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MAINTENANCE
4)
Always install the cover (3) so that the vacuator valve
(4) faces the bottom (A).
5)
When the cover (3) is installed, check that the clear-
ance between the air cleaner body and cover (3) is not
too large.
If the clearance is too large, remove the cover (3), and
then install it again.
9.
Replace the seal (9) on the cover (3) with a new one.
CHECK AND REPLACE VACUATOR VALVE
Check vacuator valve (4) for damage and deformation of its rubber portion.
If the vacuator is damaged or its rubber part is deformed, replace it with a new one.
METHOD FOR CLEANING INSIDE OF COOLING SYSTEM
•
Immediately after the engine is stopped, the coolant is still hot and the pressure is accumulated in
the radiator. You may get burn injury if you remove the cap to perform draining in this state. Always
wait for the temperature to go down, and turn the cap slowly to release the pressure.
•
When starting the engine while cleaning the machine, set the lock lever in LOCK position to prevent
the machine from moving.
•
When the undercover is removed, there is a danger of touching the fan.
Never enter the rear part of the machine when the engine is running.
Place the machine on a level ground when cleaning or changing the coolant.
Clean the inside of the cooling system, or change the coolant according to the table below.
Coolant
Non-Amine Engine Coolant
(AF-NAC)
The coolant has the important function of preventing corrosion as well as preventing freezing.
Even in the areas where freezing is not an issue, the use of coolant is essential.
Komatsu machines are supplied with Non-Amine Engine Coolant (AF-NAC).Non-Amine Engine Coolant (AF-
NAC) has excellent anti-corrosion, antifreeze and cooling properties and can be used continuously for 2 years
or 4000 hours.
As a rule, Komatsu does not recommend the use of the coolant other than Non-Amine Engine Coolant (AF-
NAC). If you use another coolant, it may cause serious problems, such as corrosion of the engine and aluminum
parts of the cooling system.
k
k
WARNING
Cleaning of inside of cooling system and re-
placement of coolant
Every 2 years or
4000 hours, whichever comes sooner
MAINTENANCE PROCEDURE
4-21
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