Harbor Freight Tools 93821 User Manual

1/4” MINI RATCHET WRENCH

Model

93821

SET UP AND OPERATING INSTRUCTIONS

Diagrams within this manual may not be drawn proportionally.

Due to continuing improvements, actual product may differ slightly from the product described herein.

Distributed exclusively by Harbor Freight Tools®.

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our website at: http://www.harborfreight.com

Read this material before using this product.

Failure to do so can result in serious injury.
SAVE THIS MANUAL.

Copyright© 2007 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.

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

Rev 07k

PRODUCT SPECIFICATIONS

Drive Size 1/4” Square Drive

Max. Working Pressure 90 PSI

Minimum Air Consumption Required 14.5 SCFM @ 90 PSI

Free Speed RPM 300 Max. RPM

Torque 20 ft./lb.

Air Inlet Size 1/4” - 18 NPT

Required Air Hose I.D. 3/8”

Exhaust Type Rear Exhaust

Overall Length 5” L

Unit Weight .85 lb.

UNPACKING

When unpacking, check to make sure the product is intact and undamaged. 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.

SAVE THIS MANUAL

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

GENERAL SAFETY RULES

WARNING!

READ AND UNDERSTAND ALL INSTRUCTIONS

Failure to follow all instructions listed in the following

pages may result in electric shock, fire, and/or serious injury.

SAVE THESE INSTRUCTIONS

SKU 93821 For technical questions, please call 1-800-444-3353 PAGE 2

WORK AREA

1. Keep your work area clean and well lit. Cluttered benches and dark areas
invite accidents.

2. Do not operate pneumatic tools in explosive atmospheres, such as in the
presence of flammable liquids, gases, or dust. Pneumatic tools create sparks
which may ignite flammables.

3. Keep bystanders, children, and visitors away while operating a pneumatic
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

1. Stay alert. Watch what you are doing, and use common sense when

operating a pneumatic tool. Do not use a pneumatic tool while tired or
under the influence of drugs, alcohol, or medication. A moment of

inattention while operating pneumatic tools may result in serious personal injury.

2. 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.

3. Avoid accidental starting. Be sure the Throttle Lever (11) is off before
connecting to the air supply. Carrying pneumatic tools with your finger on the
Throttle Lever, or connecting pneumatic tools to the air supply with the Throttle
Lever on, invites accidents.

4. Remove adjusting keys or wrenches before turning on the tool. A wrench
or a key that is left attached to a rotating part of the tool may result in personal
injury.

5. Do not overreach. Keep proper footing and balance at all times. Proper
footing and balance enables better control of the tool in unexpected situations.

6. Use safety equipment. Always wear ANSI approved safety impact eye

goggles, hearing protection, and heavy duty work gloves.

TOOL USE AND CARE

1. Use clamps or other practical ways to secure and support the workpiece to
a stable platform. Holding the work by hand is unstable and may lead to loss of

control. Only work on a workpiece that is properly secured.

SKU 93821 For technical questions, please call 1-800-444-3353 PAGE 3

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.

3. Do not use the power tool if the Throttle Lever does not turn it on or off.
Any tool that cannot be controlled with the Throttle Lever is dangerous and must
be replaced.

4. Disconnect the air hose from the tool before making any adjustments,
changing accessories, or storing the tool. Such preventive safety measures
reduce the risk of starting the tool accidentally.

5. Store idle tools out of reach of children and other untrained persons. Tools
are dangerous in the hands of untrained users.

6. Maintain tools with care. Do not use a damaged tool. Tag damaged tools “Do
not use” until repaired.

7. 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

maintained tools.

8. 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. Tool service must be performed only by qualified repair personnel. Service
or maintenance performed by unqualified personnel could result in a risk of injury.

2. When servicing a tool, use only identical replacement parts. Follow

instructions in the “Inspection, Maintenance, And Cleaning” section of this
manual. Use of unauthorized parts or failure to follow maintenance instructions

may create a risk of injury.

SPECIFIC SAFETY RULES

1. Maintain labels and nameplates on the Ratchet Wrench. These carry
important information. If unreadable or missing, contact Harbor Freight Tools for
a replacement.

2. CAUTION! To avoid injury, grip the Ratchet Wrench firmly with both hands.

SKU 93821 For technical questions, please call 1-800-444-3353 PAGE 4

3. Use clean, dry, regulated, compressed air at 90 PSI. Do not exceed the
recommended 90 PSI. Never use oxygen, carbon dioxide, combustible gases, or
any other bottled gas as a power source for this tool.

4. When connecting to the air supply: Prior to each use, if an automatic oiler is
not used, add two drops of air tool oil (not included) into the Air Inlet (10) fitting of
the Ratchet Wrench.

5. Always disconnect the Ratchet Wrench from its compressed air supply

source, and squeeze the Throttle Lever (11) to release all compressed air in
the tool before performing any maintenance or services.

6. Industrial applications must follow OSHA requirements.

7. 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.)

8. WARNING! The warnings, precautions, and instructions discussed in this
manual cannot cover all possible conditions and situations that may occur. The
operator must understand that common sense and caution are factors which can­not be built into this product, but must be supplied by the operator.

