Clean And Check Radiator Fins, Oil Cooler Fins, Aftercooler Fins - Komatsu D475A-5E0 Operation & Maintenance Manual

MAINTENANCE

CLEAN AND CHECK RADIATOR FINS, OIL COOLER FINS, AFTERCOOLER FINS

Perform this procedure if there is any mud or dirt stuck to the radiator or oil cooler.
REMARK
Check the hydraulic cooler hoses. If any hose is cracked or hardened by age, replace with a new hose. Also check
and tighten all loose hose clamps.
CLEANING BY ROTATING COOLING FAN IN REVERSE DIRECTION
When cleaning the cooling fan by turning it in the reverse direction, make sure that the parking brake lever is in LOCK position.
NOTICE
When rotating the cooling fan in the reverse direction, be extremely careful of flying dust.
Open up the right and left engine side covers and check that no dust and dirt are accumulated inside the engine room.
When the fan operation confirmation lamp is lighted and the fan is turning in the reverse direction, the machine does not move
even if the joystick (steering, directional, and gear shift lever) is operated to any of the forward, reverse and steering positions.
This function is designed to protect the radiator.
When stopping the engine when the cooling fan is rotating in the reverse direction, first run the engine at low idle, then stop it.
The dust and dirt stuck to the radiator and cooler can be blown out by rotating the cooling fan in the reverse direction.
1. Turn starting switch (1) to OFF position and stop the engine.
2. Turn starting switch (1) to ON position.
3. Turn fan rotation selector switch (2) to the cleaning (CLN)
position.
Fan reversal lamp (3) lights up.
WARNING
SERVICE PROCEDURE
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