Komatsu PW130ES-6K Operation & Maintenance Manual page 161

TROUBLESHOOTING
Problem
Starting motor does not turn when
starting switch is turned to ON
Pinion of starting motor keeps
going in and out
Starting motor turns engine slug-
gishly
Starting motor disengages before
engine starts
Pre-heating monitor does not light
Oil pressure monitor does not light
up when engine is stopped (start-
ing switch at ON position)
Outside of electrical heater is not is
warm when touched by hand
CHASSIS
( ): Always contact your Komatsu distributor when dealing
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with these items.
In cases of abnormalities or causes which are not listed
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below, please contact your Komatsu distributor for repairs.
Problem
Speed of travel, swing, boom, arm,
bucket is slow
Pump generates abnormal noise
Excessive rise in hydraulic oil tem-
perature
Bucket rises slowly, does not rise
ENGINE
( ): Always contact your Komatsu distributor when dealing
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with these items.
160
Main causes
Defective wiring
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Insufficient battery charge
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Insufficient battery charge
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Insufficient battery charge
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Defective starting motor
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Defective wiring
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Insufficient battery charge
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Defective wiring
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Defective heater relay
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Defective monitor
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Defective monitor
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Defective caution lamp
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Defective wiring
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Disconnection in electric heater
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Defective operation of heater
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relay switch
Main causes
Lack of hydraulic oil
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Clogged element in hydraulic
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tank strainer
Loose fan belt
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Dirty oil cooler
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Lack of hydraulic oil
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Lack of hydraulic oil
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Remedy
(Check, repair)
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Charge
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Charge
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Charge
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(Replace)
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(Check, repair)
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Charge
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(Check, repair)
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(Replace)
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(Replace)
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(Replace)
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(Replace)
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(Check, repair)
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(Replace)
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(Replace)
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Remedy
Add oil to specified level, see
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CHECK BEFORE STARTING
Clean, see EVERY 2000
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HOURS SERVICE
Check fan belt tension, see
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EVERY 1000 HOURS SERVICE
Clean, see EVERY 500 HOURS
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SERVICE
Add oil to specified level, see
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CHECK BEFORE STARTING
Add oil to specified level, see
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CHECK BEFORE STARTING.
OPERATION