Fuel filler cap  
11  
9
12  
8011-273chg  
Throttle  
The lever on the engine is normally not used. It is  
connected to the throttle on the handle. If the cable  
should bind or break, you can reduce the throttle  
with the lever on the engine as an emergency  
measure to slow the engine speed to an idle and  
stop the cutting wheel.  
1
8011-034  
1. THROTTLE LEVER  
19  
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CONTROLS  
Starter  
The starter is of the magnapull type with spring  
return. To replace the return spring or starter cord,  
contact an authorized service workshop.  
Starter handle  
Misuse of the starter handle can damage the starter.  
Do not twist the starter cord around your hand.  
Pull out the handle slowly until the gears mesh. Do  
not pull out the starter cord completely and do not  
let go of the starter handle when extended.  
8011-127  
Fuel valve  
The fuel valve opens and closes the connection  
between the tank and the carburetor.  
The illustration shows the tank valve closed; to  
open, turn the lever completely to the right. There  
is no middle position.  
Turn off the valve when the machine is not in use  
to avoid flooding the carburetor.  
The fuel valve is combined with a sludge reservoir.  
1
Choke control  
8011-186  
The choke control opens and closes the choke  
valve in the carburetor. This is only used to start a  
cold engine.  
1. FUEL VALVE  
The image shows the choke valve open; to close,  
move the lever to the left. The midway positions  
can be used. When the engine starts, the lever can  
be moved gradually to the right as long as it  
continues to run smoothly. Forgetting the choke is  
evident as the engine runs roughly and produces  
black smoke.  
1
This also results in increased fuel consumption.  
Air filter  
The engine air filter consists of a cyclone filter and  
a fine filter.  
8011-183  
1. CHOKE CONTROL  
Air is drawn in through the screen (3) on the cyclone  
filter and coarser pollutants collect in the container  
(4).  
The fine filter, which consists of a foam rubber pre-  
filter and a paper filter cartridge, is located under  
the cowling (2). The cowling and the cyclone filter  
can be removed by removing the wing nut (1).  
See the chapter “Maintenance/Cleaning the  
cyclone filter and Replacing the air filter” for cleaning  
instructions.  
Running the machine with a dirty air filter will cause  
the engine to run on partial choke and show the  
same symptoms as a forgotten choke described  
above. It can also be difficult to start.  
8011-188  
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CONTROLS  
Spark plug  
The engine spark plug is hidden under the ignition  
cable shoe. When performing service, it is  
important that the engine cannot start accidentally.  
For this reason, always remove the ignition cable  
shoe from the spark plug. To avoid pulling the cable,  
the cable shoe is equipped with a special handle;  
see the illustration.  
Type of spark plug, see “Technical data”.  
Service instructions, see “Maintenance/Electrical  
system”.  
Muffler  
The engine muffler is equipped with a heat  
protective cowling. Nonetheless, it still becomes  
hot when the engine is running. Avoid touching the  
muffler when it is warm. Risk for burns.  
8011-027  
Oil dipstick  
The dipstick for the crankcase oil reservoir is  
located on the front of the engine. Refill the engine  
oil in the hole where the dipstick fits.  
When checking the oil level, the dipstick should not  
be screwed in. The machine should be parked on  
even ground with the engine stopped. Never run  
the engine without the dipstick in place. The engine  
has an electronic oil level guard. It stops and cannot  
be started if the level becomes too low. Yet you  
should not rely entirely on the level guard; rather  
you should check the oil using the dipstick.  
8011-020  
For normal use, we recommend SAE 10W-30  
weight engine oil service SF-SG; see also the  
chapter “Lubrication/Engine oil”.  
Oil drainage  
The drainage screw (5) for the crankcase oil  
reservoir is located on the back of the engine.  
IMPORTANT INFORMATION  
Used engine oil is a health hazard and  
legislation prohibits disposal on the  
ground or in nature; it should always be  
disposed of at a workshop or appropriate  
disposal location. Avoid skin contact; wash  
with soap and water in case of spills.  
8011-187  
21  
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CONTROLS  
Fuel tank  
Underneath the tank, there is a fuel filter combined  
with the fuel valve. The tank volume is 1.72 Gal.  
(6.5 liters)  
Fueling  
Read the safety instructions before fueling.  
Keep the fuel and fuel tank clean. Avoid filling the  
machine with dirty fuel. Make sure the fuel cap is  
properly tightened and the gasket is not damaged,  
particularly before washing the machine.  
Use unleaded gasoline with minimum 86 octane  
rating. Never use gasoline mixed with two-cycle  
oil. For ethanol and methanol fuel, the following  
applies:  
8011-222chg  
Maximum allowable ethanol 10% (volume).  
Maximum allowable methanol 5% (volume).  
WARNING!  
