Harbor Freight Tools Nail Gun 98751 User Manual

3-IN-1 AIR FRAMING NAILER  
98751  
SET UP AND OPERATING INSTRUCTIONS  
Read this material before using this product.  
Failure to do so can result in serious injury.  
SAVE THIS MANUAL.  
©
®
Copyright 2008 by Harbor Freight Tools . All rights reserved. No portion of this manual  
or any artwork contained herein may be reproduced in any shape or form without the  
express written consent of Harbor Freight Tools. Diagrams within this manual may not be  
drawn proportionally. Due to continuing improvements, actual product may differ slightly  
from the product described herein. Tools required for assembly and service may not be  
included.  
For technical questions or replacement parts, please call 1-800-444-3353.  
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tool. Distractions are able to result in  
the loss of control of the tool.  
gloves during use. Wear a full face  
shield if you are producing metal  
filings or wood chips.  
Personal safety  
g.  
h.  
Always wear eye protec-  
tion. Wear ANSI-ap-  
proved safety goggles with  
side shields during use.  
a. Stay alert. Watch what you are do-  
ing and use common sense when  
operating the tool. Do not use the  
tool while tired or under the influ-  
ence of drugs, alcohol, or medica-  
tion. A moment of inattention while  
operating the tool increases the risk  
of injury to persons.  
Always wear hearing  
protection when using  
the tool. Prolonged expo-  
sure to high intensity noise  
is able to cause hearing loss.  
b. Dress properly. Do not wear loose  
clothing or jewelry. Contain long  
hair. Keep hair, clothing, and  
gloves away from moving parts.  
Loose clothes, jewelry, or long hair  
increases the risk of injury to persons  
as a result of being caught in moving  
parts.  
Tool use and care  
a.  
Avoid unintentional  
misfires. Be sure Trigger  
(59) is in the OFF posi-  
tion when not in use and  
before plugging in. Do  
not carry any tool with your finger on  
the Trigger, whether it is attached to  
an air source or not. Do not point tool  
towards yourself or anyone whether it  
contains nails or not.  
c. Avoid unintentional starting. Be  
sure the switch is off before con-  
necting to the air supply. Do not  
carry the tool with your finger on the  
switch or connect the tool to the air  
supply with the switch on.  
b. Do not load nails with Trigger or  
safety depressed. Unintentional fir-  
ing may occur. Always assume Nailer  
contains fasteners.  
d. Remove adjusting keys and  
wrenches before turning the tool  
on. A wrench or a key that is left at-  
tached to a rotating part of the tool  
increases the risk of personal injury.  
c. Do not load fasteners when Nailer  
is connected to air hose. Always  
assume tool contains fasteners. Unin-  
tentional firing may occur.  
e. Do not overreach. Keep proper  
footing and balance at all times.  
Proper footing and balance enables  
better control of the tool in unexpect-  
ed situations.  
d. Properly adjust Nailer angle to  
match corresponding fasteners  
before inserting nail strip. Failure  
to do so can cause Nailer to jam and  
lead to personal and/or property dam-  
age.  
f.  
Use safety equipment. A  
dust mask, non-skid safety  
shoes and a hard hat must  
be used for the applicable  
conditions. Wear heavy-duty work  
e. Fire nails into an appropriate work  
surface only. Do not attempt to fire  
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cleat nails or staples into surfaces  
too hard to penetrate. Do not drive  
cleat nails or staples on top of other  
cleat nails or staples, or at too steep  
an angle. Cleat nails and staples can  
ricochet, causing personal injury.  
Never fire this tool into the air or point  
it toward yourself or another person.  
m. Maintain the tool with care. Keep  
tool clean. A properly maintained tool,  
reduces the risk of binding and is  
easier to control.  
n. Check for misalignment or bind-  
ing of moving parts, breakage of  
parts, and any other condition that  
affects the tool’s operation. If dam-  
aged, have the tool serviced before  
using. Many accidents are caused  
by poorly maintained tools. There is a  
risk of bursting if the tool is damaged.  
f.  
Hold tool away from head and  
body during use. Tool may kick  
back, causing injury.  
g. Do not fire fasteners too close to  
edge of workpiece. They may split  
the workpiece and fly free, causing  
personal injury.  
o. Use only accessories that are  
identified by the manufacturer for  
the specific tool model. Use of an  
accessory not intended for use with  
the specific tool model, increases the  
risk of injury to persons.  
h. Carry tool safely. Carry tool by  
handle.  
i.  
