Komatsu D375A-8, Operation & Maintenance Manual

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Problem Main causes Remedy
Ripper speed is low.
Lack of hydraulic oil
Add oil to the specified level. See
CHECKS BEFORE STARTING.
Defective solenoid valve Replace. (*)
Clogged filter Replace. (*)
Work equipment lock lever is in
LOCK position.
Set to FREE.
Ripper force is insufficient. Oil leakage of piping Retighten to repair. (*)
PHENOMENA AND ACTIONS FOR ENGINE RELATED PARTS
• Contact your Komatsu distributor for the remedies indicated with (*) in the remedy column.
• In cases of problems or causes which are not listed below, ask your Komatsu distributor for repairs.
Problem Main causes Remedy
After warming up, when engine
speed is increased, engine oil pres-
sure caution lamp flashes. Insufficient oil in engine oil pan (suck-
ing in air) Add oil to the specified level. See
CHECKS BEFORE STARTING.
Oil filter cartridge is clogged. Replace. See EVERY 500 HOURS
MAINTENANCE.
Oil leakage due to defective tighten-
ing or breakage of oil pipe or pipe
joint Check and repair. (*)
Defective monitor Replace. (*)
Steam spurts out from top of radiator.
(pressure valve) Engine coolant is insufficient, coolant
leaks. Check, add coolant, repair by refer-
ring to CHECKS BEFORE START-
ING.
Fan speed is low. Check and repair fan motor hydraulic
circuit.
Accumulation of dirt or scale in cool-
ing system Change coolant, flush inside of cool-
ing system by referring to WHEN RE-
QUIRED.
Clogged radiator fins or damaged fin Clean or repair by referring to WHEN
REQUIRED.
Thermostat has a trouble. Replace thermostat. (*)
Loose radiator filler cap (in high alti-
tude operation) Tighten the cap or replace packing.
Defective monitor Replace monitor. (*)
OPERATION TROUBLES AND ACTIONS
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