Maximum allowable MTBE (Methyl Tertiary Butyl  
Ether) 15% (volume).  
Gasoline is highly flammable. Observe  
caution and fill the tank outdoors. (See  
the safety instructions.)  
If the engine “bolts” at normal load it can be  
damaged. Change the fuel. If this does not help,  
contact an authorized service workshop.  
Do not fill the tank completely; leave space for the  
fuel to expand as it warms up.  
Centrifugal clutch  
The engine is equipped with a centrifugal clutch  
that is connected to the crankshaft. When the  
engine speed increases, the drive for the cutting  
wheel engages automatically. The centrifugal clutch  
is maintenance-free; it is not possible for the user  
to make adjustments.  
8011-247  
Cutting unit  
Dead man’s grip bar  
The bar must be held against the handle for the  
engine to run. If you release the grip, the ignition  
system short-circuits and the engine stops.  
WARNING!  
Do not bind the bar to the handle.  
It is there for your safety.  
22  
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CONTROLS  
Throttle  
The lever controls engine speed.  
With the lever down, the engine runs at idle and  
functions as start position.  
When the engine speed increases, the centrifugal  
clutch drive automatically engages the cutting  
wheel.  
On/Off Engine switch on the panel  
The ON/OFF engine switch can be used to stop  
the engine. The illustration shows the toggle switch  
in the OFF position (short circuited electrical  
system). There is another switch with the same  
function:  
The micro switch that is affected by the dead  
man’s grip bar.  
To start the engine, the switch must be first set to  
the ON position and the dead man’s grip must be  
held in.  
Brake  
WARNING!  
NEVER operate a machine with a  
defective brake.  
The lever activates a disk brake on the left wheel  
when it is pulled backwards. The brake should  
always be activated when operating the grinder,  
when it is parked and when it is being transported.  
Adjustment bar for the handle  
WARNING!  
DO NOT pull out the adjustment bar  
when the cutting wheel is rotating. There  
is a great risk that you will lose control of  
the machine.  
As the tree stump is ground away, the handle  
position will need to be adjusted. Pull the handle  
backwards and set the handle at a suitable working  
height. Engagement rods are spring loaded to  
insure positive locking when released, but always  
make sure bolts are locked into place after you  
make adjustments.  
23  
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OPERATION  
Starting the engine  
Check that all daily maintenance as described in  
the maintenance schedule has been performed.  
Check that there is sufficient fuel in the tank.  
Fuel valve  
Open the fuel valve. Place the lever all the way to  
the right.  
FUEL VALVE  
8011-182  
Choke control  
When starting the engine warm, the lever should  
be in the right position; see the illustration.  
When starting the engine cold or partially warm,  
place the lever completely or partly to the left.  
CHOKE  
CONTROL  
Move the lever back to the right once the engine  
starts. When the engine is cold, it may be best to  
move the lever back in several stages. Find the  
position where the engine runs smoothly.  
8011-183  
Throttle  
Set the throttle on the handle to the SLOW(START)/  
DISENGAGE position.  
Engine switch on the engine  
Swtich on engine is disconnected, use engine  
switch on handlebar.  
8011-071  
24  
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OPERATION  
Engine switch on the handle  
Set the toggle switch to ON.  
Dead man’s grip bar  
Hold in the bar for the dead man’s grip against the  
handle.  
8011-185  
Starter handle  
The dead man’s grip must be pressed in when  
starting the engine.  
Misuse of the starter handle can damage the starter.  
DO NOT twist the starter cord around your hand.  
Pull out the handle slowly until the gears mesh.  
Then give a sharp pull on the starter handle. DO  
NOT pull out the starter cord completely and DO  
NOT let go of the starter handle when extended.  
8011-127  
Throttle  
Keep the throttle at idle. When the throttle is  
increased, the cutting wheel will begin rotating.  
25  
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OPERATION  
Normal shutdown  
Throttle  
Set the throttle to SLOW/DISENGAGE.  
If the engine has been running full out, let it run  
easily for about 30 seconds to one minute at low  
speed.  
DO NOT let front of unit touch ground until you are  
sure cutting wheel has stopped turning.  
Engine switch  
Wait at least 20 seconds, until the blade has  
stopped.  
Set the toggle switch to OFF.  
Make sure that the blade is resting against the  
ground and has stopped completely before doing  
anything.  
Brake  
Activate the brake by pulling the lever backwards.  
Fuel valve  
Close the fuel valve. Turn the lever all the way to  
the left (see illustration).  
Shutdown in emergency situations  
Release the dead man’s grip.  
Wait until the blade stops.  
Make sure that the blade is resting against the  
ground and has stopped completely before doing  
anything.  
8011-186  
26  
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OPERATION  
Before you start  
Dig away the earth and remove any stones near  
the tree stump that may interfere with your work.  