Use clamps or another practical  
way to secure and support the  
workpiece to a stable platform.  
Holding the work by hand or against  
the body is unstable and is able to  
lead to loss of control.  
Service  
a. Tool service must be performed  
only by qualified repair personnel.  
b. When servicing a tool, use only  
identical replacement parts. Use  
only authorized parts.  
j.  
Do not force the tool. Use correct  
tool for application. The correct tool  
will do the job better and safer at the  
rate for which the tool is designed.  
c. Use only the lubricants supplied  
with the tool or specified by the  
manufacturer.  
k. Disconnect the tool from the air  
source before making any adjust-  
ments, changing accessories, or  
storing the tool. Such preventive  
safety measures reduce the risk  
of starting the tool unintentionally.  
Turn off and detach the air supply  
and safely discharge any residual  
air pressure before leaving the work  
area.  
Air source  
a.  
Never connect to an air  
source that is capable of  
exceeding 120 PSI. Over  
pressurizing the tool may  
cause bursting, abnormal operation,  
breakage of the tool or serious injury  
to persons. Use only clean, dry,  
regulated compressed air at the rated  
pressure or within the rated pressure  
range as marked on the tool (70 to  
120 PSI). Always verify prior to using  
l.  
Store the tool when it is idle out of  
reach of children and other un-  
trained persons. A tool is dangerous  
in the hands of untrained users.  
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the tool that the air source has been  
adjusted to the rated air pressure or  
within the rated air-pressure range.  
Symbol Definitions  
Symbol  
Property or statement  
WARNING marking concerning Risk  
of Hearing Loss. Wear hearing  
protection.  
b. Never use oxygen, carbon dioxide,  
combustible gases or any bottled  
gas as an air source for the tool.  
Such gases are capable of explosion  
and serious injury to persons.  
WARNING marking concerning Risk  
of Respiratory Injury. Wear NIOSH-  
approved dust mask/respirator.  
WARNING marking concerning Risk  
of Explosion.  
SAVE THESE  
INSTRUCTIONS.  
Specific Safety Instructions  
1. The warnings and precautions dis-  
cussed in this manual cannot cover  
all possible conditions and situations  
that may occur. It must be under-  
stood by the operator that common  
sense and caution are factors which  
cannot be built into this product, but  
must be supplied by the operator.  
SYMBOLS AND  
SPECIFIC SAFETY  
INSTRUCTIONS  
Symbol Definitions  
Symbol  
Property or statement  
No-load speed  
n
o
2. WARNING: Some dust created by  
power sanding, sawing, grinding, drill-  
ing, 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:  
Revolutions or reciprocation per  
minute  
.../min  
PSI  
Pounds per square inch of pressure  
Foot-pounds of torque  
ft-lb  
Blows per minute  
BPM  
CFM  
SCFM  
NPT  
• Lead from lead-based paints  
• Crystalline silica from bricks and  
cement or other masonry products  
• Arsenic and chromium from chemi-  
cally treated lumber  
Your risk from these exposures var-  
ies, 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  
Cubic Feet per Minute flow  
Cubic Feet per Minute flow at  
standard conditions  
National pipe thread, tapered  
National pipe thread, straight  
NPS  
WARNING marking concerning Risk  
of Eye Injury. Wear ANSI-approved  
eye protection.  
Chart continued in next column.  
SKU 98751  
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particles. (California Health & Safety 1. Anyone using vibrating tools regu-  
Code § 25249.5, et seq.)  
larly or for an extended period should  
first be examined by a doctor and  
then have regular medical check-  
ups to ensure medical problems are  
not being caused or worsened from  
use. Pregnant women or people  
who have impaired blood circulation  
to the hand, past hand injuries, ner-  
vous system disorders, diabetes, or  
Raynaud’s Disease should not use  
this tool. If you feel any medical or  
physical symptoms related to vibra-  
tion (such as tingling, numbness, and  
white or blue fingers), seek medical  
advice as soon as possible.  
3. Take caution, as some woods contain  
preservatives such as copper chro-  
mium arsenate (CCA) which can be  
toxic. When nailing these materials,  
extra care should be taken to avoid  
inhalation and minimize skin contact.  
4. WARNING: The brass components  
of this product contain lead, a chemi-  
cal known to the State of California  
to cause birth defects (or other repro-  
ductive harm). (California Health &  
Safety code § 25249.5, et seq.)  
