®
3/8” AIR RATCHET
WRENCH
Model 47706
ASSEMBLY and OPERATING
INSTRUCTIONS
®
3491 Mission Oaks Blvd., Camarillo, CA 93011
Copyright c 2002 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 and replacement parts, please call 1-800-444-3353
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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 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 Throttle Lever (#4) is not depressed
when not in use and before attaching to the air hose. Do not carry the Rachet Wrench
with the Throttle Lever (#4) depressed.
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 Throttle Lever (#4) does not engage and disengage
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 on prescriptions to determine if your judgment 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 for the air
compressor, it must be of the proper size and type to supply the correct current to the
tool without heating up. Otherwise, the extension cord could melt and catch fire, or
cause electrical damage to the tool. Check your 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 gases as a power source.
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.
Page 3
SKU 47706
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Warning:The warnings, cautions, and instructions discussed in this instruction 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 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
Rachet
Wrench
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 the included 1/4” air connector to connect to the Air
Inlet (#2). First, wrap the 1/4” air connector with pipe thread seal tape before connecting to a
Air Source Hose (not included).
2. Attach air hose to the Air Inlet (#2) on the Rachet Wrench.
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.
3. Set the air pressure on your compressor to 90 PSI. Do not exceed the recommended air
pressure of 90 PSI.
4. Check the air connection for leaks.
Page 4
REV 06/06
SKU 47706
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Operation (continued)
Note: Turn off your air compressor and disconnect the air hose when you are changing
sockets. After you attach the socket, attach the air hose and turn the air compressor on.
5. Select the appropriate size 3/8” socket for your needs.
6. Attach the socket (not included) to the Anvil (#18).
7. Moving the Forward/Reverse Button (#38) in a counterclockwise direction toward the “F”
will tighten, and moving the Forward/Reverse Button (#38) clockwise toward the “R” will
loosen.
Tightening
Note: Forward/Reverse Button (#38) set toward the “F”.
8. Tighten the nut as tight as you can by hand.
9. Place the socket (not included) over the nut you wish to tighten.
10. Grip the Rachet Wrench firmly and gently squeeze the Throttle Lever (#4).
Note: If the Rachet Wrench cannot tighten it to your satisfaction, do not raise the air pressure
on the compressor over 90 PSI. Pressures above 90 PSI will strip the workpiece and damage
the tool. Use appropriate methods and tools to tighten the nut.
11. When the nut is tightened, release the Throttle Lever (#4). Turn off the air compressor
and disconnect the hose.
12. If available, check the recommended torque specification for the nut. Use a torque
wrench to tighten the nut to the proper setting after using the Rachet Wrench.
Loosening
Note: Forward/Reverse Button (#38) set toward the “R”.
13. Place the socket (not included) over the nut you wish to loosen.
14. Grip the Rachet Wrench firmly and gently squeeze the Throttle Lever (#4).
Note: If the Rachet Wrench cannot loosen the nut, do not raise the air pressure on the
compressor over 90 PSI. Do not attempt to loosen the nut with the Rachet Wrench. Use
appropriate methods and tools to loosen the nut.
15. When the nut is loosened, release the Throttle Lever (#4). Turn off the air compressor
and disconnect the hose.
16. If needed, remove the nut from the socket.
Maintenance
1. Make sure your Rachet Wrench is disconnected from the air hose before attempting any
maintenance.
2. If you are not using an automatic oiler system, put a few drops of pneumatic tool oil through
the air line before and after each use. During use, add a few drops every hour.
3. Apply a few drops of oil to the Throttle Lever (#4), Pin (#5), and the Actuation Pin (See
Assembly Drawing on page 7) before each use.
4. Wipe the Rachet Wrench down with a lint free cloth after each use.
5. Make sure the Anvil (#18) is clear of dirt or debris. If possible, spray it with compressed air
before each use.
Page 5
SKU 47706
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Parts List
Part No.
1
2
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Description
Housing
Air Inlet
Throttle Lever
Pin
Valve Stem
0-ring
Spring
Valve Plug
Washer
0-ring
Thread Ring Gear 1
Cap
Qty. Part No.
Description
Drive Bushing
Rachet Yoke
Cylinder
Rotor
Rotor Blade
Front Plate
Bearing
End Plate
Bearing
Pin
Washer
Spring
Lock Pin
Rachet Pawl
Pin
Forward/Reverse Button 1
Retainer Ring
Spring
Qty.
1
1
1
1
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
22
23
24
25
26
27
28
29
30
31
32
34
35
36
37
38
39
40
41
42
1
3
3
1
1
1
1
1
1
Gear
Pin
Gear Plate
Crankshaft
Anvil
Rachet Housing
Bushing
Needle Bearing
1
2
2
1
Steel Ball
Washer
1
43
1/4” Coupler
1
PLEASE READTHE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDEDTHE PARTS DIAGRAM INTHIS
MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBU-
TOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KINDTOTHE BUYERTHAT 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 PARTS THERETO.
NOTE: Some parts are listed and shown for illustration purposes only and are not available
individually as replacement parts.
Page 6
REV 06/06
SKU 47706
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Assembly Drawing
Page 7
REV 06/06
SKU 47706
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