Check that the ground is free of foreign objects,  
such as electrical cables, barbed wire, etc.  
Cut or trim the stump as necessary using a power  
saw.  
Review all of the machine’s safety decals.  
8011-141  
8011-191  
8011-193  
Use a hard hat, ear and eye protection.Amesh  
visor alone does not provide sufficient eye  
protection; supplement with protective glasses.  
Make sure that you are familiar with safety  
regulations and shutdown procedures  
described previously in the operator’s manual.  
Make sure that all guards are in place and in  
good condition.  
Make sure that the blades and cutters are in  
place and in good condition.  
Make sure that the work area and cutter in  
particular and free from metallic objects such  
as wire, nails, etc. that could be thrown out and  
injure persons in the vicinity and damage the  
equipment.  
Make sure that everyone, including children and  
animals, maintains a distance of at least 50 feet  
(15 M) from the machine. Debris can be thrown  
out and injure people and animals.  
8011-192chg  
27  
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OPERATION  
Using your stump grinder  
WARNING!  
NEVER allow the blade to touch the  
ground until it has stopped turning.  
1. Place the cutting blade near the top front edge  
of the tree stump.  
8011-201-chg  
2. Set the brake to lock position.  
3. Set the throttle to SLOW (START)  
DISENGAGE.  
4. Set engine switch on handlebar to ON.  
28  
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OPERATION  
5. Tilt the machine on its wheels, lifting the cutting  
wheel off the ground.  
8011-202chg  
6. Hold in the dead man’s grip bar and start the  
engine.  
7. Allow the engine to warm up for two minutes at  
idle before grinding.  
8011-127  
8011-185  
8. Set the throttle to FAST to ENGAGE clutch.  
IMPORTANT INFORMATION  
If the cutting wheel is too low, the machine  
may start to “climb” over the stump and  
become unstable.  
9. Place the middle of the cutting wheel  
approximately one inch (2.5 cm) above and  
3/4 to 1 1/2 inches (2-4 cm) into the stump.  
10. Place the cutting wheel in the upper front edge  
of the stump. Swing the cutting wheel from side  
to side while lowering it about one inch (2.5 cm)  
after each pass until the front edge of the stump  
is gone.  
8011-203  
29  
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OPERATION  
11. Before moving the machine forwards, you  
should ensure that the cutting wheel is above  
the ground and located on either side of the  
stump. Move the machine forward by releasing  
the brake, pushing it forward, activating the  
brake again and repeating steps 9 and 10.  
12. Repeat steps 9 through 11 until the upper  
portion of the stump has been removed. DO  
NOT cut deeper than ground level at this stage.  
13. Set the throttle to SLOW/(START)  
DISENGAGE and wait until the cutting wheel  
stops rotating.  
14. Release the brake and pull the machine away  
from the stump.  
15. It may be necessary to clear wood chips from  
the area around the stump.  
16. If you want to grind below the ground level, it  
may become necessary to adjust the handle  
position to achieve a better hand and arm work  
position. Pull the handle control lever and adjust  
the handle to the desired position.  
17. Repeat steps 6 through 10 until you reach the  
desired depth.  
4 inches  
18. Shut off the machine when you are done.  
8011-142  
Operating on hills  
Be very careful when operating the stump grinder  
on hills because the machine can slip or move  
unexpectedly.  
NEVER use the machine on grades of 10° or  
steeper.  
Transport  
The Husqvarna stump grinder can be transported  
in a truck, trailer, van or a large SUV (Sport Utility  
Vehicle). The stump grinder is equipped with two  
lifting handles on each side so that two people can  
lift the machine if necessary.  
DO NOT attempt to lift the machine alone. Use safe  
lifting techniques and DO NOT exceed your  
physical limitations.  
8011-278chg  
Secure the machine with tensioning belts, chains  
or other approved materials.  
The lifting handles can also be used to secure the machine for  
transport.  
30  
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MAINTENANCE  
Maintenance schedule  
The following is a list of maintenance procedures that MUST be performed on the machine. For those  
points not described in this manual, visit an authorized service workshop.  
Maintenance  
Daily  
-/10  
1/25  
3/50  
6/100  
12/300  
Check the engine oil level  
X
Change engine oil 1)  
Check the air filter  
X
Clean the air filter 2)  
X
Replace air filter cartridge 2)  
X
X
Clean sludge reservoir for fuel system  
Check and clean the spark plug  
Replace the spark plug  
X
X
Check engine switch function 3)  
X
Check idle speed  
X
X
X
X
Check and adjust play in valves 4)  
Clean fuel tank 4)  
Check, replace fuel lines as necessary 4, 5)  
Check throttle and cable 3)  
X
X
X
X
Check blade and cutter 3)  
Check decals and warning signs 3)  
Check wear and tension on the belts 3)  
Check the chassis, bolts and set screws  
Grease the blade bearings (use high tempera-  
ture grease such as Mobilith SHC 220 or equal)6)  
Grease the wheels (standard lithium base)  
Check tire air pressure (25 psi max)  
X
X
X
X
1)First change after 20 hours. 2)In dusty conditions maintenance is required at shorter intervals.  
