Komatsu AX20 Operation & Maintenance Manual page 96

22. TRAVEL OPERATIONS
Check elongation of the lift-chain
Measure the length over 17 links and check that the length is within
the following specified value.
AX models (all)
BX 2.0 and 2.5 ton lift trucks
BX 3.0 ton lift trucks
Replace the chain if the measurement value exceeds this range
The elongation of the lift-chain can be checked with the following
"chain wear scale" also.
Regular inspection and lubrication of the chains will increase their
service life and reduce downtime.
If the chains stretch beyond the recommended amount, they should
be replaced in pairs. Chain stretch can be measured with chain
wear scale part no. 661923.
Measure the chains according to the instructions printed on the
chain wear scale, without a load on the carriage.
To check the hoist chains, raise the carriage 12.0 in. (30 cm) off the
ground to put tension on the chains.
Check the lift-chain lubricant
• The lift-chain is liable to break if heavily rusted.
• If lubrication is insufficient, apply engine oil to prevent rusting.
• Visually check the lift-chain for damage or cracks. If any abnormality is found, consult your
Komatsu Forklift dealer.
NOTICE
Use genuine Komatsu engine oil. (See "LUBRICANT LIST" on page 4-2.)
22.1.3 CHECKS WHILE ADVANCING SLOWLY
n CHECK STEERING WHEEL OPERATION
Check the following items while advancing slowly.
• No deviation of steering wheel.
• No unstable steering in straight travel.
• No feeling of abnormally heavy steering when the steering wheel is turned.
n CHECK BRAKE OPERATION
Check the following items by depressing the brake pedal to apply the brake while advancing slowly.
• The brake is properly applied.
• The brake is applied uniformly.
n CHECK OPERATION OF CLUTCH PEDAL (CLUTCH-TYPE LIFT TRUCK)
• When the pedal is depressed, the clutch must be completely disengaged with a margin to spare.
• When the pedal is released, there must be no slipping of the clutch.
3-28
Length over 17 links
Max. 10.8 in. (275.5 mm)
Max. 13.1 in. (332 mm)
Max. 21.7 in. (550 mm)