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Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com
OPERATION - IMPACT WRENCH
1. Select an appropriate impact socket, which must be in good condition,
and fits the anvil and nut closely. Use only square drive impact wrench
sockets as listed on page 14. (NEVER use standard hand sockets).
2. Select Forward or Reverse drive by moving the rod, in the body of the
wrench, to the ‘F’ or ‘R’ position. Always check the direction of rotation
before operation. Select the appropriate lever when the spindle is moving.
3. Squeeze the trigger to start the wrench. Release the trigger to stop.
4. Turn the airline regulator to its lowest setting, then apply the wrench to a
nut or bolt of known tightness (or torque setting), size, thread pitch, and
thread condition as those on the job.
5. Start the wrench, in the FORWARD position, and gradually turn the air
regulator until the nut or bolt moves very slightly in the direction in which it
was set. The tool is now set to duplicate that tightness. For future use, note
that specific setting.
6. When critical torque values are not required, turn nut or bolt until it fits
snugly, and then turn a further one quarter to one half a turn - slightly more
if gaskets are used between surfaces.
7. For additional power during disassembly work, turn the air line regulator to
its highest setting.
8. This tool is rated at 5/8" bolt size, and is downgraded for spring ‘U’ bolts, tie
bolts, long cap screws, double depth nuts, badly rusted conditions, and
spring loaded fasteners as these conditions absorb much of the impact
power.
9. Turn off the wrench as soon as the impact sound is heard.
IMPORTANT: Where the torque setting is critical, the final tightening of nuts or
bolts, must be by hand using a properly 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.
CAUTION: ALWAYS BE SURE THAT THE TOOL IS SWITCHED OFF BEFORE
ATTACHING OR REMOVING A SOCKET. ALWAYS TAKE CARE TO USE THE
CORRECT SIZE SOCKET FOR BOLTS AND NUTS. AN INCORRECT SOCKET
WILL CAUSE DAMAGE TO THE BOLT OR NUT.
