Harbor Freight Tools Air Compressor 93874 User Manual

AIR COMPRESSOR  
6 HP - 8 GALLON CAPACITY  
Model 93874  
ASSEMBLY AND OPERATING INSTRUCTIONS  
Do to continuing improvements,  
actual product may differ slightly  
from the product described herein.  
WARNING!  
Your Warranty Is Voided If:  
A. You do not put compressor oil in the Compressor’s crankcase prior to its first use.  
Before each use, check the oil level. Never run the Compressor with low or no compres-  
sor oil. Running the Compressor with low or no oil will permanently damage the unit.  
B. You do not put engine oil in the Engine’s crankcase prior to its first use.  
Before each use, check the oil level. Never run the Engine with low or no engine oil.  
Running the Compressor with low or no oil will permanently damage the unit.  
C. You drop the Air Compressor.  
Always lift the Air Compressor using its Handle.  
®
3491 Mission Oaks Blvd., Camarillo, CA 93011  
TO PREVENT SERIOUS INJURY,  
READ AND UNDERSTAND ALL WARNINGS  
AND INSTRUCTIONS BEFORE USE.  
©
Copyright 2006 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 FreightTools.  
For technical questions, please call 1-800-444-3353.  
 
3.  
1.  
Keep bystanders, children, and visitors away while operating a power tool.  
Distractions can cause you to lose control. Protect others in the work area from  
debris such as chips and sparks. Provide barriers or shields as needed.  
PERSONAL SAFETY  
Stay alert. Watch what you are doing, and use common sense when oper-  
ating a power tool. Do not use a power tool while tired or under the influ-  
ence of drugs, alcohol, or medication. A moment of inattention while operat-  
ing power tools may result in serious personal injury.  
2.  
3.  
4.  
Dress properly. Do not wear loose clothing or jewelry. Contain long hair.  
Keep your hair, clothing, and gloves away from moving parts. Loose  
clothes, jewelry, or long hair can be caught in moving parts.  
Avoid accidental starting. Be sure the Gasoline Engine’s Power Switch is  
in itsOFFposition before moving the Compressor and before performing  
any service, maintenance, or cleaning procedures on the unit.  
Remove adjusting keys or wrenches before turning the Compressor on. A  
wrench or a key that is left attached to a rotating part of the machine may result  
in personal injury.  
5.  
6.  
Do not overreach. Keep proper footing and balance at all times. Proper  
footing and balance enables better control of the power tool in unexpected  
situations.  
Use safety equipment. Always wear eye protection. Always wear  
ANSI approved safety impact goggles when using this product. ANSI  
approved hearing protection must also be used.  
TOOL USE AND CARE  
1.  
2.  
Do not force the tool. Use the correct tool for your application. The correct  
tool will do the job better and safer at the rate for which it is designed.  
Do not use the Compressor if the Gasoline Engine’s Power Switch does not  
turn it on or off. Any tool that cannot be controlled with its power switch is  
dangerous and must be replaced.  
3.  
4.  
Store idle tools out of reach of children and other untrained persons. Tools  
are dangerous in the hands of untrained users.  
Maintain tools with care. Properly maintained tools with a sharp cutting edge  
are less likely to bind and are easier to control. Do not use a damaged tool. Tag  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 3  
 
