Komatsu HB215LC-3, Operation & Maintenance Manual

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Problem Main causes Remedy
Engine oil pressure caution lamp
lights up. Insufficient oil in engine oil pan (suck-
ing in air) Make the oil level to the specified lev-
el. See CHECKS BEFORE START-
ING.
Improper oil is used. (Viscosity is im-
proper.) Replace oil by referring to METHOD
FOR USING FUEL, COOLANT AND
LUBRICANTS ACCORDING TO AM-
BIENT TEMPERATURE and REC-
OMMENDED FUEL, COOLANT, AND
LUBRICANT.
Oil filter cartridge is clogged. Replace the cartridge by referring to
EVERY 500 HOURS MAINTE-
NANCE.
Oil is leaked due to improper connec-
tion or breakage of oil pipe or pipe
joint. Check, repair. (*)
Defective engine oil pressure sensor Replace sensor. (*)
Defective monitor Replace monitor. (*)
Steam spurts out from top of radiator
(pressure valve). Insufficient coolant, water leakage Check, add coolant, repair by refer-
ring to CHECKS BEFORE START-
ING.
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 EVERY
500 HOURS MAINTENANCE.
Defective thermostat Replace thermostat. (*)
Loose radiator filler cap (in high alti-
tude operation) Tighten cap or replace packing.
Defective coolant level sensor Replace sensor. (*)
Defective monitor Replace monitor. (*)
Radiator coolant level caution lamp
lights up. Insufficient coolant, water leakage Check, add coolant, repair by refer-
ring to CHECKS BEFORE START-
ING.
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 EVERY
500 HOURS MAINTENANCE.
Defective thermostat Replace thermostat. (*)
Loose radiator filler cap (in high alti-
tude operation) Tighten cap or replace packing.
Defective coolant level sensor Replace sensor. (*)
Defective monitor Replace monitor. (*)
OPERATION TROUBLES AND ACTIONS
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