5. Only use with accessories rated to  
handle forces exerted by tool during  
operation. Other accessories not de-  
signed for the forces generated may  
break and forcefully launch pieces.  
2. Do not smoke during use. Nico-  
tine reduces the blood supply to the  
hands and fingers, increasing the risk  
of vibration-related injury.  
3. Wear suitable gloves to reduce the  
vibration effects on the user.  
6. Attach all accessories properly to the  
tool before connecting the air sup-  
ply. A loose accessory may detach or  
break during operation.  
4. Use tools with the lowest vibration  
when there is a choice between dif-  
ferent processes.  
7. Obey the manual for the air compres-  
sor used to power this tool.  
5. Include vibration-free periods each  
day of work.  
8. Install in-line shutoff valve to allow  
immediate control over air supply in  
emergency, even if hose is ruptured.  
6. Grip tool as lightly as possible (while  
still keeping safe control of it). Let  
the tool do the work.  
9. Do not lay tool down until it has com-  
pletely stopped. Moving parts can  
7. To reduce vibration, maintain tool as  
explained in this manual. If abnormal  
vibration occurs, stop immediately.  
grab surface and lead to control loss.  
Vibration Precautions  
This tool vibrates during use. Re-  
peated or long-term exposure to vibra-  
tion may cause temporary or permanent  
physical injury, particularly to the hands,  
arms and shoulders. To reduce the risk of  
vibration-related injury:  
SAVE THESE  
INSTRUCTIONS.  
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Air Supply  
Functional Description  
TO PREVENT  
Specifications  
EXPLOSION:  
Use only clean, dry, regulated,  
compressed air to power this  
tool. Do not use oxygen,  
carbon dioxide, combustible  
gases, or any other bottled  
gas as a power source for this  
tool.  
Air Pressure Range 70-120 PSI  
Maximum Air  
120 PSI  
Pressure  
Air Inlet  
1/4” -18 NPT  
.113”-.131” Shank  
Nail Type / Length Clipped or Full Head Nails  
2” to 3-1/2” Length  
Magazine  
Capacity  
21° - 60 Nails  
28°/34° - 100 Nails  
1. Connect a regulator valve, an in-line  
shut off valve and 1/4” NPT air hose  
(all sold separately) to the Quick Con-  
nector. Use thread tape on all thread-  
ed connections.The air hose must be  
long enough to reach the work area  
with enough extra length to allow free  
movement while working. An in-line  
shutoff ball valve is an important  
safety device because it controls  
the air supply even if the air hose  
is ruptured. The shutoff valve  
should be a ball valve because it  
can be closed quickly.  
Air Consumption  
Hose  
3 CFM @ 90 PSI  
3/8”  
Safety Trigger  
Full Sequential Actuation  
Initial Tool Set Up / Assembly  
Read the ENTIRE IMPORTANT  
SAFETY INFORMATION  
section at the beginning of this  
manual including all text under  
subheadings therein before set  
up or use of this product.  
See pages 8 and 9 for Air Tool  
Setup procedures.  
Note: For additional information regarding  
the parts listed in the following pages,  
refer to the Assembly Diagram near  
the end of this manual.  
Note: If an automatic oiler system is not  
used, add a few drops of Pneumatic  
Tool Oil to the airline connection be-  
fore operation. Add a few more drops  
after each hour of continual use.  
Unpacking  
When unpacking, check to make sure  
that the item is intact and undamaged. If  
any parts are missing or broken, please  
call Harbor Freight Tools at the number  
shown throughout the manual as soon as  
possible.  
2. Attach an air hose to the compres-  
sor’s air outlet. Connect the air hose  
to the air inlet of the tool. Other com-  
ponents, such as a connector and  
quick coupler, will make operation  
more efficient, but are not required.  
This air tool may be shipped with a  
protective plug covering the air inlet.  
Remove this plug before set up.  
WARNING! TO PREVENT SERIOUS  
INJURY FROM ACCIDENTAL  
OPERATION:  
Do not install a quick coupler on  
the tool. Such a coupler contains  
Rev 11a  
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Air Tool & Spray Gun Portable Setup  
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Air Tool & Spray Gun Stationary Setup  
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an air valve that will allow the air  
tool to retain pressure and operate  
accidentally after the air supply is  
disconnected.  