damaged tools “Do not use” until repaired.  
5.  
6.  
Check for misalignment or binding of moving parts, breakage of parts, and  
any other condition that may affect the tool’s operation. If damaged, have  
the tool serviced before using. Many accidents are caused by poorly main-  
tained tools.  
Use only accessories that are recommended by the manufacturer for your  
model. Accessories that may be suitable for one tool may become hazardous  
when used on another tool.  
SERVICE  
1.  
2.  
Tool service must be performed only by qualified repair personnel. Service  
or maintenance performed by unqualified personnel could result in a risk of injury.  
When servicing a tool, use only identical replacement parts. Follow  
instructions in the “Inspection, Maintenance, And Cleaningsection of this  
manual. Use of unauthorized parts or failure to follow maintenance instructions  
may create a risk of electric shock or injury.  
SPECIFIC SAFETY RULES AND PRECAUTIONS  
1.  
WARNING! Your Warranty is voided if:  
A. You do not put compressor oil in the Compressor’s crankcase prior to its  
first use. Before each use, check the oil level. Never run the Compressor with  
low or no compressor oil. Running the Compressor with low or no oil will perma-  
nently damage the unit.  
B. You do not put engine oil in the Engine’s crankcase prior to its first use.  
Before each use, check the oil level. Never run the Engine with low or no engine  
oil. Running the Engine with low or no oil will permanently damage the unit.  
C. You drop the Air Compressor. Always lift and lower the Air Compressor using  
its Handle.  
2.  
3.  
Maintain labels and nameplates on the Air Compressor. These carry important  
information. If unreadable or missing, contact Harbor Freight Tools for a replace-  
ment.  
DANGER! This Air Compressor is NOT equipped and should not be used  
“as-is” to supply breathing quality air. For any application of air for human consump-  
tion, you must fit the Air Compressor with suitable inline safety, alarm equipment,  
and other safety equipment (not included). This additional equipment is necessary  
to properly filter and purify the air to meet minimal specifications for Grade D breath-  
ing as described in Compressed Gas Association Commodity Specification G 7.1-  
1966, OSHA 29 CFR 1910. 134, and/or Canadian Standards Associations (CSA).  
In the event the Air Compressor is used for the purpose of breathing air application  
and proper in-line safety and alarm equipment is not simultaneously used, existing  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 4  
 
warranties are void, and Harbor Freight Tools disclaims any liability whatsoever for  
any loss, personal injury, or damage.  
4.  
5.  
DANGER! Never attempt to repair or modify the Tanks (12). Welding, drilling,  
or any other modification will weaken the Tanks resulting in damage from rupture or  
explosion. Always replace worn, cracked, or damaged Tanks.  
WARNING! Never use plastic (PVC) pipe for compressed air. Serious injury or  
death could result. Any tube, pipe, or hose used must have a pressure rating higher  
than 150 PSI. Minimum recommended pipe size: Up to 50 feet long use 1/2” diam-  
eter. Greater than 50 feet use 3/4” diameter. Larger diameter pipe is always better.  
6.  
7.  
Make sure all tools and equipment used with the Air Compressor are rated to  
the appropriate capacity. Do not exceed the capacity for any tool or equipment.  
Always start out with the regulator adjusted all the way down, and then gradually  
bring the pressure up to the proper level.  
Drain the Air Compressor every day. Do not allow excessive moisture to build up  
inside the Air Compressor’s Tank. Do not open the Drain Plugs (25) with more than  
10 PSI of air pressure in the Tank. Do not unscrew the Drain Plugs so that more  
than four threads are showing.  
8.  
Avoid injury. Never direct the air output at people or animals.  
9.  
Do not alter or remove the Pressure Release Valves (9, 33).  
10.  
Make sure the Air Compressor is located on a flat, level, sturdy surface ca-  
pable of supporting the weight of the Compressor, operator(s), and any addi-  
tional tools and equipment.  
11.  
12.  
Industrial applications must follow OSHA guidelines.  
Never stand on the Air Compressor. Serious injury could result if the Compres-  
sor is tipped.  
13.  
14.  
15.  
16.  
Never leave the Air Compressor unattended when it is plugged in and run-  
ning. Turn off the Compressor, and unplug the unit before leaving.  
Do not allow children and other unauthorized people to handle or play with  
the Air Compressor.  
Do not move or transport the Compressor if the Tanks (12) are under pres-  
sure.  
This Compressor is designed for outdoor use only. Do not operate the Com-  
pressor in a closed area or in a poorly ventilated area. When running, the Engine  
of this Compressor produces carbon monoxide, a colorless, odorless, toxic  
fume that, when inhaled, can cause serious personal injury or death. When-  
ever possible, use a carbon monoxide detector (not included) to detect ex-  
cessive carbon monoxide fumes in the work area and in the surrounding area.  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 5  
 
