Komatsu D375A-8, Operation & Maintenance Manual

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METHOD FOR CHANGING COOLANT, CHECKING AND REPLACING RADIATOR
CAP AND PRESSURE CAP
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WARNING
• 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 in this state. Always wait for the temper-
ature to go down, turn the cap slowly to release the pressure, then remove the cap with care.
• When starting the engine while cleaning the machine, set the parking brake lever and the work
equipment lock lever in LOCK position to prevent the machine from moving.
• For the detail of starting the engine, see OPERATION section.
• 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.
NOTICE
If the seal portion of radiator cap and pressure cap is dirty or deteriorated or damaged, the coolant may
not return from the reservoir tank to the radiator, and may cause the machine failure.
Place the machine on a level ground when cleaning the inside of cooling system or changing the coolant.
1.
Check that the seal (a) of the radiator cap (1) is not de-
formed nor cracked, and the foreign material such as the
sand is not stuck.
If there is an abnormality, clean or replace the seal.
2.
Check that the seals (b) and (c) of the pressure cap (2) are
not deformed nor cracked, and the foreign material such
as the sand is not stuck.
If there is an abnormality, clean or replace the seal.
If the foreign material is stuck, the coolant may be mixed with a plenty of foreign materials. Clean it according to
“METHOD FOR CLEANING INSIDE OF COOLING SYSTEM”.
MAINTENANCE PROCEDURE MAINTENANCE
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