3)Before each use. 4)Performed by authorized service workshop. 5)Performed every second year.  
6)Grease every 4 hours.  
WARNING!  
No service operations may be performed on the engine or unit unless:  
The engine is stopped.  
The ignition cable has been removed from the spark plug.  
The machine is securely parked where it will not tip or begin rolling.  
31  
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MAINTENANCE  
Cleaning the cyclone filter  
The cyclone filter collects the largest contaminant  
particles, which collect in the container. When you  
can see a layer of dirt at the bottom of the container,  
the cyclone housing (4), air channels and air intake  
screen (3) must be cleaned.  
8011-188  
Remove the three screw holding the cyclone  
housing. Remove the housing with the air intake  
screen and remove the air channels.  
The air channels may remain in the upper portion  
or follow along with the housing when removed.  
8011-213  
Clean the components. Use water, detergent and  
a washing-up brush. Dry carefully.  
8011-212  
IMPORTANT INFORMATION  
Exercise care when reassembling to avoid  
damaging anything.  
Make sure when mounting that the air  
intake screen fits exactly in its guide in  
the upper portion.  
Make sure the air channel ends up in the  
proper position.  
Refit the components. Place the air channels in  
the cyclone housing. Insert cyclone housing into  
position and make sure it fits in the upper portion.  
DO NOT use force; rather coax it into place before  
fitting the screws.  
8011-213  
32  
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MAINTENANCE  
Replacing the air filter  
If the engine seems weak, produces black smoke  
or runs unevenly, the air filter may be clogged. For  
this reason, it is important to clean and replace the  
air filter regularly (see the maintenance schedule  
for the proper service interval).  
WARNING!  
Allow the exhaust system to cool before  
performing service. Risk for burns.  
8011-188  
Cleaning/replacement of the air filter is carried out  
as follows:  
1. Undo the wing nut (1) and lift off the cyclone  
filter with the air filter cowling (2).  
2. Remove the foam rubber pre-filter and clean  
using a mild detergent.  
Squeeze it dry with a clean cloth.  
Soak it with new engine oil. Wind the filter in an  
absorbent cloth and squeeze out excess oil.  
8011-030  
3. Remove the wing nut in the air filter and remove  
the paper filter. Tap the paper filter against a  
fixed surface to remove dust. If the paper filter  
is still dirty or damaged, it MUST be replaced.  
IMPORTANT INFORMATION  
DO NOT use compressed air over 2 bar/  
30 PSI to clean the paper filter.  
8011-031  
DO NOT wash the paper filter.  
DO NOT oil the paper filter.  
4. Refit the air filter as follows:  
Mount the paper filter in the air filter housing  
and tighten the wing nut.  
5. Refit the pre-filter on the paper filter.  
6. Refit the cyclone filter with the air filter cowling.  
8011-032  
33  
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MAINTENANCE  
Cleaning the sludge reservoir  
1. Close the fuel valve.  
FUEL VALVE  
8011-186  
2. Unscrew the sludge reservoir (2). Make sure  
not to misplace the o-ring (1).  
3. Clean the reservoir and the o-ring using a  
cleaning solvent and dry carefully.  
4. Put the o-ring in place in its track and replace  
the sludge reservoir. Tighten it moderately to  
avoid damaging the threads.  
1
5. Turn the fuel valve to ON and check for leaks. If  
it leaks, replace the o-ring.  
2
8011-128  
Idle adjustment  
WARNING!  
Risk for carbon monoxide poisoning.  
Perform the adjustment outdoors.  
1. Start the engine and run it until it reaches normal  
working temperature.  
2. Adjust the throttle to idle position or so that the  
engine runs at the lowest possible speed.  
3. Turn the idle screw (1) so that the engine idles  
at 1250-1550 RPM.  
8011-129  
4. Increase the idle speed with the throttle and  
move it right back to idle position. Check engine  
speed again.  
34  
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MAINTENANCE  
Ignition system  
The engine is equipped with an electronic ignition  
system. Only the spark plug requires maintenance.  
For recommended spark plug, see “Technical  
data”.  
IMPORTANT INFORMATION  
Fitting the wrong spark plug type can  
damage the engine.  
1. Remove the ignition cable shoe and clean  
around the spark plug.  
2. Remove the spark plug with a 13/16” (21 mm)  
spark plug socket wrench.  
