Komatsu PC290LC-6K Operation & Maintenance Manual page 142

16. TROUBLESHOOTING
16.6.2 CHASSIS
• ( ): Always contact your Komatsu distributor when dealing with these items.
• 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
2-98
Main causes
• Lack of hydraulic oil
• Clogged element in hydraulic tank
strainer
• Loose fan belt
• Dirty oil cooler
• Lack of hydraulic oil
• Track too loose
• Lack of hydraulic oil
Remedy
• Add oil to specified level, see
"CHECK BEFORE STARTING"
• Clean, see "EVERY 2000 HOURS
SERVICE"
• Adjust fan belt tension, see "EVERY
250 HOURS SERVICE"
• 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, see
"CHECK BEFORE STARTING"