PTO-Driven 6" Wood Chipper
OWNER’S MANUAL
Read carefully and understand RULES FOR SAFE OPERATION and instructions
before operating. Failure to follow the safety rules and other basic safety precautions
may result in serious personal injury.
WORK AREA
Keep everyone — especially children — away from the area of operation.
Anyone who has not read this manual and received instructions from a
qualified person should not be in the area.
Provided labels on the unit advise the user of proper hitch dimensions and
maximum safe operating speed. Check that proper danger labels are supplied with
the drive-line (replacements are available from your drive-line supplier). Provide
easy-to-understand instructions for proper drive-line operation, maintenance and
repair in the operator’s manual.
PERSONAL SAFETY
Stay alert, watch what you are doing and use common sense when operating a
chipper. Do not use a chipper while you are tired or under the influence of
drugs, alcohol or medication. A moment of inattention while operating a chipper
may result in serious personal injury.
Do not attempt to operate the chipper until you have read and understood the
owner’s manual.
Always keep the guards and chip deflector installed properly while operating
the chipper.
Keep the decals in place and in good repair. The factory or your dealer will furnish
new decals upon request.
Keep hair, hands, feet and other extremities out of and away from the hopper.
Make sure there are no loose ends or strings to be caught by the machine.
Point the discharge chute away from doorways, sidewalks, or any areas where
your view is obstructed. The chute should be pointed downwind when possible or the
fines will blow into your eyes and down your neck.
WEAR PROTECTIVE GEAR:
EYES — Wraparound ANSI-approved safety glasses.
EARS — Ear plugs
HANDS — Leather gloves
FEET — Steel-toed boots
LEGS — Heavy pants
ARMS — Long-sleeved shirt
Always use the appropriate eye and ear protection and other safety equipment.
Safety equipment such as dust mask, non-skid safety shoes and a hardhat used for
appropriate conditions will reduce personal injuries.
Avoid accidental starting. Disconnect chipper from PTO when not in use, and when
moving chipper to another work area.
Never leave the chipper running unattended.
Do not attempt alterations, repairs, or adjustments while the chipper head is
turning. Always disconnect the PTO and stop the motor.
ALWAYS make sure the feed roll drive-shaft and pivots are properly lubricated.
ALWAYS make sure the feed roll clutch is properly lubricated and the clutch
releases when the handle is pushed toward the chute.
ALWAYS make sure the PTO shaft does not come apart or bottom out during
the normal lifting range.
Check the chip pile to see if the blades need to be serviced. Long slivers in the
chip pile are a good indication that the blades are dull and need sharpening.
CAUTION: Turn the chipper head over by hand before applying power to
make sure that the head is clear, all the bolts are clear and the knives clear the
case and cutter bar.
DRIVE-LINE SAFETY CHECKLIST
DRIVE-LINE SPECIFICATIONS The first step toward a safe application is
to specify and test the drive-line to make sure it operates properly
under expected field conditions.
Specify and test the proper size joints and telescoping members based upon the
power required by the implement, speed of rotation, joint angles, shock loads, and
expected life. More information may be found in all drive-line manufacturers’ catalogs.
Design and test the hitch angle to prevent the drive-line from:
Extending beyond the recommended maximum length.
Bottoming out.
Reaching a position that allows joints to lock.
Exceeding the maximum allowable angle for constant velocity (CV) joints.
Specify and test telescoping members to allow the lowest possible thrust loads,
considering the expected working conditions.
Specify and test torque limiters to control excessive shock loads. Where necessary,
specify and test overrunning clutches to prevent inertial loads from overpowering the
tractor.
Specify and test torque limiters to control excessive shock loads.
Where necessary, specify and test overrunning clutches to prevent inertial loads from
overpowering the tractor.
HAZARD REDUCTION The second step in specifying a safe drive-line
application is to eliminate as many hazards as possible.
On drive-lines with torque limiting or overrunning devices, specify that the device be
positioned on the end of the drive-line by the implement.
For implement connections which require bolts or set screws, select and/or supply
hardware which minimizes protrusions.
For tractor PTO shaft connections, specify a safety type yoke (twist or slide collar) to
minimize protrusions.
Provide a proper clearance zone for the operation of the drive-line to avoid damaging
the shielding components.
Some common areas of interference are:
Three point linkage.
Extended or eye loop hitch pins.
Hydraulic hoses.
GUARDING Hazards which cannot be eliminated effectively must be
guarded against at all times.
The PTO master shield, integral drive-line shield and implement input connection
shield should provide an interactive guarding system.
Provide instructions by labels or manuals. The implement should be used only with
the tractor’s PTO master shield in place.
Specify and test an integral drive-line shield with end cones which will overlap, but not
interfere with the PTO master shield or implement input connection shield.
