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OPERATION
TROUBLES AND ACTIONS
Chassis
( ): Always contact your Komatsu distributor when dealing with these items.
In cases of problems 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
temperature
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
Boom 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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