Operation  
Read the ENTIRE IMPORTANT  
SAFETY INFORMATION  
Note: Air flow, and therefore tool perfor-  
mance, can be hindered by under-  
sized air supply components.  
section at the beginning of this  
manual including all text under  
subheadings therein before set  
up or use of this product.  
3. The air hose must be long enough  
to reach the work area with enough  
extra length to allow free movement  
while working.  
Inspect tool before use, looking  
for damaged, loose, and  
missing parts. If any problems  
are found, do not use tool until  
repaired.  
4. Close the in-line safety valve be-  
tween the compressor and the tool.  
Testing the Full Sequential  
Safety Trip Mechanism  
5. Turn on the air compressor according  
to the manufacturer’s directions and  
allow it to build up pressure until it  
cycles off.  
TO PREVENT  
SERIOUS INJURY  
6. Adjust the air compressor’s output  
regulator so that the air output is  
enough to properly power the tool,  
but the output will not exceed the  
tool’s maximum air pressure at any  
time. Adjust the pressure gradually,  
while checking the air output gauge  
to set the right pressure range.  
FROM ACCIDENTAL  
OPERATION: Detach the air  
supply, safely discharge any  
residual air pressure in the  
tool before performing any  
inspection, maintenance, or  
cleaning procedures.  
TO PREVENT SERIOUS  
INJURY: Do not adjust or  
tamper with any control or  
component in a way not  
specifically explained within  
this manual. Improper  
adjustment can result in  
tool failure or other serious  
hazards.  
7. Inspect the air connections for leaks.  
Repair any leaks found.  
8. If the tool will not be used at this time,  
turn off and detach the air supply  
and safely discharge any residual air  
pressure.  
Note: Residual air pressure should not be  
present after the tool is disconnected  
from the air supply. However, it is a  
good safety measure to attempt to  
discharge the tool in a safe fashion  
after disconnecting to ensure that the  
tool is disconnected and unpowered.  
1. WARNING! Even though the Nailer  
should be empty during this proce-  
dure, ALWAYS point the Nailer at a  
piece of scrap wood when testing.  
2. Completely empty Magazine (79).  
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lift the Nailer and press it against the  
workpiece again. The tool must not  
cycle (fire). If it fails to perform in  
the manner explained in bold, have it  
repaired by a qualified service techni-  
cian.  
Air Coupler (95)  
Trigger (59)  
WARNING! Disconnect the Nailer  
from the air compressor whenever  
loading or servicing.  
Magazine (79)  
Figure 1  
WEAR ANSI-APPROVED IMPACT  
SAFETY GOGGLES WHEN RE-  
LOADING OR DOING ANY OTHER  
MAINTENANCE ON NAILER. Other  
people in work area must also  
wear ANSI-approved safety gog-  
gles.  
Safety Nosepiece (42)  
3. The Nailer should not fire if Safety  
Nosepiece (42) is not depressed  
against the workpiece.  
4. Make sure Trigger (59) and Safety  
Nosepiece (42) move freely, with-  
out sticking. Do not use nailer if  
Trigger or Safety sticks.  
Loading Nails  
Tab (75)  
5. Connect air supply to the Air Coupler  
(95). Set the regulator at the recom-  
mended 70 to 120 PSI.  
6. Test by depressing Safety Nosepiece  
(42) against the workpiece without  
pulling the Trigger. The Tool must  
not cycle (fire). If it cycles (fires),  
stop immediately and have it repaired  
by a qualified service technician.  
Lock (88)  
Figure 2  
1. Slide the Tab (75) back and the Lock  
(88) will hold it in place. See Figure  
2, above.  
7. Hold tool away or off of workpiece.  
The Safety Nosepiece should return  
to its original position. Squeeze  
Trigger. The tool should not cycle  
(fire). If the tool fires, stop immedi-  
ately and have it repaired by a quali-  
fied service technician.  
2. Load a stick of nails (not included)  
into the top slot, making sure nail  
heads are facing up.  
3. Be Careful. When Lock is released,  
the Tab will automatically and force-  
fully slide forward. Keep your fingers  
clear when releasing Lock.  
8. Depress Safety Nosepiece against  
workpiece and squeeze Trigger. The  
tool must cycle (fire) only once.  