17.  
18.  
Do not force the Compressor. This tool will do the work better and safer at the  
speed and capacity for which it was designed.  
To extend the life of your tools and equipment, it is recommended that you install  
an oiler and water filter inline with the air output line of the Air Compressor.  
(See Figure A.)  
REGULATOR  
OILER  
WATER  
FILTER  
FIGURE A  
FIRE AND EXPLOSION PRECAUTIONS  
1.  
Gasoline fuel and fumes are flammable, and potentially explosive. Use  
proper fuel storage and handling procedures. Always have multiple ABC class  
fire extinguishers nearby.  
2.  
3.  
Keep the Compressor and surrounding areas clean at all times.  
When spills of fuel or oil occur, they must be cleaned up immediately. Dis-  
pose of fluids and cleaning materials as per any local, state, or federal codes and  
regulations. Store oil rags in a covered metal container.  
4.  
5.  
Never store fuel or other flammable materials near the Compressor.  
Do not smoke, or allow sparks, flames, or other sources of ignition around  
the Compressor.  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 6  
 
6.  
Keep grounded conductive objects, such as tools, away from exposed, live  
electrical parts and connections to avoid sparking or arcing. These events  
could ignite fumes or vapors.  
7.  
8.  
Do not refill the Fuel Tank while the Engine is running or while the Engine is  
still hot. Do not operate the Compressor with known leaks in the fuel system.  
Use only Engine manufacturer recommended fuel and oil.  
MECHANICAL PRECAUTIONS  
1.  
Prior to performing service, maintenance, or cleaning procedures, always  
make sure the Gasoline Engine’s Power Switch is in its “OFF” position.  
Allow the Engine and Compressor to completely cool. Then, remove the  
spark plug from the Engine.  
2.  
3.  
Do not alter or adjust any part of the Compressor or Engine that is as-  
sembled and supplied by the manufacturer.  
Always follow and complete scheduled Compressor and Engine mainte-  
nance.  
CHEMICAL PRECAUTIONS  
1.  
2.  
Avoid contact with hot fuel, oil, exhaust fumes, and solid surfaces.  
Avoid body contact with fuels, oils, and lubricants used in the Compressor  
and Engine. If swallowed, seek medical treatment immediately. Do not induce  
vomiting if fuel is swallowed. For skin contact, immediately wash with soap and  
water. For eye contact, immediately flush eyes with clean water.  
NOISE PRECAUTIONS  
1.  
1.  
Prolonged exposure to noise levels above 85 dBA is hazardous to hearing.  
Always wear ANSI approved hearing protection when operating or working  
around the Compressor when it is running.  
MISC. PRECAUTIONS  
WARNING! This product contains brass, which is a chemical known to the  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 7  
 
State of California to cause cancer and birth defects and other reproductive  
harm. (California Health & Safety Code 25249.5, et seq.)  
2.  
3.  
WARNING! People with pacemakers should consult their physician(s)  
before using this product. Operation of electrical equipment in close proximity to  
a heart pacemaker could cause interference to or failure of the pacemaker.  
WARNING! The warnings and precautions discussed 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.  
UNPACKING  
When unpacking, check to make sure all the parts shown on the Parts List on page 16  
are included. If any parts are missing or broken, please call Harbor Freight Tools at the  
number shown on the cover of this manual as soon as possible.  
PRE-OPERATING INSTRUCTIONS  
CAUTION! Always make sure the Gasoline Engine’s Power Switch is in its  
“OFF” position prior to performing any service, maintenance, or cleaning of the  
Compressor or Engine.  
To Add Engine Oil:  
1.  
IMPORTANT! Prior to first using the Compressor, the Engine MUST be filled  
with a high quality 10W-30 grade engine oil.  
(See Engine manufacturer’s manual for complete instructions.)  
2.  
3.  
To do so, unscrew and remove the Engine Oil Dipstick. Pour approximately 3/4  
quart of engine oil into the Dipstick Hole. Do not overfill.  
Clean the Oil Dipstick. Then screw the Dipstick fully back into the Dipstick Hole.  
Unscrew and remove the Oil Dipstick again, and observe the level of engine oil  
on the Dipstick. The oil level should appear between the “MINIMUM” and “MAXI-  
MUM” indicator marks on the Oil Dipstick.  
4.  
5.  
If necessary, continue adding engine oil, while rechecking the Oil Dipstick, until  
the oil level reaches the “MAXIMUM” indicator on the Oil Dipstick.  
Do not exceed the “MAXIMUM” indicator mark on the Oil Dipstick.  
When finished adding engine oil, carefully screw the Oil Dipstick back into the  
Dipstick Hole.  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 8  
 
