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31. MAINTENANCE
n CLEAN INSIDE OF COOLING SYSTEM
•
If air bleeding is improperly carried out after the coolant has been replaced, or after the
radiator or carburetor has been replaced, it may contribute to overheating. Be sure to bleed all
of the air from the engine cooling system.
•
After operating the engine, the radiator coolant mixture will be extremely hot. Boiling water
and steam can cause severe burns if it touches the skin or clothing. Always wait for the engine
to cool down before opening the radiator cap or draining the water from the radiator.
•
Do not remove the radiator cap when the engine and coolant is hot. Boiling water and steam
may spurt out. Always wait for the temperature to go down, then turn the radiator cap slowly
to release pressure gradually before removing the cap completely.
•
The cleaning operation is carried out with the engine running. The lift truck may move
suddenly and unexpectedly, so never go under the lift truck during this operation. Never go
under the lift truck when the engine is running.
CLEAN RADIATOR
1. Stop the lift truck on level ground.
2. After the engine has cooled off, open the drain valves at the
bottom of the radiator and the engine cylinder block to drain
the water/coolant mixture.
3. After draining, close the drain valves. Fill the radiator with
fresh water (tap water) and radiator flushing fluid through the
water filler, then run the engine at idling for 15 minutes.
4. Stop the engine, open the drain valves to drain the water,
then add fresh water and run the engine at idling until clean,
clear water comes out of the drain valves (5 - 10 minutes).
5. Stop the engine, drain all the water from the drain valves, then close the drain valves and fill the radiator
with fresh water and glycol-based coolant.
Water and Coolant Capacities
K21 engine
K25 engine
4D94E engine
CHECK FOR DAMAGE
Check visually to ensure there are no dents or damage to the fins.
NOTICE
•
Coolant is flammable. Keep it away from open flame and sparks.
•
In cold areas, add glycol-based coolant. See "COLD WEATHER OPERATION" on page 3-43.
•
When not using glycol-based coolant, add rust prevention fluid to the radiator.
•
Always use genuine Komatsu Forklifts products for the flushing fluid, rust prevention fluid and gly-
col-based coolant.
n CHECK FOR CATCHING, STALLING AND KNOCKING WHEN ACCELERATING
n CHECK AIR CLEANER AND REPLACE ELEMENT/FILTER IF DIRTY
See "CHECK AIR CLEANER AND REPLACE FILTER IF DIRTY" on page 4-17.
n CHECK OPERATION OF GOVERNOR (MAXIMUM SPEED)
n CHECK PIPING/TUBING AND CONNECTIONS/FITTINGS FOR FUEL/GAS LEAKAGE
4-22
2.40 U.S. gal. (9.1 L) (2.00 UK gal.)
2.43 U.S. gal. (9.2 L) (2.02 UK gal.)
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