8011-027  
3. Check the spark plug. Replace the spark plug  
if the electrodes are burned or if the insulation  
is cracked or damaged. Clean the spark plug  
with a steel brush if it is to be reused.  
4. Measure the electrode gap with a gapping tool.  
The gap should be 0.7-0.8 mm/0.028-0.031”.  
Adjust as necessary by bending the side  
electrode.  
5. Reinsert the spark plug, turning by hand to avoid  
damaging the threads.  
IMPORTANT INFORMATION  
Inadequately tightened spark plugs can  
cause overheating and damage the  
engine. Tightening the spark plug too  
much can damage the threads in the  
cylinder head.  
8011-054  
6. After the spark plug is seated, tighten it using a  
spark plug wrench so that the washer is  
compressed. A used spark plug should be  
turned 1/8-1/4 of a turn from the seated position.  
A new spark plug should be turned 1/2 a turn  
from the seated position.  
7. Replace the ignition cable shoe.  
35  
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MAINTENANCE  
Adjusting the drive belt  
1. Remove the belt guard by removing the three  
acorn nuts and lockwashers on the front of the  
belt guard.  
WARNING!  
Prevent the engine from being started by  
removing the ignition cable from the spark  
plug.  
8011-226chg  
2. Check that the belt is properly tensioned by  
squeezing the belt together. It should be possible  
to squeeze the belt down about 1/4 - 3/8” (6 -  
10 mm) from the original position.  
8011-227  
COVER PLATE  
3. Loosen screws holding cover plate to belt guard  
backing plate.  
SCREW  
SCREW  
4. Undo the four screws (A) on the cutting shroud.  
5. Loosen the locking nuts (B) on the tension bolts.  
6. Turn the tension bolts (C) counter-clockwise  
to loosen the belt or clockwise to tighten it.  
8011-228  
36  
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MAINTENANCE  
IMPORTANT INFORMATION  
If pulley on cutter head shaft must be  
moved, the set screws MUST be fully  
removed, fresh “Loctite 242” put on  
threads and re-torqued to 100 - 110 in./lbs.  
(17513 / 19264 Nm).  
7. Check that the pulleys are aligned using a  
staright edge along the inside face of the clutch  
and pulley.  
1
Pulleys must be inline. Maximum gap or mis-  
alignment is 1/16” (.062) or 15.7 mm.  
Adjust using the tension bolts as necessary.  
Check belt tension again.  
8. Tighten all screws and nuts when the  
adjustment is complete. Be certain cover plate  
is not rubbing against cutter wheel shaft.  
8011-229chg  
1. CHECK CLUTCH & PULLEY  
ALIGN USING INSIDE FACE  
9. Refit the belt guard.  
Disassembling and reassembling  
the blade, pockets and teeth  
1
2
IMPORTANT INFORMATION  
The cutters and pockets are mounted on  
the cutting wheel as illustrated.  
L = Left mounting  
R = Right mounting  
Ensure that the tooth cutters are turned  
in the cutting direction.  
8011-215  
1. TOOTH CUTTER  
(CARBIDE FACE)  
2. CUTTING DIRECTION  
37  
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MAINTENANCE  
WARNING!  
The cutters can come loose from the  
cutting wheel if the screws are not  
sufficiently tight. Comply with the  
recommended torque settings.  
Hold the teeth (30-31) in place as in the upper  
diagram when mounting the pockets (32-33). Risk  
for incorrect assembly.  
Insert the screw (34) in one pocket (32), through  
the blade section (28) and out though the pocket  
(33) on the other side.  
Make sure that the roll pins in the back edge of the  
teeth are seated against the back of the pockets.  
This provides the correct gauging of the cutter edge.  
8011-216  
Tighten the screws 120 - 150 ft/lbs. (162-203 Nm).  
Insert a bar through the extra holes in the cutting  
wheel to act as a stop when removing and  
attaching the cutting teeth and bearings.  
Removing and refitting the wheels  
To remove the left wheel (8) from the stump grinder,  
remove the locking collar (9), the 1/4” screws (10),  
the 1/4” hex nuts (3), the springs (4) and the brake  
pad (7). The wheel can now be removed from the  
axle.  
RIGHT  
To remove the right wheel (2), remove the locking  
collar (1) and slide the wheel off the axle.  
FRONT  
LEFT  
8011-217chg  
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MAINTENANCE  
Adjusting the brake  
Overcentering type handle activites brakes.  
Undo clevis pin from brake and turn clockwise to  
tighten brake or counter clockwise to loosen.  
Tighten so handle snaps down when locked but  
unlocks easily when handle is moved forward.  
Brake is properly adjusted when wheel will not turn  
when you try to push or pull unit.  
2
1
1. CLEVIS PIN  
2. HAIR PIN  
Two minute rule  
The machine may be tipped backward or on its  
side to facilitate access for cleaning or service, but  
no longer than 2 minutes.  