Release the Trigger and squeeze  
it again. The tool must not cycle  
(fire). With the Trigger held, carefully  
4. Note: The Nailer may not work if  
there are only a few nails left in the  
tool. If there are only a few nails  
remaining, simply load another strip  
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of nails into the Magazine behind the  
few remaining nails and the Nailer will  
be ready for further use.  
o
o
o
34  
21  
28  
Operating Nailer  
Set proper angle of the Nailer for your  
application (a three step process):  
Joint Plate (86)  
Figure 5  
Move Magazine so desired hole on  
Joint Plate (86) lines up with the nut  
on Magazine. See Figure 5, above.  
Replace and tighten the Adjuster  
Knob.  
Failure to properly adjust the nailer  
can result in tool failure or damage.  
Angle Adjustment Holes  
3. Inspect Pin’s (34) location. See  
Figure 6, below.  
If you are driving 21° angle nails, the  
Pin should be in the lower hole  
(position A). If you are driving 28° or  
34° angle nails, the Pin should be in  
the upper hole (position B). If the Pin  
is in the wrong position, pull the Pin  
from its Washer (35), reposition the  
Bar Guide (36), and reinsert and  
secure the Pin and Washer. Before  
using Nailer, be sure Pin is properly  
secured.  
Hex  
Bolt  
Tab (75)  
o
o
o
21 28  
34  
Figure 3  
1. Pull back and engage the Tab (75),  
exposing three adjustment holes.  
Loosen the hex bolt and slide it into  
the appropriate hole (21°, 28°, 34°).  
Retighten the hex bolt securely,  
making sure it fits into the appropri-  
ate hole properly. See Figure 3,  
above. Gently release the Tab.  
1. The driving depth of a nail can be  
adjusted in two ways. First, by in-  
creasing or decreasing air pressure  
(never to exceed the maximum of  
120 PSI). Secondly, by loosening the  
Depth Screw (41) and adjusting the  
Bracket A (40). We recommend you  
experiment in a scrap piece of mate-  
rial to determine how far to adjust the  
unit.  
Adjuster Knob (85)  
2. Attach air supply to Air Coupler. Start  
your air compressor and make sure it  
is set to between the recommended  
70-120 PSI.  
Figure 4  
2. Remove the Adjuster Knob (85). See  
Figure 4, above.  
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3. To re, place the Safety Nosepiece  
of the Nailer on the workpiece. The  
Nailer should not fire if the Safety  
Nosepiece is not depressed. Once  
depressed, quickly squeeze the  
Trigger once. Do not fire repeat-  
edly; nails could bounce off of one  
another causing injury. We recom-  
mend practicing with a piece of scrap  
material.  
b. Empty the Magazine (79) com-  
pletely.  
c. Try to fire the Nailer into a piece of  
scrap wood to ensure that there is  
no trapped air in the system.  
d. Always leave Magazine open dur-  
ing maintenance. The Magazine  
is spring-loaded and may cause  
parts or a nail to fly out of Nailer.  
1. If a nail is jammed in the discharge  
4. The Rubber Cover (43) provides a  
non-marring surface. If desired, the  
Rubber Cover may be removed to ex-  
pose the teeth on Safety Nosepiece.  
Doing so provides a nonslip surface  
and can improve accuracy.  
area, simply remove it with pliers.  
2. If a nail is jammed in the magazine,  
pull the Tab (75) all the way back  
to the disengaged position. Using a  
screwdriver, attempt to release the  
jammed nail by probing either or both  
of the two openings in the maga-  
zine to release the nail. Pull out the  
jammed nail and the remainder of the  
nail strip that is still in the magazine.  
5. When finished, disconnect the Nailer  
from the air source.  
Clearing Jams  
3. Dispose of the remaining nail strip;  
it may be bent or damaged in some  
other way. Reload the magazine with  
a new nail strip.  
WARNING! Anytime any  
maintenance or repairs are  
done (including clearing  
jams), wear ANSI-approved  
impact safety goggles and appro-  
priate hearing protection. THEN:  
4. Be careful. When pulling back  
the Tab, it will spring forward with  
a. Disconnect the Nailer from its air  
supply.  
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force. Keep your fingers clear when  
releasing.  
TO PREVENT EXPLOSION:  
Lubricate the tool only  
with specified lubricants.  
Lubricate the air inlet  
using only pneumatic tool  
oil. Lubricate the internal  
mechanism using only  
white lithium grease. Other  
lubricants may damage the  
mechanism and may be  
highly flammable, causing an  
explosion.  
5. If you are unable to clear the nail  
jam using the method prescribed  
above, the tool should be taken to  
a qualified service technician for  
proper servicing.  
