Komatsu D65EX-12 Operation & Maintenance Manual page 165

TROUBLESHOOTING
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
When brake pedal is depress,
machine does not stop
Track comes off
Abnormal wear of sprocket
Blade, rises slowly, dose not rise
Dose not steer even when steering
or operated
Noise is generated from idler
Blade control lever is not held at
FLOAT position
Transmission oil pressure dose not
rise
Lacks drawber pull (cannot travel
at full speed)
Travel speed does not rise quickly
Machine dose not move off when
steering, directional and gear shift
lever is placed in gear
3-118
Main causes
Brake out of adjust, defective
brake oil pressure
Track too loose
Track too loose or too tightened
Lack of hydraulic oil
Safety lock lever in LOCK posi-
tion
Brake lock lever in LOCK posi-
tion
Defective hydraulic pressure at
steering clutch
Lack of oil in idler
Insufficient warming up
Wear, scuffing of gear pump
Lack of oil in power train case
Element strainer of oil filter in
power train case clogged
Lack of drive power from engine
Low temperature of power line oil
Lack of drive power from engine
Lack of oil in power train case
Transmission oil pressure dose
not rise
Brake lock lever in LOCK posi-
tion
Wear, scuffing of gear pump
OPERATION
Remedy
( Adjust, check, repair)
Adjust track tension, see
WHEN REQUIRED
Add oil to specified level, see
EVERY 250 HOURS SER-
VICE
Set lever in free position
Set lever in free position
( Check, repair)
Add oil to specified level, see
WHEN REQUIRED
Carry out warming-up operation
( Check, repair)
Add oil to specified level, see
CHECK BEFORE STARTING
Clean
For details, see EVERY 1000
HOURS SERVICE
See ENGINE RELATED
PARTS
Warm up machine
See ENGINE RELATED
PARTS
Add oil to specified level, see
CHECK BEFORE STARTING
See "Transmission oil pres-
sure dose not rise" above
Set lever in free position
( Check, repair)