Provide an implement input connection shield to interact with the integral drive-line
shield to provide guarding of the shaft coupling and any torque limiting device installed
on the drive-line.
Check that all routine maintenance of the drive-line can be done without removal of
the shields.
MACHINE OPERATION
CAUTION! Turn the chipper head over by hand before applying power to make
sure that the head is clear, all the bolts are clear and the knives clear the case and cutter
bar.
CAUTION: Do not move the unit while the flywheel is turning. Block the wheels and
set the brake while running the head.
1. The chipper is a flywheel-and-knife type of chipper, not a shredder. The blades
actually chip the limbs as they are fed into the head. The blades must be sharp to
operate properly. Dirt, rocks, nails, or other foreign material will shorten blade life.
2. Before operating the chipper, review the machine checklist. After turning the chipper
by hand and making sure there are no obstructions in the head, start the tractor and
raise the chipper until the PTO shaft is within 15 degrees of straight.
3. Start the chipper slowly with the PTO engaged, and release the PTO clutch slowly.
Gradually increase speed until the tractor PTO speed is 540 RPM.
4. The material will feed into the head more easily if you start the pieces with the large
end first. The feed roll will fold branches as they are pulled into the hopper.
Occasionally, a limb fork may have to be cut to feed properly.
5. If the material stops feeding, sometimes a little push on the long end of the limb will
help.
6. If the material stops the feed roll, release the feed roll clutch by pushing it toward the
chute. Hold the clutch in the disengaged mode, and pull the material out of the
hopper. Release the feed roll clutch and the feed roll will turn again.
NOTE: Cut only clean material, or blade life will be shortened.
7. Watch the discharge chute while operating the unit. If the chips stop flowing, stop
feeding material into the unit by moving the feed roll clutch handle toward the chute
and pulling the material from the hopper. Most of the time this will be enough to clear
the chips out of the unit. If the unit slows down noticeably, first shut off the PTO
power, then the tractor, and remove the key.
8. Unplug the head by turning it backwards by hand with the discharge chute and top
section of the wrapper off.
9. Remove the chips from the top of the head. If this fails, remove the clean-out door,
located on the lower part of the front side-plate of the chipper below the main shaft,
then work the chips out of the case.
10. Replace the clean-out door after all the chips are removed, being sure to use both
the lock washers and flat washers.
11. Do not operate the unit without the deflector in place.
12. Before stopping the chipper, be sure the all of the material is out of the head and out
of the feed roll.
13. All of the material in the chute must be gone or the unit could jam on a small piece of
material. This can usually be cleared by turning the unit backwards by hand.
14. To replace the blades, take the PTO shaft out of gear, then turn off the tractor. The
blades on most models are replaced or turned by removing the inspection plate on
the side opposite the chute.
15. Unhook the feed roll springs, block the feed roll to maximum position, and, with an
Allen wrench on the chute side and a socket on the other, remove the bolts. (Be
careful not to drop any part inside.)
16. Remove the blade, clean the blade pocket and turn or sharpen the blade. Replace
blade.
17. Torque the bolts to 50 ft.-lbs. in all holes so the bolts are straight through the
flywheel. A small screwdriver or ice pick works well to clean pockets for the Allen
wrench. Replace the inspection plate and reattach the springs.
18. Turn over by hand before applying power.
19. The cutter bar should be adjusted to 0.010 to 0.030" from the blades by loosening
the bolts in the bottom of the chute in the slotted holes and moving the bar on slots.
20. Bolts are to be torqued to 35 ft.-lbs.
21. The cutter bar can be reversed and/or resharpened.
22. Dull blades cause many problems, such as: Seeming lack of power, plugging of the
discharge chute, rough cutting with more vibration than usual, feed roll shaft broken,
main bearing housing broken, main bearing working loose and the flywheel or
blades hitting the case or bed knife, feed roll kicking out of gear, and not feeding.
INSPECTION, MAINTENANCE AND CLEANING
WARNING: Always stop the PTO, turn off the engine and remove the key before
performing any inspection, maintenance, adjustments or cleaning.
Lubricate:
PTO shaft — 2 zerks on universals once a day with multipurpose grease.
Slip Joint — Lubricate with multi-purpose grease.
Feed roll pivot — 2 zerks on underside of chute end. Multipurpose grease every 4 to 8
hours of operation. If dust or fine particles make pivot bind, unhook feed roll springs,
use cleaning solvent on pivot while moving up and down, wipe off, lubricate slides,
and replace springs.
Feed roll drive-shaft — Zerk on feed roll drive-shaft lubricates both the slide and both
universal joints. Add multipurpose grease until grease shows at both universals every
4 to 8 hours of operation, particularly before each use. Occasionally remove and
thoroughly clean this assembly.
Feed roll clutch — While feed roll shaft is off, lubricate the feed roll clutch inside and
outside with multipurpose grease.