ASSEMBLY AND OPERATING INSTRUCTIONS

NOTE:

For additional references to the parts listed in the

following pages, refer to the Assembly Diagram on page 9.

To Attach A Quick Connector:

1. Prior to use, the Ratchet Wrench requires the attachment of a Quick Connector

(not included) into its Air Inlet (10). To do so, wrap approximately 3” of pipe

thread sealer tape (not included) around the male threads of a Quick Connector.
Then, firmly tighten the Quick Connector into the Air Inlet. (See Figure A.)

SKU 93821 For technical questions, please call 1-800-444-3353 PAGE 5

Recommended Compressed Air System Set-Up:

1. For best service, you should incorporate an oiler, regulator, and inline filter when
using an air compressor (not included) to operate the Ratchet Wrench.

(See Figure B.)

RECOMMENDED COMPRESSED AIR SYSTEM SET-UP

ATTACH

QUICK CONNECTOR

TO RATCHET WRENCH

FIGURE B

To Operate The Ratchet Wrench:

1. The Ratchet Wrench is designed to work with all 1/4” drive sockets (not included).

Before installing a socket, make sure your hand is away from the Throttle Lever
(11). When installing a socket onto the Drive Head of the Ratchet Wrench,
always make sure the socket is firmly secured in the Drive Head.

(See Figure C, next page.)

2. After installing a socket onto the Drive Head of the Ratchet Wrench, set the

Forward/Reverse Knob (33) to the direction in which you wish the Ratchet to
turn (Forward = clockwise rotation / Reverse = counterclockwise rotation).

(See Figure C.)

3. Connect the air supply hose to the Ratchet Wrench. Turn on the air compressor,

and set its regulator to the recommended 90 PSI for the Ratchet Wrench.

4. Insert the socket onto the bolt or nut that is to be loosened/tightened.

5. Make sure to hold the Ratchet Wrench firmly with both hands, as torque will

cause the tool to twist. Then gently squeeze the Throttle Lever (11) to tighten
or loosen the bolt/nut. Apply additional pressure on the Throttle Lever (11) as
needed. (See Figure C.)

SKU 93821 For technical questions, please call 1-800-444-3353 PAGE 6

6. If necessary, use a torque wrench (not included) to verify the desired torque of
a bolt/nut. If a bolt/nut requires a higher torque level than that produced by the
Ratchet Wrench at 90 PSI, an alternate means (other than the Ratchet Wrench)
of achieving the desired torque should be used.

7. When finished, release the Throttle Lever (11) to stop the Ratchet Wrench.
(See Figure C.)

8. Turn off the air compressor. Disconnect the Ratchet Wrench from its air supply
hose, and remove the socket from the tool.

9. Make sure to store the Ratchet Wrench in a dry, clean, location out of reach of
children and other unauthorized users.

INSPECTION, MAINTENANCE, AND CLEANING

1. WARNING! Always make sure the Throttle Lever (11) is in its “OFF”
position, and disconnect the Ratchet Wrench from its compressed air supply
before performing any inspection, adjustments, maintenance, or cleaning.

2. Before each use, inspect the general condition of the Ratchet Wrench. Check
for loose screws, misalignment or binding of moving parts, cracked or broken
parts, damaged air hoses, and any other condition that may affect its safe
operation. If abnormal noise or vibration occurs, have the problem corrected
before further use. Do not use damaged equipment.

SKU 93821 For technical questions, please call 1-800-444-3353 PAGE 7

3. Daily: With a soft brush, cloth, or vacuum, remove all dust and debris from
the Ratchet Wrench. Then, use a premium quality, lightweight machine oil to
lubricate all external moving parts.

4. CAUTION! All maintenance, service, or repairs not listed in this manual are
only to be attempted 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. 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 THAT 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 PARTS THERETO.

PARTS LIST

Part # Description

1 Motor Housing
2 Valve Bushing
3 O Ring
4 O Ring
5 Throttle Valve
6 Spring
7 O Ring
8 Air Valve Cap
9 Exhaust Sleeve
10 Air Inlet
11 Throttle Lever
12 Bearing
13 Rear End Plate
14 Pin
15 Pin
16 Cylinder
17 Rotor
18 Rotor Blade
19 Front End Plate
20 Roll Pin
21 Bearing

Part # Description

22 Planet Gear
23 Planet Pin
24 Gear Cage
25 Internal Gear
26 Clamp Nut
27 Ratchet Housing
28 Needle Bearing
29 Drive Bushing
30 Ratchet Yoke
31 Washer
33 Forward/Reverse Knob
34 Reverse Spring
35 Reverse Pin
36 ¼” Ratchet Anvil
37 Ratchet Pawl
38 Pin
39 Spring
40 Ball
41 Thrust Washer
42 Retaining Ring
43 Grip

SKU 93821 For technical questions, please call 1-800-444-3353 PAGE 8

ASSEMBLY DIAGRAM

NOTE:

Some parts are listed and shown for illustration purposes only,

and are not available individually as replacement parts.

SKU 93821 For technical questions, please call 1-800-444-3353 PAGE 9

LIMITED 1 YEAR 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 one year 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, 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 com-

plaint 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]

SKU 93821 For technical questions, please call 1-800-444-3353 PAGE 10