To Add Compressor Oil:  
1.  
2.  
3.  
4.  
IMPORTANT! Prior to first using the Compressor, the Compressor MUST be  
filled with a high quality 30 weight, non-detergent, compressor oil.  
(See Figure B.)  
To do so, remove the red plastic plug that is covering the oil fill hole. That plastic  
plug is only used for shipping purposes. Pour approximately 1/2 quart of compres-  
sor oil into the Compressor Oil Plug Hole. Do not overfill. (See Figure B.)  
Observe the level of compressor oil through the Compressor’s Oil Level Sight  
Glass (21A). The oil level should be maintained at the center dot in the sight  
glass. (See Figure B.)  
If necessary, continue adding compressor oil, while rechecking the Compressor’s  
Oil Level Sight Glass (21A), until the oil level reaches the “MAXIMUM” mark on  
the Indicator. Do not exceed the “MAXIMUM” indicator mark on the Oil Level  
Sight Glass. (See Figure B.)  
5.  
When finished adding compressor oil, install the Oil Breather Plug (37A) into the  
Compressor Oil Plug Hole. The Oil Breather Plug is press-fitted in with the flat  
edge of the plug facing the cylinder. The large O-rings on top serve as a grip when  
removing it. (See Figure B.)  
FIGURE B  
OIL BREATHER PLUG (37A)  
FILL LEVEL  
flat  
edge  
OIL LEVEL SIGHT GLASS (21A)  
To Fill The Fuel Tank:  
1.  
Prior to first using the Compressor, the Engine’s Fuel Tank MUST be filled with  
unleaded gasoline. (See Engine manufacturer’s manual.)  
2.  
To do so, remove the Fuel Tank Cap and fill the Fuel Tank with unleaded gaso-  
line. Then, replace the Fuel Tank Cap. Thereafter, check the Fuel Tank for the  
amount of unleaded gasoline. When necessary, refill the Fuel Tank.  
(See Engine manufacturer’s manual.)  
07e  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 9  
 
To Install A Quick Coupler:  
1.  
Prior to use, the Air Compressor requires the attachment of a Quick Coupler (not  
included) to its Pressure Regulator (29). To do so, make sure the screen Air  
Filter within the Pressure Regulator is properly seated. Wrap approximately 3” of  
Pipe Thread Seal Tape (not included) around the male threads of the Quick  
Coupler. Then, firmly tighten the Quick Coupler into the Pressure Regulator.  
(See Figure C.)  
QUICK COUPLER  
(NOT INCLUDED)  
PRESSURE REGULATOR  
(29)  
FIGURE C  
OPERATING INSTRUCTIONS  
To Start The Compressor:  
1.  
Check to make sure the Air Tank’s two Drain Plugs (25), located at the bottom of  
the Air Tanks (12), are fully closed. Check oil level for both the compressor and  
the engine. (See Figure D.)  
END VIEW  
FIGURE D  
DRAIN PLUG  
(25)  
DRAIN PLUG  
(25)  
SKU 93874  
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Page 10  
 