If the machine is held in this position for too long,  
the engine can be damaged by gasoline draining  
into the crankcase. Should this happen, perform  
an extra oil change on the engine. Remove the  
spark plug and turn the engine over a few  
revolutions with the starter handle before starting  
the engine again.  
Cleaning and washing  
Regular cleaning and washing will increase the  
machine’s lifespan. Make it a habit to clean the  
machine directly after use, before the dirt sticks.  
Check before rinsing that the fuel tank lid is properly  
in place to avoid getting water in the tank.  
Use caution when using high-pressure spray  
because warning decals, instruction signs and the  
engine can be damaged. Do not exceed 70 bar/  
1000 PSI water pressure when cleaning.  
Lubricate the machine after cleaning. This is  
particularly important if the machine is to be stored.  
8011-210chg  
39  
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LUBRICATION  
6
4
50  
100  
300  
Yearly Months Weekly Daily  
Hours Hours Hours Hours  
8011-276chg  
40  
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LUBRICATION  
1. Engine oil  
The engine should be warm (but not hot) when  
changing the oil. Warm oil flows out faster and  
leaves a smaller quantity of old oil inside the engine.  
WARNING!  
Engine oil can be very hot if it is drained  
directly after stopping the machine. Allow  
the engine to cool somewhat.  
1. Place a suitable vessel underneath the oil  
drainage screw. Remove the oil dipstick and  
the oil drainage screw (5) on the back surface  
of the engine.  
Tip: Make a channel using a piece of cardboard to  
lead the oil directly into the vessel and avoid soiling  
the machine chassis.  
2. Allow the engine oil to drain into the vessel; then  
replace the drainage screw. Tighten it  
moderately.  
IMPORTANT INFORMATION  
Used engine oil is a health hazard and  
legislation prohibits disposal on the  
ground or in nature; it should always be  
disposed of at a workshop or appropriate  
disposal location. Avoid skin contact; wash  
with soap and water in case of spills.  
8011-187  
3. Make sure the machine is parked on flat ground.  
Fill with new oil using the appropriate viscosity  
according to the diagram, API Service SF-SG,  
to the upper level mark on the dipstick = threads  
on the oil dipstick (2). The engine takes 1.16 qts.  
(1.1 liters) of oil. When checking the oil level, the  
dipstick should not be screwed in.  
8011-045chg  
4. Check that the rubber gasket is in position and  
screw the dipstick back into place. DO NOT  
thighten it askew or too hard or you may  
damage the threads.  
5. Wipe up any spilled oil.  
Checking the engine’s oil level.  
Make sure that the machine is parked on flat ground  
with the engine stopped when checking the oil level.  
8011-046  
1. Unscrew the dipstick and wipe it using paper  
towel or a lint-free rag.  
2. Replace the dipstick without screwing it in.  
Remove and check the level on the dipstick.  
3. Fill oil as necessary to the lip of the dipstick  
hole. Oil type, see above.  
4. Check that the rubber gasket is in position and  
screw the dipstick back into place. DO NOT  
tighten it askew or too hard or you may damage  
the threads.  
8011-020  
41  
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LUBRICATION  
2. Right wheel  
Lubricate using a grease gun until the grease  
squeezes out, 1 nipple.  
Use good quality MP grease. Grease from well-  
known brand names (petrochemical companies,  
etc.) usually maintains a good quality.  
8011-231  
3. Throttle cable  
Peel back the rubber covers at both of the cable  
mountings. Grease both ends of the throttle cable  
and move the controls to end stop positions when  
lubricating. Refit the rubber covers on the cable  
after lubrication. Cables with sheaths will bind if  
they are not lubricated regularly. Binding in a cable  
may cause malfunction.  
If the cable binds, remove the cable and hang it  
vertically. Lubricate it with thin engine oil until the  
oil begins to escape from the bottom.  
Tip: Fill a small plastic bag with oil and tape it so  
that it seals against the casing and allow the cable  
to hang vertically from the bag overnight. If you do  
not succeed in lubricating the cable, it must be  
replaced.  
8011-234  
8011-233  
42  
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TROUBLESHOOTING  
Symptom  
Cause  
Action  
The engine will not start  
User error  
Fuel valve closed.  
Choke valve open.  
Engine switch in OFF position.  
Open the fuel valve.  
Close the choke with cold engine.  
Turn engine switch to ON.  
Fuel system  
Fuel tank empty.  
Fill with fuel.  
Clean tank, sludge reservoir and  
empty carburetor.  
Machine stored without  
observing proper procedure  
from chapter “Storage/Winter  
storage”.  
Fill the tank with fresh fuel.  
Contamination, water or ice in  
fuel system  
Clean tank, sludge reservoir,  
fuel lines and carburetor.  
