Harbor Freight Tools Air Compressor 91002 User Manual

®
1
/ ” STUBBY AIR RATCHET  
4
Model 91002  
OPERATING INSTRUCTIONS  
®
3491 Mission Oaks Blvd., Camarillo, CA 93011  
©
®
Copyright 2003 by Harbor FreightTools . 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.  
For technical questions and replacement parts, please call 1-800-444-3353  
 
8. Do not overreach. Keep proper footing and balance at all times. Do not reach over or  
across running machines or air hoses.  
9. Maintain tools with care. Keep tools clean for better and safer performance. Follow  
instructions for lubricating and changing accessories. Inspect tool cords and air hoses  
periodically and, if damaged, have them repaired by an authorized technician.The handles  
must be kept clean, dry, and free from oil and grease at all times.  
10. Disconnect air supply. Disconnect air hose when changing accessories or not in use.  
11. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches are  
removed from the tool or machine work surface before plugging it in.  
12. Avoid unintentional starting. Be sure the trigger is in the Off position when not in use  
and before plugging in. Do not carry any tool with your finger on the trigger, whether it is  
plugged in or not.  
13. Stay alert. Watch what you are doing, use common sense. Do not operate any tool  
when you are tired.  
14. Check for damaged parts. Before using any tool, any part that appears damaged  
should be carefully checked to determine that it will operate properly and perform its  
intended function. Check for alignment and binding of moving parts; any broken parts or  
mounting fixtures; and any other condition that may affect proper operation. Any part  
that is damaged should be properly repaired or replaced by a qualified technician. Do  
not use the tool if the trigger does not turn On and Off properly.  
15. Guard against electric shock. Prevent body contact with grounded surfaces such as  
pipes, radiators, ranges, and refrigerator enclosures.  
16. Replacement parts and accessories. When servicing, use only identical replacement  
parts. Use of any other parts will void the warranty. Only use accessories intended for  
use with this tool. Approved accessories are available from Harbor Freight Tools.  
17. Do not operate tool if under the influence of alcohol or drugs. Read warning labels  
if taking prescription medicine to determine if your judgement or reflexes are impaired  
while taking drugs. If there is any doubt, do not operate the tool.  
18. Use proper size and type extension cord. If an extension cord is required, it must be of  
the proper size and type to supply the correct current to the air compressor without  
heating up. Otherwise, the extension cord could melt and catch fire, or cause electrical  
damage to the air compressor. Check your air compressor’s manual for the appropriate  
size cord.  
19. Maintenance. For your safety, maintenance should be performed regularly by a qualified  
technician.  
20. Compressed air only. Never use combustible gas as a power source.  
21. Do not use a “cheater” or any other extension to increase torque on this tool.  
Do not exceed the maximum torque rating for this tool.  
Page 3  
SKU 91002  
 
NOTE:Performance of the compressor (if powered by line voltage) may vary  
depending on variations in local line voltage. Extension cord usage may  
also affect tool performance.  
WARNING: The warnings, cautions, and instructions discussed in this instruction  
manual cannot cover all possible conditions and situations that may occur.  
It must be understood by the operator that common sense and caution are  
factors which cannot be built into this product, but must be supplied by  
the operator.  
WARNING: The brass components of this product contain lead,a chemical known  
to the State of California to cause birth defects (or other reproductive harm).  
(California Health & Safety code 25249.5, et seq.)  
Unpacking  
When unpacking, check to make sure the parts listed on page 6 are included. If any  
parts are missing or broken, please call Harbor Freight Tools at the number on the cover of  
this manual as soon as possible.  
Operation  
1/4” - 18 NPT  
Ratchet  
For best service you should incorporate an oiler, regulator, and inline  
filter, as shown in the diagram above. Hoses, couplers, oilers, regulators, and  
filters are all available at Harbor Freight Tools.  
1.  
You will need to prepare a 1/4” air connector (sold separately) to connect to the air inlet  
on the Ratchet. First, wrap the 1/4” air connector (not included) with pipe thread seal  
tape before threading it into the Air Inlet (11). Connect the 3/8” ID Air Source Hose to  
the Ratchet.  
Note: If you are not using an automatic oiler system, before operation, add a few drops of  
Pneumatic Tool Oil to the airline connection. Add a few drops more after each hour of  
continual use.  
2.  
Set the air pressure on your compressor to 90 PSI. Do not exceed the maximum air  
pressure of 90 PSI.  
3.  
Check the air connection for leaks. Disconnect the Ratchet from the air source.  
Page 4  
SKU 91002  
 