2.  
3.  
Turn the Tool Pressure Regulator (29) counterclockwise completely.  
(See Figure E.)  
Connect an air hose (not included) to the previously installed Quick Coupler. Then,  
connect the other end of the air hose to the tool or equipment being powered.  
(See Figure E.)  
4.  
5.  
6.  
7.  
8.  
Turn the Engine’s Power Switch to its “ON” position.  
(See Engine manufacturer’s manual.)  
Turn the Engine Choke to its “CHOKE” position.  
(See Engine manufacturer’s manual.)  
Pull the Starter Grip briskly one or more times until the Engine begins to run.  
(See Engine manufacturer’s manual.)  
Allow the Engine to run 3-5 minutes for the Engine to warm up. Then, turn the  
Engine Choke to its “RUN” position. (See Engine manufacturer’s manual.)  
NOTE: The Compressor will automatically run while the air pressure is less than  
145 PSI as indicated by the Tank Pressure Gauge (46). When the maximum air  
pressure (145 PSI) is reached, the Engine will automatically switch to idle and the  
Compressor will stop operating. The Compressor and Engine will automatically  
restart when the air pressure falls below 105 PSI. (See Figure E.)  
9.  
Connect the tool and air hose to the quick coupler. Once the Tank Pressure Gauge  
(46) reaches at least 105 PSI, gradually turn theTool Pressure Regulator (29) clock-  
wise until the lowest working air pressure for any attached piece of equipment is  
reached as indicated by the Tool Pressure Gauge (55). (See Figure E.)  
Warning: NEVER exceed the working air pressure of any tool or equipment at  
any time. Always start the compressor with the regulator adjusted to its lowest  
setting to prevent tool damage or explosion, resulting in PERSONAL INJURY.  
TOOL PRESSURE  
GAUGE  
FIGURE E  
(55)  
TANK PRESSURE  
GAUGE  
TOOL  
PRESSURE  
REGULATOR  
(29  
TOOL PRESSURE  
REGULATOR  
(29)  
(46)  
QUICK  
COUPLER  
(NOT INCLUDED)  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 11  
 
10.  
IMPORTANT: The Pressure Release Valve (9) is used when decompression is  
needed quickly and efficiently. To decompress the air pressure in the Tanks (12),  
turn the Tool Pressure Regulator (29) to its “OFF” position. Then, pull out on the  
Pressure Release Valve to immediately release air pressure from the Tanks.  
(See Figures E and F.)  
END VIEW  
PRESSURE RELEASE VALVE  
(9)  
FIGURE F  
To Stop The Compressor:  
1.  
2.  
3.  
4.  
5.  
Turn the Engine’s Power Switch to its “OFF” position.  
(See Engine manufacturer’s manual.)  
Wait for the Compressor to stop pumping air (at idle). Then, turn the Tool Pres-  
sure Regulator (29) counterclockwise to its “OFF” position. (See Figure E.)  
Allow the tool or equipment being powered to continue running until it has ex-  
pended any remaining compressed air in the tool/equipment and its air hose.  
Disconnect the air hose from the Quick Connector on the Compressor. Then,  
disconnect the air hose from the tool/equipment. (See Figure E.)  
Turn the Tool Pressure Regulator (29) clockwise to its “ON” position to release all  
air pressure from the Compressor’s Tanks (12). Then, turn the Tool Pressure  
Regulator counterclockwise to its “OFF” position. (See Figure E.)  
6.  
7.  
Remove any moisture in the Compressor’s Tanks (12) by opening the two Drain  
Plugs (25). Then, retighten the Drain Plugs. (See Figure D.)  
Allow the Air Compressor to completely cool. Then store the unit in a clean, dry,  
safe location out of reach of children and other unauthorized people.  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 12  
 