User-Maintenance  
Procedures not specifically  
explained in this manual  
must be performed only by a  
qualified technician.  
WARNING! Anytime any  
maintenance or repairs are  
done, wear ANSI-approved  
impact safety goggles and  
appropriate hearing protection.  
THEN:  
TO PREVENT  
SERIOUS INJURY  
FROM ACCIDENTAL  
OPERATION:  
Turn off the tool, detach the  
air supply, safely discharge  
any residual air pressure in  
the tool before performing any  
inspection, maintenance, or  
cleaning procedures.  
a. Disconnect the Nailer from its air  
supply.  
b. Empty the Magazine (79) com-  
pletely.  
c. Try to fire the Nailer into a piece of  
scrap wood to ensure that there is  
no trapped air in the system.  
TO PREVENT SERIOUS  
INJURY FROM TOOL  
FAILURE:  
d. Always leave Magazine open dur-  
ing maintenance. The Magazine  
is spring-loaded and may cause  
parts or a nail to fly out of Nailer.  
Do not use damaged  
equipment. If abnormal  
noise, vibration, or leaking  
air occurs, have the problem  
corrected before further use.  
6. Dirt in the air supply is a major cause  
of pneumatic tool wear. Use a filter in  
the compressed air system for better  
performance and longer tool life.  
7. Make sure Trigger (59) and Safety  
Nosepiece (42) move freely, with-  
out sticking. Do not use nailer if  
Trigger or Safety Nosepiece sticks.  
8. Wipe down exterior of the Nailer with  
a clean cloth before storing.  
9. Store in a clean, dry and safe location  
out of reach of children.  
REV 09e  
SKU 98751  
For technical questions, please call 1-800-444-3353.  
Page 14  
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Troubleshooting  
Problem  
Possible Causes  
Likely Solutions  
1. Loose Screw (6).  
1. Tighten and recheck.  
Air leaking in Cylinder Cap (8).  
2. Gasket (9) is cracked or worn. 2. Replace Gasket.  
1. Tool is too dry.  
1. Add about 3 drops of pneumatic  
tool oil into the Air Coupler (95).  
Lack of power. Slow to cycle.  
Low power when shooting and  
returning.  
2. Air pressure too low.  
2. Check to make sure regulator on  
air compressor is set between  
70 PSI and 120 PSI.  
3. Exhaust blocked.  
3. Clean exhaust channel.  
1. Damaged Torsion Spring (89). 1. Replace Spring.  
Not shooting fasteners or only 2. Wrong size of fasteners.  
2. Use 2” to 3-1/2” Nails.  
intermittent feeding.  
3. Magazine (79) or Joint Plate  
3. Clean Magazine and Plate.  
(86) is dirty.  
1. Driver channel is worn.  
1. Replace Driver Channel (30)  
and/or Driver (20).  
2. Replace Feeder Shoe.  
2. Feeder Shoe (73) is broken or  
worn.  
Fastener is jammed in tool.  
3. Bent fasteners.  
3. Remove bent fasteners.  
Replace with new fasteners.  
4. Check all 3 angle adjustments  
4. Nailer angle is not properly  
adjusted for the correct angle  
nail clip.  
as outlined on page 10.  
Follow all safety precautions whenever diagnosing or servicing the  
tool. Disconnect air supply before service.  
PLEASE READ THE FOLLOWING CAREFULLY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND  
ASSEMBLY DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE  
MANUFACTURER OR DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF  
ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO  
THE PRODUCT, OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE  
PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY STATES  
THATALLREPAIRSAND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BYCERTIFIED  
AND LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK  
AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR  
REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF  
REPLACEMENT PARTS THERETO.  
REV 08j  
SKU 98751  
For technical questions, please call 1-800-444-3353.  
