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Parts & Service: 020 8988 7400 / E-mail: [email protected] or [email protected]

TROUBLESHOOTING

ACCESSORIES

A wide range of accessories is available including filter/regulators, lubricators, 
high-pressure hoses (5 to 50 metres) etc.

Contact your CLARKE dealer for further information or CLARKE International 
Service Department on 01992 565333.

SYMPTOM

PROBLEM

SOLUTION

Tool runs at normal 
speed but slows down 
under any load.

1. Excessive pressure on
    tool.
2. Motor parts worn.

3. Worn or sticking
    mechanism due to
    lack of lubricant.

1. Reduce the force
    applied to the tool.
2. Return to Clarke dealer
    for repair.
3. Drip air tool lubricating
    oil into air inlet. Allow oil
    to soak moving parts
    before using.

Tool runs slowly. Air flows 
weakly from exhaust.

1. Motor parts jammed
    with gum/dirt.
2. Regulator in closed
    position.
3. General airflow
    blocked by dirt.

1. Examine inlet air filter for
    cleanliness.
2. Adjust regulator to open
    position.
3. Operate tool in short
    bursts.

Tool will not run. Air flows 
freely from exhaust.

1. Motor vanes stuck
    due to buildup of
    foreign material.

1. Disconnect air supply
    and rotate tool assembly
    manually.
2. Try operating tool in
    short bursts.
3. Tap motor housing gently
    with a rubber mallet.
4. Drip a few drops of air
    tool lubricating oil into air
    inlet to soak moving
    parts.

Tool will not shut off.

1. Throttle O-rings 
    damaged or ill-fitting
    in seat.

1. Return to Clarke dealer
    for repair.

Summary of Contents for CAT78

Page 1: ...OPERATING MAINTENANCE INSTRUCTIONS GC0813 IMPACT WRENCH MODEL NO CAT78 PART NO 3110790...

Page 2: ...and operating instructions carefully before using this product Please pay particular attention to all sections of these instructions that display warning symbols and notices GUARANTEE This product is...

Page 3: ...tired or under the influence of alcohol drugs or medication 2 Always wear eye protectors when using the impact wrench eye protectors must provide protection from flying particles from the front and t...

Page 4: ...k change couplings should not be located at the tool They add weight and could fail due to vibration 17 DO NOT force or misuse the tool It will do a better and safer job at the rate for which it was d...

Page 5: ...0 8988 7400 E mail Parts clarkeinternational com or Service clarkeinternational com OVERVIEW NO DESCRIPTION NO DESCRIPTION 1 Anvil 4 Speed Control Regulator 2 Forward Reverse Valve 5 1 4 BSP Female Ai...

Page 6: ...unusually long air hose is required over 8 metres the line pressure or the hose inside diameter may need to be increased The minimum hose diameter should be 5 16 8mm ID and fittings should have the sa...

Page 7: ...h Remove the oil fill screw from the side of the mini oiler and fill with Air line Oil available from your CLARKE dealer Replace the screw before using the wrench 2 If a mini oiler is not being used r...

Page 8: ...ted in the forward direction 2 For loosening the wrench should be operated in the reverse direction FITTING THE IMPACT SOCKET 1 Select the impact socket you require which must be in good condition and...

Page 9: ...ly turn the regulator until the nut or bolt moves very slightly in the direction in which it was set The wrench is now set to replicate that tightness Note the setting for future use When critical tor...

Page 10: ...NING Keep the body of the impact wrench clean and free from debris Grit or gum deposits in the tool may reduce efficiency SERVICE AND REPAIR If the tool runs erratically or becomes inefficient althoug...

Page 11: ...ol for 5 seconds in order to lubricate the internal parts When not in use disconnect from air supply clean tool and store in a safe dry place SPECIFICATIONS Please note that the details and specificat...

Page 12: ...ealer for repair 3 Drip air tool lubricating oil into air inlet Allow oil to soak moving parts before using Tool runs slowly Air flows weakly from exhaust 1 Motor parts jammed with gum dirt 2 Regulato...

Page 13: ...13 Parts Service 020 8988 7400 E mail Parts clarkeinternational com or Service clarkeinternational com PARTS LIST DIAGRAM...

Page 14: ...Screw 7 Set Screw 33 Screw 8 Housing Bush 34 Exhaust Cover 9 N A 35 Throttle Lever 10 Socket Retaining Ring 36 Pin 11 O Ring 37 Push Pin 12 Anvil 38 O Ring 13 Reverse Valve 39 Gasket 14 Hammer Cage P...

Page 15: ...15 Parts Service 020 8988 7400 E mail Parts clarkeinternational com or Service clarkeinternational com DECLARATION OF CONFORMITY...

Page 16: ......

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