Fill the tank with fresh fuel.  
Contact an authorized service  
workshop.  
Carburetor problems.  
Spark plug  
Wrong spark plug type.  
Buildup on electrodes.  
Short circuit.  
Replace the spark plug.  
Check electrode gap and clean or  
replace spark plug.  
Gasoline or oil on the spark plug. Clean the spark plug. Air the  
engine out. Start with full throttle.  
No spark after  
checking spark plug  
Faulty engine switch, cable  
or ignition.  
Contact an authorized service  
workshop.  
Low compression  
Serious interior engine  
damage or faulty valves.  
Contact an authorized service  
workshop.  
Engine is gutless or runs unevenly  
Air filter  
Clogged air filter.  
Clean or replace the air filter.  
Fuel system  
Machine stored without observ-  
ing proper procedure from  
Clean tank, sludge reservoir and  
empty carburetor.  
chapter “Storage/Winter storage”. Fill the tank with proper fuel.  
(Blue exhaust)  
(Voluminous blue-white  
exhaust)  
Tank filled with 2-cycle mixed oil. Fill the tank with proper fuel.  
Tank filled with diesel.  
Clean tank, sludge reservoir  
and empty carburetor.  
Fill the tank with proper fuel.  
Open choke valve.  
(Black exhaust)  
Choke left on.  
Clogged air filter.  
Carburetor problems  
Clean or replace the air filter.  
Contact an authorized service  
workshop.  
Ignition system  
Wrong spark plug type.  
Buildup on electrodes.  
Short circuit.  
Replace the spark plug.  
Check electrode gap and clean or  
replace spark plug.  
Faulty ignition unit.  
Contact an authorized service  
workshop.  
Low compression  
(possible blue  
exhaust)  
Serious interior engine damage  
or faulty valve.  
Contact an authorized service  
workshop.  
43  
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TROUBLESHOOTING  
Problem  
Possible solutions  
Belt coming off.  
1. Pulleys not aligned.  
2. Belt tension is insufficient. Adjust belt tension.  
Belt engages late  
or slips.  
1. Tighten the belt as described in the operator’s manual.  
2. Reduce cutting depth.  
Belt not staying tight  
after adjustment.  
1. Check for damage on the axle, pulley or key. Make sure  
that the setscrews are properly tightened.  
2. Replace damaged parts.  
The cutting wheel  
does not rotate.  
1. Engine speed is insufficient to activate the centrifugal clutch.  
Make sure the throttle cable is working properly.  
2. Belt tension is insufficient. Adjust belt tension.  
3. Clutch is worn - replace shoes and springs, and/or clutch bearings.  
The cutting wheel  
continues to rotate.  
1. Check that the throttle is disconnected.  
2. Check for damage on the throttle cable.  
3. Check that the throttle cable is properly mounted on the throttle  
valve.  
4. The engine speed is not under 1000 rpm, which is required  
to disengage the centrifugal clutch.  
5. Inspect springs on clutch shoes. If tension on clutch shoes is not  
enough to pull shoes back, replace springs and clutch shoes.  
The parking brake is  
slipping.  
1. Adjust the brake tension in the manner described in the  
operator’s manual.  
2. Check for damage on the brake rod or lever.  
3. Check for wear on the brake pads. Replace as necessary.  
44  
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STORAGE  
Winter storage  
To ready the machine for storage, follow these  
steps:  
At the end of the season, the machine should be  
readied for storage (or if it will not be in use for 1. Clean the machine carefully, particularly the  
longer than 30 days). Fuel allowed to stand for long  
periods of time (30 days or more) can leave sticky  
residues that can plug the carburetor and disrupt  
engine function.  
chassis and working equipment. Touch up  
damage to the paint to prevent rust.  
2. Inspect the machine for worn or damaged parts  
and tighten any nuts or screws that may have  
become loose.  
Fuel stabilizers are an acceptable option as regards  
sticky residues during storage. If alkylate gasoline  
(Aspen) is used, stabilizers are unnecessary  
because this fuel is stable. However, you should  
avoid switching between regular and alkylate  
gasoline as sensitive rubber components can  
harden. Add stabilizer to the fuel in the tank or in  
the storage container.Always use the mixing ratios  
specified by the manufacturer of the stabilizer. Run  
the engine for at least 10 minutes after adding the  
stabilizer so that it reaches the carburetor. DO NOT  
empty the fuel tank and the carburetor if you have  
added stabilizer.  
3. Change the engine oil; dispose of properly.  
4. Open the fuel valve. Empty the fuel tank (1) and  
the carburetor (2).  
