Kenworth T410, Driver'S Handbook Manual

Page: 275 / 418

CAT: 8612 November 2019 Page 249
PREVENTIVE MAINTENANCE
JACK OPERATING INSTRUCTIONS
Before use, visually inspect the jack for any abnormal conditions and refer
to the preceding WARNINGS, SAFE USAGE STATEMENTS and NOTES
below.
There may be circumstances where dirt or residue on the ball seat
may cause the jack to lower quickly and the jack handle to fly up in
force. This may result in damage to the jack handle or personal injury.
Where ever possible the jack should be positioned to ensure that the
jack handle does not come into contact with any part of the vehicle
whilst it is being used. Check that there is a sufficient gap between
the jack handle at its highest point and the vehicle before pumping
the handle up and down to raise the load.
FOR SAFE USE, IT IS RECOMMENDED THAT:
1. Ensure the vehicle’s parking brakes are applied.
2. Chock all road wheels that are to remain on the ground.
3. Remove the key from the ignition, or turn OFF the electrical master
switch.
4. No person should remain in a vehicle that is to be jacked.
5. Position the jack beneath the axle to be lifted. A 20 tonne jack will
be required when changing a road wheel. Do not use road springs
as a jacking point. Position the jack under the axle of, and as close
as practicable to, the wheel to be changed.
6. The jack must be seated on a level, flat hard surface, such as
concrete, bitumen or compacted road metal.
7. NEVER use a jack as a sole means of support. Position suitable
stands or supports under chassis frame.
8. Vehicles either jacked up or hanging up on chain hoists should be
blocked with axle stands or substantial timber blocking.
Ordinary pedestal jacks are designed ONLY to LIFT a vehicle. Once lifted,
the vehicle should be supported by other appropriate means, such as stands.
NEVER get under, or work under, a vehicle supported ONLY by a jack.
Only work under a vehicle supported by stands and with wheels chocked.
To raise the load
1. With the jack in the lowered position, turn the release valve with the
end of the jack handle in a clockwise direction until it is firmly closed.