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