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24.
HANDLING IN HEAVY-DUTY CONDITIONS
24.1
PRECAUTIONS WHEN USING IN HEAVY-DUTY CONDITIONS
Always wait for the engine to cool down before removing the radiator cap. If you attempt to cool the
radiator too quickly and the radiator cap is removed too soon, hot steam may spurt out and may
cause serious injury.
24.2
CLEAN INSIDE OF COOLING SYSTEM
Scale and rust form easily inside the cooling system, so flush the system with genuine Komatsu radiator rust
prevention fluid, and take other steps to ensure that there is always clean water circulating in the system.
24.3
CLEAN RADIATOR FINS
Dirt may fly and get into your eyes, so always wear protective glasses or goggles.
•
If the radiator fins are clogged, it will cause over-heating, so blow
through the radiator fins with compressed air, steam or water.
•
When using air or steam, always point the nozzle at a right angle to
the radiator when cleaning.
Air pressure
Steam pressure
24.4
CHECK FAN BELT TENSION
If the fan belt is loose, adjust it to the specified tension. A loose fan belt can contribute to overheating.
24.5
ACTION WHEN ENGINE HAS OVERHEATED
DO NOT REMOVE THE RADIATOR CAP FROM A HOT RADIATOR! ALWAYS WAIT FOR THE ENGINE
TO COOL DOWN BEFORE REMOVING THE CAP. IF YOU TRY AND REMOVE THE CAP WHILE THE
COOLANT IS HOT, BOILING WATER AND HOT STEAM MAY SPURT OUT CAUSING INJURY.
If the coolant temperature gauge indicator enters the overheat (RED) range, immediately park the lift
truck in a safe place and take the following actions:
1. Keep engine running at low idle, open the engine hood (bonnet) for better airing of the
engine compartment and wait for the engine to cool down. Once cooled down, shut off the
engine. If the engine fan is not turning, shut off the engine immediately and let it cool down
naturally.
2. After the engine has cooled (and is OFF), check the coolant level. Also check for water
leakage from radiator and/or hoses.
If coolant level is low, refill the radiator (first), and sub-tank (second), with cooling water. If water
leakage is discovered, place the lift truck OUT OF SERVICE and contact your Komatsu Forklift dealer
for repairs.
142 PSI (0.98 MPa) (10 kg/cm
57 PSI (0.39 MPa) (4 kg/cm
24. HANDLING IN HEAVY-DUTY CONDITIONS
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