INSPECTION, MAINTENANCE, AND CLEANING  
1.  
2.  
WARNING! Make sure the Power Switch of the Engine is in its “OFF”  
position. Release all air pressure from the system and disconnect all tools and  
equipment from the Air Compressor before performing any inspection, mainte-  
nance, or cleaning procedures.  
Before each use, inspect the general condition of the Air Compressor. Check  
for loose screws, misalignment or binding of moving parts, cracked or broken  
parts, damaged electrical wiring, loose air fittings, and any other condition that  
may affect the safe operation of the Compressor. If abnormal noise or vibration  
occurs, have the problem corrected before further use.  
Do not use damaged equipment.  
3.  
Before each use, check the Engine oil level. If necessary, fill the crankcase of  
the Engine with the proper amount and type of engine oil. Refer to the Engine  
manufacturer’s manual for all inspection, maintenance, and cleaning in-  
structions.  
4.  
5.  
Before each use, check the Air Compressor oil level. If necessary, fill with a  
premium quality, 30-weight, non-detergent, compressor oil. (See Figure B.)  
Daily: Empty condensation from the Air Compressor’s Tanks (12). The Tanks  
should be emptied daily to release all trapped moisture that may cause Air Tank  
corrosion. Allow sufficient time for all of the condensation to escape from the  
Tanks. Then, firmly retighten the two Drain Plugs (25). (See Figure D.)  
6.  
Every 500 hours or 12 months, replace the old compressor oil with new, pre-  
mium quality, 30-weight, non-detergent, compressor oil. To do so, remove the  
Screw (36A) located at the base of the Air Compressor. Drain the old oil into a  
proper container. Then, refill the Air Compressor with new oil. (See Figure B.)  
7.  
To replace the V-Belt: Unscrew and remove the six Screws (21) that hold the  
front Belt Guard (13) section to the rear Belt Guard section. Then, remove the  
BELT GUARD (13)  
SCREW (21)  
SCREW (21)  
SCREW (21)  
SCREW (21)  
FIGURE G  
SKU 93874  
SCREW (21)  
For technical questions, please call 1-800-444-3353.  
Page 13  
 
front Belt Guard section. Loosen the four Screws (31) at the base of the Engine.  
Slide the Engine toward the Air Compressor to loosen tension on the V-Belt (44).  
Remove the old V-Belt from the Flywheel (39A) and Pulley (37). Install the new  
V-Belt (A47/13 x 11.94) on the Flywheel and Pulley. Then reinstall the front Belt  
Guard section and secure in place with the six Screws previously removed. (See  
Figure G and Assy. Diagram.)  
8.  
9.  
NOTE: Always dispose of old Engine oil and old Air Compressor oil in accor-  
dance with local, state, and federal regulations.  
CAUTION! All maintenance, service, or repairs not mentioned in this  
manual must only be performed by a qualified service technician.  
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. NEI-  
THER THE MANUFACTURER OR DISTRIBUTOR MAKES ANY REPRESENTATION OR  
WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO  
REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR  
DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACE-  
MENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSEDTECHNICIANS,  
AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISKS AND LIABILITY ARIS-  
ING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACE-  
MENT PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF  
REPLACEMENT PARTSTHERETO.  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 14  
 
TROUBLESHOOTING - COMPRESSOR  
Replace Valve  
Cannot reach  
maximum air  
pressure point  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 15  
 