Operation (continued)  
Reverse Button (36)  
Air Inlet (11)  
1/4” Anvil (39)  
Trigger (12)  
Trigger Pivot Area  
Warning! Disconnect the Ratchet from the air source when attaching and  
removing sockets (not included). There is no safety lock mechanism  
on this tool; always disconnect from the air source when not in use.  
Refer to the photograph above.  
1.  
2.  
3.  
Attach a socket (not included) to the 1/4” Anvil.  
By following the directions on page 4, attach the Ratchet to the air source hose.  
Gently squeeze the Trigger (12) to activate the Ratchet. Do not force the unit; allow it to  
do the work for you. To change direction (loosen vs. tighten), stop the tool, move it  
away from the workpiece, then turn the Reverse Button (36).  
4.  
5.  
To adjust the torque, readjust the air pressure. Do not exceed the maximum air pressure  
of 90 PSI.  
When you are finished working, turn off the compressor and disconnect the air source  
hose.  
Warning! There may still be air in the Ratchet. Squeeze the Trigger (12) and activate the  
Ratchet to expel any air still inside the tool.  
6.  
Remove the socket (not included).  
Maintenance  
Warning! Always disconnect the Ratchet from the air source hose before attempting any  
maintenance.  
1.  
2.  
3.  
Wipe the unit down with a lint free cloth.  
Periodically apply a high grade, light machine oil to the Trigger Pivot area (see above).  
Make sure the 1/4” Anvil (39), the Air Inlet (11), and the Reverse Button (36) are clear  
of grease, dirt, and debris.  
Page 5  
SKU 91002  
 
Parts List  
Part No.  
1
2
3
4
5
6
7
8
Description  
Motor Housing  
Valve Bushing  
O-ring  
Throttle Valve  
O-ring  
Spring  
O-ring  
Valve Screw  
Pin  
Exhaust Sleeve  
Air Inlet  
Trigger  
Pin  
Bearing  
Rear End Plate  
Pin  
Cylinder  
Rotor  
Rotor Blade  
Rotor Collar  
Front End Plate  
Roll Pin  
Part No.  
Description  
Planet Gear  
Planet Pin  
Gear Cage  
External Gear  
Clamp Nut  
Ratchet Housing  
Needle Bearing  
Crankshaft  
Drive Bushing  
Ratchet Yoke  
Washer  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
Pin  
Reverse Button  
Reverse Spring  
Reverse Pin  
1/4” Anvil  
Ratchet Pawl  
Pin  
Spring  
Steel Ball  
Thrust Washer  
Retaining Ring  
Bearing  
PLEASE READTHE FOLLOWING CAREFULLY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDEDTHE PARTS DIAGRAM INTHIS  
MANUAL AS A REFERENCETOOL ONLY. NEITHERTHE MANUFACTURER NOR 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 STATESTHAT ALL REPAIRS AND PARTS REPLACEMENTS  
SHOULD BE UNDERTAKEN BY CERTIFIED 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 PARTSTHERETO.  
NOTE: Some parts are listed and shown for illustration purposes only and are not available  
individually as replacement parts.  
Page 6  
SKU 91002  
 
Assembly Drawing  
24  
10  
34  
25  
35  
26  
36  
39  
27  
37  
44  
38  
28  
11  
45  
40  
29  
7
41  
12  
42  
13  
43  
30  
1
31  
32  
14  
2
3
4
33  
15  
16  
17  
5
6
7
8
18  
16  
21  
23  
19  
9
20  
22  
Page 7  
SKU 91002  
 
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  
 

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