Method For Cleaning Inside Of Cooling System - Komatsu PC290LC-11 Operation & Maintenance Manual
Hydraulic excavator
Hide thumbs
Also See for PC290LC-11:
- Operation & maintenance manual (41 pages) ,
- Shop manual (61 pages)
Table of Contents
Advertisement
MAINTENANCE PROCEDURE
5)
Always install cover (3) so that vacuator (4) faces right
below (A).
6)
When cover (3) is installed, check that the clearance
between the air cleaner body and cover (3) is not too
large.
If the clearance is too large, remove cover (3), and
then install it again.
9.
Replace 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. If the cap is removed under this condition and the coolant is drained, it may cause
burns. Accordingly, wait until the coolant temperature drops, then 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 in 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, change the coolant according to the table.
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 anticorrosion, antifreeze and cooling properties and can be used continuously for 2 years or
4000 hours.
Komatsu recommends the use of 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.
4-20
k
k
WARNING
Cleaning of inside of cooling system and re-
placement of coolant
Every 2 year or
4000 hours, whichever comes sooner
MAINTENANCE
Advertisement
Chapters
Table of Contents
