Central Pneumatic 91107 Manuel utilisateur

3/8” STUBBY AIR RATCHET WRENCH

3491 Mission Oaks Blvd., Camarillo, CA 93011

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

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

Model 91107

of this manual or any artwork contained herein may be reproduced in any shape

or form without the express written consent of Harbor FreightTools.

OPERATING INSTRUCTIONS

Page 2

SKU 91107

Specifications

Save This Manual

You will need the manual for the safety warnings and precautions, operating and mainte-

nance procedures, parts list and diagram. Keep your invoice with this manual. Write the

invoice number on the inside of the front cover. Keep 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 expose to rain. Keep work area well lit. Do not use electrically

powered tools in the presence of flammable gases or liquids.

3. Keep children away. Children must never be allowed 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 keep out of reach of children.

5. Use the right tool for the job. Do not attempt to force 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 jewelry as they can be caught in

moving parts. Protective, electrically nonconductive clothes and nonskid footwear are

recommended when working. Wear restrictive hair covering to contain long hair.

7. Use eye and ear protection. Always wear ANSI approved impact safety goggles.

Wear a full face shield if you are producing metal filings or wood chips.Wear an ANSI

approved dust mask or respirator when working around metal, wood, and chemical

dusts and mists.

Maximum Torque 40 Ft. Lbs.

Average Air Consumption 2.8 CFM

Drive Size 3/8” Square

Air Inlet 1/4” - NPT Female

Maximum Air Pressure 90 PSI

Maximum Rotation Speed 280 RPM @ 90 PSI

Ratchets Per Minute 160

Page 3

SKU 91107

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 other extension to increase torque on this tool. Do not

exceed the maximum torque rating on this tool.

Page 4

SKU 91107

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 perfor-

mance.

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.

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

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. Youwill need to preparea1/4”NPT air connector (soldseparately)toconnect to the airinlet

on the Ratchet. First, wrap the 1/4” air connector (not included) with pipe thread seal tape

before threading it into the Air Inlet (1). 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 con-

tinual 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.

Ratchet

1/4” - NPT

Page 5

SKU 91107

Operation (continued)

Maintenance

Throttle Lever (48)

Air Inlet (1)

Reverse Switch (35) Air Regulator (6) (see inset below)

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. Periodically apply a high grade, light machine oil to the Trigger Pivot area (see above).

3. Make sure the Ratchet Anvil (38), the Air Inlet (1), and the Reverse Switch (35) are clear of

grease, dirt, or debris.

4. Store the Ratchet in a clean, dry location, out of reach of children.

Trigger Pivot Area

Ratchet Anvil (38)

Warning! Disconnect the Ratchetfrom the airsource

whenattachingand removing sockets(not included). There

isnosafety lockmechanismon this tool;alwaysdisconnect

from the air source when not in use.

Refer to the photograph above.

1. Attach a 3/8” drive socket (not included) to the Ratchet

Anvil (38).

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

3. While holding the Ratchet securely with both hands, gently press the Throttle Lever

(48) to activate the Ratchet. Do not force the unit;allow it to do the work for you. Do not

overtighten hardware with this item. To change direction (loosen vs. tighten), stop the

tool and move it away from the workpiece, then turn the Reverse Switch (35).

4. Toadjustthetorque,readjustthe air pressurebychangingthesettingonthecompressor,

or, you can fine tune the air pressure by gently turning the Air Regulator (6) with a

standard screwdriver. Turn the knob toward “L” (Counterclockwise) for low and “H”

(Clockwise) for high. Turn the knob gently or you will break the plastic Air Regulator (6)

knob. Do not exceed the maximum air pressure of 90 PSI. See the Air Regulator Inset

above.

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 theThrottle Lever (48) and activate

the Ratchet to expel any air still inside the tool.

6. Remove the socket (not included).

Air Regulator Inset

Page 6

SKU 91107

NOTE: Some parts are listed and shown for illustration purposes only and are not available

individually as replacement parts.

PLEASE READTHE FOLLOWING CAREFULLY

THEMANUFACTURER AND/ORDISTRIBUTOR HAS PROVIDEDTHE PARTSDIAGRAMINTHIS

MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBU-

TORMAKESANY REPRESENTATION ORWARRANTYOFANYKINDTOTHE 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/ORDISTRIBUTOREXPRESSLYSTATESTHATALLREPAIRSANDPARTSREPLACEMENTS

SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSEDTECHNICIANS AND NOT BYTHE

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.

Parts List

Part No. Description Part No. Description

1 Air Inlet 27 Needle Bearing

2 Air Inlet O-ring 28 Planet Cage Bushing

3 Muffler Deflector 29 Internal Gear Spacer

4 Muffler Deflector O-ring 30 Ratchet Housing

5 Motor Housing 31 Crankshaft

6 Air Regulator 32 Drive Bushing

7 Dowel Pin 33 RatchetYoke

8 Air Regulator O-ring 34 Dust Cover

9 Throttle Valve Spring 35 Reverse Switch

10 Throttle Valve Stem 36 Anvil Upper Washer

11 Throttle Valve O-ring 37 Spring Pin

12 Throttle Valve O-ring 38 Ratchet Anvil

13 Regulating Valve 39 Spring

14 Regulating Valve O-rings 40 Bearing

15 Bearing 41 Ratchet Spring

16 Rear Plate 42 Lock Pin

17 Cylinder 43 Ratchet Pawl

18 Rotor 44 Ratchet Pawl Pin

19 Rotor Blade 45 Thrust Washer

20 Front Plate 46 Motor Clamp Washer

21 Bearing 47 Retaining Ring

22 Internal Gear 48 Throttle Lever

23 Idler Gear Plate 49 Throttle Lever Pin

24 Idler Gear Pin 50 Housing Cover

25 Idler Gear 51 Muffler Deflector Ring

26 Clamp Nut

Page 7

SKU 91107

Assembly Drawing

21 11

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