TROUBLES AND ACTIONS
OTHER TROUBLE
OPERATION
(ALL-5110-001-A-00-A)
ELECTRICAL COMPONENT • •
(D155-AK50-400-K-00-A)
As for the corrective actions indicated with (*) in the remedy column, always contact your Komatsu distributor. In cases of problems or causes which are not listed below, ask your Komatsu distributor for repairs.
Problem Lamp does not glow brightly even when the engine runs at max. speed. Lamp flickers while engine is running. Charge level monitor does not go out even when engine is running. Unusual noise is generated from alternator.
Starting motor does not rotate even when starting switch is turned ON.
Pinion of starting motor keeps going in and out. Starting motor turns engine sluggishly. Starting motor disengages before engine starts. Automatic pre-heating is not actuated. Engine pre-heating monitor does not light up. (when engine coolant temperature is -5° (27°F) or below) Oil pressure monitor does not light up when engine is stopped (starting switch at ON position) Charge level monitor does not light up when engine is stopped (starting switch at ON position) Outside of electrical heater is not warm when touched by hand.
Air conditioner malfunction
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Defective belt tension
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Defective alternator Defective wiring Defective alternator
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Check and repair loose terminal and wire breakage, and replacement of battery. (*) Check alternator belt, referring to Every 500 hours maintenance Replace (*) Check, repair (*) Replace (*)
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Check, repair (*) Charge Turn ON.
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Place it in “Normal” position.
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Defective wiring Insufficient battery charge Battery disconnect switch is OFF. Engine shutdown secondary switch is turned to “STOP ENGINE” position. Safety switch out of adjust
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Adjust safety switch. (*)
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Insufficient battery charge
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Charge
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Insufficient battery charge Defective starting motor Defective wiring Insufficient battery charge Defective wiring Defective heater relay Defective engine controller Defective wiring Defective heater relay Defective monitor
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Charge Replace (*) Check, repair (*) Charge Check, repair (*) Replace (*) Check, replace (*) Check, repair (*) Replace (*) Replace (*)
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Defective monitor Defective caution lamp switch
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Replace (*) Replace (*)
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Defective monitor Defective wiring
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Replace (*) Check, repair (*)
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Defective wiring Wire breakage in electrical intake air heater Defective operation of heater relay Blown fuse Insufficient battery charge Defective air conditioner switch Defective blower switch Defective compressor
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3-226
Remedy
Main causes Defective wiring, deterioration of battery
Check, repair (*) • Replace (*) •
Check, repair heater relay. (*)
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Check, repair (*) Charge Replace air conditioner switch. (*) Replace blower switch. (*) Replace (*)
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