TROUBLES AND ACTIONS OPERATION
3-130
Chassis 3
q ( ): Always contact your Komatsu distributor when dealing with these items.
q In cases of abnormalities or causes which are not listed below, contact your Komatsu distributor for repairs.
Problem Main causes Remedy
Speed of travel, swing, boom, arm,
bucket is slow
•Lack of hydraulic oil •Add oil to specified level, see
CHECK BEFORE STARTING
Pump generates abnormal noise
(sucking in air)
•Clogged element in hydraulic tank
strainer, lack of oil
•Clean, see EVERY 2000
HOURS SERVICE
Excessive rise in hydraulic oil tem-
perature
•Loose fan belt
•Dirty oil cooler
•Lack of hydraulic oil
•Check fan belt tension, replace
•Clean, see EVERY 500 HOURS
SERVICE
•Add oil to specified level, see
CHECK BEFORE STARTING
Track comes off
•Track too loose •Adjust track tension, see WHEN
REQUIRED
Abnormal wear of sprocket
Bucket rises slowly, does not rise
•Lack of hydraulic oil •Add oil to specified level,
CHECK BEFORE STARTING
Does not swing •Swing lock switch still applied •Turn swing lock switch OFF
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