Gear box — Check label on the gear box for gear box lubrication.
Check all bolts, set-screws and fasteners after running four hours, and once per day
thereafter.
Check for loose belts and broken pulleys, loose springs, dry slides and proper
lubrication of both feed roll drive-line and feed roll clutch.
The main drive belts on the chipper need co be tight. To tighten these belts, first
loosen the four bottom nuts that hold the jack-shaft bearing. Loosen them about three
turns, then move the nuts on the top of the bearings down an equal amount. Keep the
jack-shaft parallel with the main shaft. Torque the bottom nuts to 80 ft.-lbs.
The belts of the main drive on the PTO chipper should be checked every 8 hours of
operation.
Look for cracks, looseness or other signs of deterioration. For best performance,
replace with a matched set of eight belts.
The feed roll drive belt can be adjusted by first loosening the four bolts that hold the
worm gear box to the base, then moving the gear box away from the chute and
re-torques the bolts to 40 ft.-lbs.
All decals and safety instructions should be kept clean and legible. It is the operator’s
responsibility to replace the decals as needed (they will be mailed at no charge).
TROUBLE SHOOTING
Symptom
Problems
Solution
Main drive
Tighten
Head slows but
tractor does not
belts are slipping
Sharpen/reverse
Sharpen/reverse
Blades dull
Blades dull
Feed roll clutch
kicking in and out
of gear excessively
Release feed roll clutch and remove
material by pulling cut of chute, trim
forks, and feed into chute
Material jammed
in chute
Blades dull
Sharpen/reverse
Sharpen reverse
Not chipping
clean or chip
reflector plugging
Cutter bar not adjusted
properly-adjust to tolerance level
Cutter bar rounded
Chipper head turning too slowly —
check PTO speed at 540 RPM
Feed roll slides
dirty or dry
Clean/lubricate
Fork in material
too wide
Remove and trim
Tighten
Unit won’t feed
Feed roll gear
box belt loose
Feed roll tension springs
stretched-replace
Part Diagram
PARTS LIST
NO.
NO.
43
DESCRIPTION
Chipper blade
DESCRIPTION
1
Bolt 8×18
Washer 8
Washer 8
2
44
45
46
47
48
49
50
5l
Flywheel
3
Key C6*20
4
Gearbox mounting plate
Bolt 6×90
Main shaft assembly
Key C10*50
5
6
Bolt 8×25
Little around plate
Outer protective cover assembly
Front supporting plate
Rear cover
7
Release hand seat
Nut 6
8
9
Nut 8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
Worm reduction gear WPR40 30 1II 52
Bolt 6×12
Key 4X 20
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
Bolt M14×1.5×50
Wash l4
Screw M6X 20
Clutch inner claw
Clutch outer claw
Spring for drive knob
Circlip 25
Nut M14×1.5
Lower cover
Bolt M10×25
Side plate(I)
Oil cup M6
Bolt M6×12
Outer drive shaft
Inner drive shaft
Spring for drive shaft
Bolt 6×90
Discharge pipe
Support shelf, discharge pipe
Bolt M14×140
Tightening handle
Connecting pin
Protective cover
Bolt M12×1.5×45
Washer 12
Nut 6
Release handle
Main clutch handle
Bolt 8×20
Gearbox support plate
Tension spring
Spring lug
Front connecting plate
Washer 22
Nut 22
Feed roll bearing204
Feed roll
Protective cover for pulley
Big belt pulley
Small belt pulley
Belt
Nut M10
Wash 10
Bolt 10×35
Small pulley hub
Screw M6×16
Nut M14x 1.5
Big wash 14
BoltM8×50
Screw M6X30
Screw M10×27
Washer 6
Feed roll bearing 209
Screw M6×20
Stand base P209
Big pulley hub
Bolt M10×50
Chipper bed blade
Plastic plate
Stickler Assembly
Screw M10×27
Feed roll bearing 207
Stand base P207
85
86
87
88
89
Bearing seat shim
Bearing seat adjust screw
Drive shaft
90
91
92
93
94
Washer 12
Rear plate
Driving pulley of W.R.G
Belt
Nut M10
Side plate
Driving pulley of W.R.G
WARNING
Some dust created by power sanding, sawing, grinding, drilling, and other construction
activities contains chemicals known to the State of California to cause cancer, birth defects or
other reproductive harm. Some examples of these chemicals are:
• lead from lead-based paints,
• crystalline silica from bricks and cement and other masonry products, and
• arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how often you do this type of work. To
reduce your exposure to these chemicals: work in a well ventilated area, and work with
approved safety equipment, such as those dust masks that are specially designed to filter out
microscopic particles.
Northern Tool + Equipment Co.,
2800 Southcross Drive West
P.O. Box 1499 Burnsville, MN 5337-0499
Made in China.
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