Clarke X-Pro CAT163, Operating & Maintenance Instructions

9

Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com

OPERATING THE IMPACT WRENCH

1. Locate the socket over the nut to 

be tightened or loosened.

2. Squeeze the trigger to start and 

release the trigger switch to stop 
the wrench.

• The square drive will continue to 

rotate very briefly after the 
trigger has been released.

ADJUSTING THE SPEED

1. To adjust the speed, set the lever 

to one of the 3 settings available. 
(Setting 1-Low, 3- High).

• These numbers are only for 

reference and do not denote a 
specific amount of power.

2. For maximum power when 

removing stubborn nuts, set the 
wrench to its highest setting.

3. Where the torque setting is critical, 

the final tightening of nuts or bolts must be done by hand using a 
calibrated torque wrench.

LOOSENING A WHEEL NUT

1. Remove any wheel trim, before selecting the appropriate socket and 

placing firmly on the square drive of the wrench.

2. With the FORWARD/NEUTRAL/REVERSE switch in the REVERSE running 

position, and holding the wrench firmly in BOTH HANDS, pull the trigger. The 
nut will be impacted repeatedly until it is loosened. 

IMPORTANT!

 Release 

the trigger as soon as the nut begins to loosen.

3. Jack up the vehicle according to the vehicles handbook so that the wheel 

is clear of the ground, then proceed to fully undo the wheel nuts.

4. Soak rusted nuts in penetrating oil, and break rust seal before twisting off 

with the wrench.

WARNING: ENSURE THAT THE CORRECT SOCKET IS BEING USED FOR THE 
NUTS ON YOUR PARTICULAR VEHICLE. AN INCORRECT SOCKET SIZE IS 
LIKELY TO DAMAGE THE HEADS OF THE BOLTS/NUTS.