Komatsu Galeo PC800LC-8, Operation & Maintenance Manual

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TROUBLES AND ACTIONS
OPERATION
3-152
Engine 3
q
( ): Always contact your Komatsu distributor when dealing with these items.
q
In cases of problems or causes which are not listed below, contact your Komatsu distributor for repairs.
Problem Main causes Remedy
Engine oil pressure monitor lights up
•Engine oil pan oil level is low (suck-
ing in air)
•Clogged oil filter cartridge
•Defective tightening of oil pipe joint,
oil leakage from damaged part
•Disconnection, broken wiring to
sensor
•Defective sensor
•Defective Monitor
•Add oil to specified level, see
CHECK BEFORE STARTING
•Replace cartridge, see EVERY
500 HOURS SERVICE
(•Check, repair)
(•Repair, connect wiring)
(•Replace)
(•Replace)
Steam is emitted from top part of
radiator (pressure valve)
•Coolant level low
•Loosen fan belt
•Defective water level sensor
•Dirt or scale accumulated in cooling
system
•Clogged radiator fin or damaged fin
•Defective engine water temperature
gauge
•Defective thermostat
•Defective thermostat seal
•Loose radiator filler cap (high alti-
tude operation)
•Disconnection, broken wiring to
sensor
•Add coolant, repair, see
leakage CHECK BEFORE
STARTING
•Check fan belt tension, see
EVERY 500 HOURS SERVICE
(• Replace water level sensor)
•Change coolant, clean
inside of cooling system, see
WHEN REQUIRED
•Clean or repair, see EVERY 500
HOURS SERVICE
(•Replace engine water
temperature gauge°
(•Replace thermostat°
(•Replace thermostat seal°
•Tighten cap or replace packing
(•Repair, connect wiring)
Radiator coolant level monitor lights
up
Engine water temperature gauge is
in red range
Engine water temperature monitor
lights up
Engine water temperature gauge
display stays at lowest level and
does not rise
•Defective water temperature gauge
monitor
•Defective thermostat
•In cold weather, cold wind is blow-
ing strongly against engine (•Replace water temperature
gauge monitor)
•Replace thermostat
(•Install radiator curtain)
Engine does not start even when
starting motor is turned
•Lack of fuel
•Air in fuel system
•No fuel in fuel filter
•Starting motor cranks engine too
slowly
•Starting motor does not turn
•Defective valve clearance
(defective compression)
•Add fuel, see CHECK BEFORE
STARTING
(•Repair place where air is sucked
in)
•Fill filter with fuel. See EVERY 500
HOURS SERVICE.
•See ELECTRICAL SYSTEM
•See ELECTRICAL SYSTEM
(•Adjust valve clearance)
Fuel stops from time to time •Fuel tank cap •(Clean or replace fuel tank cap)