Komatsu PC400LC-5 Operation & Maintenance Manual page 141

16. TROUBLESHOOTING
16.6.2 CHASSIS
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(
):
Always contact your Komatsu distributor when dealing with these items.
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In cases of abnormalities or causes which are not listed 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 temperature
Track comes off
Abnormal wear of sprocket
Bucket rises slowly, does
not rise
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Main causes
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Lack of hydraulic oil
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Clogged element in hydraulic
tank strainer
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Loose fan belt
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Dirty oil cooler
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Lack of hydraulic oil
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Track too loose
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Lack of hydraulic oil
Remedy
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Add oil to specified level,
see CHECK BEFORE
STARTING
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Clean, see EVERY 2000
HOURS SERVICE
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Adjust fan belt tension,
see EVERY 250 HOURS
SERVICE
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Clean, see EVERY 500
HOURS SERVICE
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Add oil to specified level,
see CHECK BEFORE
STARTING
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Adjust track tension, see
WHEN REQUIRED
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Add oil to specified level,
see CHECK BEFORE
STARTING
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