Troubleshooting Chart - Komatsu 530M Operation & Maintenance Manual

Maintenance - Section 4
Page 4-22
If the following procedures do not correct the problem, contact a factory authorized service center. When submitting
equipment to be repaired, be sure to state the nature of the problem and indicate if a repair cost estimate is required.
POSSIBLE CAUSES
TROUBLE: Pump Does Not Operate.
Lube system not grounded.
Electrical power loss.
Timer malfunction.
Solenoid valve malfunctioning.
Pump malfunction.
NOTE: On intial startup of the lube system, the timing capacitor will not contain a charge, therefore the first timing
cycle will be about double in length compared to the normal interval. Subsequent timer cycles should be as specified.
TROUBLE: Pump Will Not Prime
Low lubricant supply.
Dirt in reservoir, pump inlet clogged.
Pump Jammed.
TROUBLE: Pump Will Not Build Pressure
Air trapped in lubricant supply line.
Lubricant supply line leaking.
Vent valve leaking.
Pump cylinder worn or scored.
Reservoir empty.
TROUBLE: Injector Indicator Stem Does Not Operate
NOTE: Normally, during operation, the injector indicator stem (1, Figure 4-8) will move into the body of the injector
when pressure builds properly. When the system vents (pressure release) the indicator stem will again move out into
the adjusting yoke.
Malfunctioning injector - usually indicated by the pump
building pressure and then venting.
All injectors inoperative -
Whole series of injectors inoperative -

TROUBLESHOOTING CHART

Correct grounding connections to pump assembly and
truck chassis.
Locate cause of power loss and repair.
24 VDC power required. Be sure keyswitch is "ON".
Replace timer assembly
Replace the solenoid valve assembly
Replace pump assembly
Fill Reservoir.
Clean pump and reservoir.
Remove source of contamination.
Repair/replace pump assembly.
Prime system to remove trapped air.
Check lines and connections to repair leakage.
Clean or replace vent valve.
Repair or replace pump cylinder or pump assembly.
Fill Reservoir.
Replace individual injector assembly.
Pump build up not sufficient to cycle injectors.
Repair/replace pump assembly. Also check pump
cylinder pressure and line pressure at pump.
Check for broken or clogged intermediate supply line
and replace.
Automatic Lube System
SUGGESTED CORRECTIVE ACTION
OM4006.2 10/98