Clarke 7621804, Operation & Maintenance Instructions Manual

Page: 5 / 12

5
OPERATION
This jack incorporates a twin piston pump with a ‘quick lift’ facility. This provides
the user with a rapid raising operation for the unloaded jack. When the jack
encounters a load (the vehicle to be raised), its distance raised per stroke
reduces to provide a gradual and controllable lifting operation.
Before use, inspect the jack for oil leaks or any other sign of damage. Should
any be apparent, have the jack repaired by a qualified technician.
1. Ensure the vehicle to be raised is stable and on firm level ground with the
wheels chocked.
2. Position the jack so that the saddle is directly beneath the lifting point.
• Consult the vehicle handbook to determine suitable lifting points.
3. Twist the handle clockwise to close the control valve.
4. Pump the handle to raise the saddle until it reaches the jacking point.
5. Take care that no obstruction prevents a clean lift. Keep all personnel at a
safe distance before lifting the vehicle.
NOTE: The jack may move slightly during operation. It is important
therefore, that the floor is clean and completely free from debris.
6. Position axle stands directly beneath suitable supporting points on the
vehicle and very gently twist the handle anticlockwise.
• This will open the control valve to lower the load onto the stands.
7. To stop it lowering at any point, turn the handle clockwise again. Always
avoid a rapid descent by turning the handle slowly.
8. Carefully lower the vehicle onto the axle stand, checking constantly,
preferably with an assistant, that the vehicles jacking point rests snugly and
cleanly on the axle stand, and that the stand is stable before the weight is
taken.
NOTE: Ensure this operation is carried out under complete control. DO
NOT allow the load to drop suddenly as this could damage
internal parts.
9. Completely remove the jack from the vehicle.
WARNING: NEVER WORK ON THE VEHICLE WHEN SUPPORTED ONLY BY A
JACK WHICH IS A HIGHLY DANGEROUS PRACTICE. THE VEHICLE MUST BE
SUPPORTED ON AXLE STANDS OR SUITABLE SUPPORTS, BENEATH THE
CORRECT JACKING/SUPPORT POINTS.