Harbor Freight Tools 91002 User Manual

®

®

1

/4” STUBBY AIR RATCHET

Model 91002

OPERATING INSTRUCTIONS

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at http://www.harborfreight.com

Copyright© 2003 by Harbor F reight 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.

For technical questions and replacement parts, please call 1-800-444-3353

Specifications

Maximum Torque 20 Ft. Lbs.
Air Consumption 3.5 CFM
Drive Size 1/4” Square
Air Inlet 1/4” - 18 NPT
Maximum Air Pressure 90 PSI
Rotation Speed 280 RPM
Weight 1.2 Lbs.

Save This Manual

You will need the manual for the safety warnings and precautions,
operating and maintenance procedures, parts list and diagram. Keep your inv oice
with this manual. Write the inv oice number on the inside of the front cover . K eep
the manual and invoice in a safe and dry place for future reference.

Safety Warnings and Precautions

WARNING: When using tool, basic safety precautions should always be followed to
reduce the risk of personal injury and damage to equipment.

Read all instructions before using this tool!

1. Keep work area clean. Cluttered areas invite injuries.

2. Observe work area conditions. Do not use machines or power tools in damp or wet
locations. Don’t e xpose to rain. K eep work area well lit. Do not use electrically powered
tools in the presence of flammable gases or liquids.

3. Keep children awa y. Children must ne v er be allow ed in the work area. Do not let them
handle machines, tools, extension cords, or air hoses.

4. Store idle equipment. When not in use, tools must be stored in a dry location to inhibit
rust. Always lock up tools and k eep out of reach of children.

5. Use the right tool for the job. Do not attempt to f orce a small tool or attachment to do
the work of a larger industrial tool. There are certain applications for which this tool was
designed. It will do the job better and more safely at the rate for which it was intended.
Do not modify this tool and do not use this tool for a purpose for which it was not intended.

6. Dress properly. Do not wear loose clothing or jew elry as they can be caught in moving
parts. Protective, electrically non-conductive clothes and non-skid footwear are
recommended when working. Wear restrictive hair covering to contain long hair.

7. Use eye and ear protection. Always wear ANSI approved impact saf ety goggles. W ear
a full face shield if you are producing metal filings or w ood chips. Wear an ANSI appro ved
dust mask or respirator when working around metal, wood, and chemical dusts and
mists.

SKU 91002

Page 2

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 f or alignment and binding of moving parts; an y broken parts or
mounting fixtures; and any other condition that may affect proper operation. Any par t
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 e xtension 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 man ual for the appropriate
size cord.

19. Maintenance. F or your safety, maintenance should be performed regularly by a qualified
technician.

20. Compressed air only. Nev er use comb ustible 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.

SKU 91002

Page 3

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 ma y occur.
It must be understood b y the operator that common sense and caution are
factors which cannot be built into this product, but must be supplied by
the operator.

W ARNING: 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

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 availab le 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.

1/4” - 18 NPT

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.

SKU 91002

Page 4

Air Inlet (11)

Operation (continued)

Reverse Button (36)

Tr igger Pivot Area

Tr igger (12)

1/4” Anvil (39)

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. Attach a socket (not included) to the 1/4” Anvil.

2. By following the directions on page 4, attach the Ratchet to the air source hose.

3 . Gently squeeze the Trigger (12) to activate the Ratchet. Do not f orce the unit; allo w 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 . T o adjust the torque, readjust the air pressure. Do not exceed the maximum air pressure

of 90 PSI.

5 . 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 Tr igger (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. Wipe the unit down with a lint free cloth.

2 . P eriodically apply a high grade, light machine oil to the T rigger Piv ot area (see abov e).

3. Make sure the 1/4” An vil (39), the Air Inlet (11), and the Reverse Button (36) are clear
of grease, dirt, and debris.

SKU 91002

Page 5

Parts List

Part No. Description Part No. Description
1 Motor Housing 24 Planet Gear
2 Valve Bushing 25 Planet Pin
3 O-ring 26 Gear Cage
4 Throttle Valve 27 External Gear
5 O-ring 28 Clamp Nut
6 Spring 29 Ratchet Housing
7 O-ring 30 Needle Bearing
8 Valve Screw 31 Crankshaft
9 Pin 32 Drive Bushing
10 Exhaust Sleeve 33 Ratchet Yoke
11 Air Inlet 34 Washer
12 Trigger 35 Pin
13 Pin 36 Reverse Button
14 Bearing 37 Reverse Spring
15 Rear End Plate 38 Reverse Pin
16 Pin 39 1/4” Anvil
17 Cylinder 40 Ratchet Pawl
18 Rotor 41 Pin
19 Rotor Blade 42 Spring
20 Rotor Collar 4 3 Steel Ball
21 Front End Plate 44 Thrust Washer
22 Roll Pin 45 Retaining Ring
23 Bearing

THE MANUF ACTURER AND/OR DISTRIBUT OR HAS PRO VIDED THE PARTS DIAGRAM IN THIS
MANUAL AS A REFERENCE TOOL ONLY . NEITHER THE MANUF ACTURER 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 STATES THAT ALL REP AIRS AND P AR TS REPLACEMENTS
SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS AND NO T BY THE
BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER
REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT P ARTS THERETO , OR ARISING
OUT OF HIS OR HER INST ALLATION OF REPLACEMENT PARTS THERET O.

NOTE: Some parts are listed and shown for illustration purposes only and are not available
individually as replacement parts.

SKU 91002

PLEASE READ THE FOLLOWING CAREFULLY

Page 6

Assembly Drawing

33

23

32

45

21

31

16

44

43

42

20

39

18

30

36

41

17

35

19

34

40
29

16

37

15

38

14

28

24

25

26

27

11

10

12

13

1

2

3

4

5

6

7

8

9

7

SKU 91002

22

Page 7

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 veries 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 specic 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 • [phone]