8011-130  
NEVER store an engine with fuel in the  
tank indoors or in poorly ventilated  
spaces where fuel vapor can come in  
contact with open flame, sparks or a pilot  
light such as in a boiler, hot water tank,  
clothing drier, etc. Handle the fuel with  
caution. It is very flammable and careless  
use can cause serious damage to person  
and property. Drain the fuel into an  
approved container outdoors and far  
away from open flame. NEVER use  
gasoline for cleaning. Use a de-greaser  
and warm water instead.  
5. Close the fuel valve.  
6. Remove the spark plug and pour about a  
tablespoon of engine oil in the cylinder. Turn  
over the engine so that the oil is evenly  
distributed and then refit the spark plug. Put the  
engine in the compression phase where the  
triangle mark on the sleeve of the starter is  
aligned with the upper hole in the starter. Note:  
Compression phase occurs every second  
revolution.  
Service  
When ordering spare parts, please specify the  
puschase year, model, type, and serial number.  
8011-131  
Always use genuine Husqvarna parts.  
7. Lubricate all grease nipples, joints and cables  
as described in the chapter “Lubrication/  
Lubrication schedule”.  
An annual check-up at an authorized service  
workshop is a good way to ensure that your  
machine performs its best the following season.  
8. Store the machine in a clean, dry place and  
cover it for extra protection.  
9. Cover the blade and cutters with a thin coat of  
oil to avoid rust.  
45  
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TECHNICAL DATA  
SPECIFICATIONS:  
Model  
SG13A  
Engine  
Honda GX390  
389 cm3 (23.7 cu in)  
Cylinder volume  
Power  
13 hp (9.6 kW) at 3600 RPM  
Torque  
26.5 Nm at 2500 RPM  
1250-1550 RPM  
Idling speed  
Spark plug  
NK BPR6ES  
DENSO W20EPR-U  
Fuel tank volume  
Tires  
6.5 liters/1.72 US Gal  
4.10-6 (12” pneumatic)  
Brake  
Disk - Lever activated  
Drive  
Direct  
Belt  
Gates HiPower double V-belt BP54  
Noram centrifugal clutch  
14” dia. x 3/8” thick disc (157.5 mm x 9.5 mm)  
Clutch  
Cutting wheel  
Cutters  
8 cutters with tungsten carbide tips  
including pocket  
Cutting depth  
Length  
Approx 12” (30.48 cm)  
62” - 73” (157- 185 cm) depending  
on handle position  
Width  
Height  
27” (69 cm)  
24” - 43” (61 - 109 cm) depending  
on handle position  
Weight  
249 lb. (112.9 kg)  
46  
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WIRING DIAGRAM  
SAFETY  
SWITCH  
ON/OFF  
SWITCH  
ENGINEON/OFF  
SWITCH  
(DISCONNECTED)  
TRANSISTOR  
IGNITION  
SPARK  
PLUG  
OIL LEVEL  
GUARD  
COLOR CODE:  
Y - YELLOW  
B - BLACK  
ENGINEHARNESS  
109299  
ENGINEON/OFF  
SWITCH  
(DISCONNECTED)  
TRANSISTOR  
IGNITION  
SPARK  
PLUG  
CONSOLE HARNESS  
109298  
B
B
B
ON/OFF  
SWITCH  
B
B
Y
MODULE  
B
Y
Y
Y
B
SAFETY  
SWITCH  
Y
OIL LEVEL  
GUARD  
47  
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SERVICE JOURNAL  
Action  
Date, stamp, signature  
Delivery service  
1. Break the packaging and make sure the machine has not been  
damaged in transport.  
2. Where applicable, assembly accompanying components.  
3. Check that the machine design corresponds to the  
customer order.  
4. Check that the right amount of oil is in the engine and  
transmission.  
5. Check and adjust air pressure in the tires. (25 psi max.)  
6. Check that the working equipment is properly set.  
7. Check that the drive pulleys and sprockets are aligned.  
8. Check that belts and chains are properly adjusted.  
9. Lubricate the machine as described in the lubrication schedule.  
10. Fill the fuel tank and start the engine.  
11. Check that the machine and working equipment do not  
move in neutral.  
12. Check all operating instruments.  
13. Check decals and information attached to the unit.  
14. Check the engine speed (RPM), see Technical Data.  
15. Check for leakage.  
16. Inform the customer about:  
The need and advantages of following the service schedule.  
The need and advantages of leaving the machine for service  
every 300 hours.  
The effects of service and maintaining a service journal on the  
machine’s resale value.  
17. Fill in the sales papers, etc.  
Delivery service has  
been carried out.  
No remaining notes.  
Certified:  
After the first 20 hours  
1. Change engine oil.  
2. Change oil in reduction gear, where applicable.  
3. Check that belts and chains are properly adjusted.  
4. Tighten screws and nuts.  
48  
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SERVICE JOURNAL  
Action  
Date, stamp, signature  
49  
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