PARTS LIST  
Part #  
1
2
3
4
5
6
7
Description  
Screw (M8 x 40)  
Lock Nut (M6)  
Lock Nut (M8)  
Pneumatic Accelerator  
Wheel  
Wheel Pin  
Inlet Tube  
Tube  
Pressure Release Valve  
Screw (M8 x 40)  
Belt Guard Wedge  
Tank  
Belt Guard  
Lock Nut  
Qty.  
2
2
4
1
1
1
1
1
1
4
6
1
1
4
4
4
4
4
4
4
8
1
8
1
1
1
1
2
1
Part #  
30  
Description  
Hose Clamp  
Screw (M8 x 45)  
Joint  
Pressure Release Valve  
Washer (#8)  
Screw  
Washer (#24)  
Pulley (#145)  
Screw (M6 x 50)  
Screw (M8 x 16)  
Belt Guard Support  
Spacer  
Gasoline Engine  
Pumping Unit  
Belt (A47)  
Belt Guard Plate  
Tank Pressure Gauge  
Joint  
Support  
Hose Tail Fitting  
Joint  
Qty.  
2
4
2
1
4
1
1
1
1
1
1
1
1
1
1
1
2
2
1
2
1
1
1
2
1
1
2
4
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
58  
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
Washer (#6)  
Rubber Foot  
Washer (#6 x 18 x 1.5)  
Screw (M6 x 35)  
Washer (#6)  
Nut (M6)  
Screw (M5 x 12)  
Screw (4.2 x 45)  
Washer (#6 x 18 x 1.5)  
Washer (#5)  
Drain Plug  
Rubber Handle  
Joint  
Joint  
Spacer  
Tap  
Joint  
Tool Pressure Gauge  
Handle  
Screw (M8 x 12)  
Rubber Hose  
Pressure Regulator  
PARTS LIST - CONT.  
Part #  
1A  
Description  
Crankcase  
Qty.  
1
Part #  
21A  
Description  
Oil Level Sight  
Glass  
Qty.  
1
2A  
Crankcase  
Cover  
1
22A  
“OR” Gasket  
1
3A  
4A  
5A  
6A  
7A  
8A  
9A  
10A  
11A  
12A  
13A  
14A  
15A  
16A  
17A  
17AA  
17B  
18A  
19A  
20A  
Screw  
4
1
1
1
1
1
1
1
1
6
1
2
2
2
2
2
2
4
1
4
23A  
24A  
25A  
26A  
27A  
28A  
29A  
30A  
31A  
32A  
33A  
34A  
35A  
36A  
37A  
38A  
39A  
40A  
41A  
100A*  
Gasket  
Valve Plate  
Gasket  
Valve  
Gasket  
1
2
1
4
1
1
1
1
1
1
6
1
2
1
1
1
1
1
1
1
“OR” Gasket  
Crankshaft  
Bearing  
NOTE:  
Bearing  
Some parts are  
listed and shown  
for illustration  
purposes only,  
and are not  
available indi-  
vidually as  
Oil Seal  
Front Cover  
Rear Cover  
“OR” Gasket  
Screw  
Head  
Filter Plate  
Filter Element  
Intake Filter  
Screw  
Screw  
Air Conveyor  
Screw  
Screw  
Oil Breather Plug  
Washer  
Flywheel  
Screw  
Star Washer  
Gasket Set  
Key  
Connection Rod  
Piston Pin  
Piston  
Piston Ring  
Piston Ring  
Piston Ring  
Seeger  
replacement  
parts.  
Cylinder  
Screw  
*Parts #23A, #24A, #25A, & #26A must be ordered  
as a complete set: #100A Gasket Set.  
07e  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 16  
 
ASSEMBLY DIAGRAM  
NOTE:  
Some parts are listed and shown for illustration purposes only,  
and are not available individually as replacement parts.  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 17  
 
ASSEMBLY DIAGRAM - CONT.  
35A  
33A  
34A  
28A  
27A  
29A  
30A  
24A  
31A  
32A  
25A  
26A  
24A  
100A  
26A  
23A  
17A  
17AA  
17B  
17A  
17AA  
17B  
18A  
15A  
16A  
39A  
16A  
15A  
40A  
41A  
38A  
18A  
18A  
14A  
14A  
12A  
10A  
8A  
19A  
20A  
7A  
13A  
5A  
22A  
1A  
37A  
6A  
11A  
4A  
2A  
9A  
12A  
36A  
21A  
3A  
NOTE:  
Some parts are listed and shown for illustration  
purposes only, and are not available individually as replacement parts.  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 18  
 
LIMITED 2YEAR  
WARRANTY  
Harbor FreightTools 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 two years from date of purchase (90 days if used by a professional contractoror if used as rental  
equipment). See engine manufacturer’s warranty which covers engine.  
This warranty does not apply to damage due directly or indirectly, to misuse, abuse, negligence or accidents,  
repairs or alterations outside our facilities, 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  
SKU 93874  
For technical questions, please call 1-800-444-3353.  
Page 19  
 

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