Page 15  
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Parts List  
Part  
Description  
Screw  
Description  
O-Ring (M9.5 x 1.9)  
O-Ring (M10.3 x 1.9)  
Quantity  
Part  
49  
50  
Quantity  
1
1
3
1
1
1
3
2
1
3
3
1
2
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
2
1
1
1
1
1
1
5
3
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
2
3
Spring Washer  
Bushing  
51A Trigger Valve Head  
4
5
Exhaust Cover  
Seal  
52  
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  
85  
86  
87  
88  
89  
90  
91  
92  
93  
94  
95  
O-Ring (M12.8 x 1.9)  
Spring  
6
Screw  
O-Ring (M5.5 x 1.5)  
Trigger Valve Stem  
O-Ring (M24.8 x 2)  
Trigger Valve Guide  
Spring  
Trigger  
Seal  
Trigger Pin  
Nut  
Washer  
Screw  
Turn Plate B  
Bushing  
Turn Plate A  
Bushing  
Screw  
Coil Spring Base  
Pin  
Screw  
Movable Feeder Shoe  
Screw  
7
Spring Washer  
Cylinder Cap  
O-Ring sealing  
Washer  
Valve Seat  
Spring  
O-Ring (M57.5 x 3.6)  
O-Ring (M72.4 x 3.5)  
Valve  
Screw  
Cylinder Seal  
Collar  
O-Ring (M54.4 x 4)  
Driver  
Cylinder  
O-Ring (M67 x 3)  
O-Ring (M60.25 x 2.5)  
Restrictive Seal  
O-Ring (M97.5 x 3.5)  
Bumper A  
Bumper B  
Body  
O-Ring (M62.3 x1.8)  
Driver Channel  
Spring Washer  
Screw  
Washer  
Pin  
Pin Washer  
Bar Guide  
Spring  
Screw  
Washer  
Bracket A  
Depth Screw  
Safety  
Rubber Cover  
Spring Pin  
Safe Guide  
O-Ring (M20.3 x 2.5)  
O-Ring (M20.3 x 1.5)  
Valve Set  
8A  
9A  
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  
43  
44  
45  
46  
47  
48  
Tab  
Spring Washer  
Joint Block  
Screw  
Magazine  
Screw  
Rail  
Washer  
Nut  
Joint Guide  
Adjuster Knob  
Joint Plate  
Support  
Lock  
Torsion Spring  
Bushing  
Nut  
Soft Grip Sleeve  
O-Ring (M65.4 X 2.5)  
End Cap  
Air Coupler  
REV 10a  
SKU 98751  
For technical questions, please call 1-800-444-3353.  
Page 16  
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1
2
3
4
5
Parts Diagram  
6
7
16  
8A  
9A  
10  
11  
12  
13  
14  
15  
14  
17  
18  
19  
20  
Some parts are listed and shown for  
illustration purposes only, and are not  
available individually as replacement parts.  
95  
92  
94  
93  
91  
7
46  
47  
62  
28  
63  
89  
90  
48  
49  
50  
51  
88  
86  
44  
45  
6
29  
30  
85  
84  
52  
53  
54  
55  
54  
56  
57  
83  
2
82  
87  
31  
32  
6
21  
22  
23  
24  
25  
26  
27  
80  
79  
83  
33  
34  
2
82  
60  
58  
36  
37  
81  
59  
61  
62  
35  
78  
38  
39  
63  
64  
68  
40  
63  
77  
39  
66  
64  
63  
76  
64  
75  
41  
65  
67  
63  
70  
71  
42  
43  
39  
69  
74  
73  
12  
63  
REV 10a  
SKU 98751  
For technical questions, please call 1-800-444-3353.  
Page 17  
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90 Day Warranty  
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability  
standards, and warrants to the original purchaser that this product is free from defects in materials  
and workmanship for the period of 90 days from the date of purchase. This warranty does not apply to  
damage due directly or indirectly, to misuse, abuse, negligence or accidents, repairs or alterations outside  
our facilities, criminal activity, improper installation, normal wear and tear, or to lack of maintenance. We  
shall in no event be liable for death, injuries to persons or property, or for incidental, contingent, special  
or consequential damages arising from the use of our product. Some states do not allow the exclusion  
or limitation of incidental or consequential damages, so the above limitation of exclusion may not apply  
to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR  
IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.  
To take advantage of this warranty, the product or part must be returned to us with transportation charges  
prepaid. Proof of purchase date and an explanation of the complaint must accompany the merchandise.  
If our inspection verifies the defect, we will either repair or replace the product at our election or we may  
elect to refund the purchase price if we cannot readily and quickly provide you with a replacement. We will  
return repaired products at our expense, but if we determine there is no defect, or that the defect resulted  
from causes not within the scope of our warranty, then you must bear the cost of returning the product.  
This warranty gives you specific legal rights and you may also have other rights which vary from state to  
state.  
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353  
Record Product’s Serial Number Here:  
Note: If product has no serial number, record month and year of purchase instead.  
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353  
REV 10a  
SKU 98751  
For technical questions, please call 1-800-444-3353.  
Page 18  
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