Komatsu GD555-5 Operation & Maintenance Manual page 240

OPERATION
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
Even when engine is running,
machine does not move
Even when engine is run at full
throttle, machine moves slowly,
lacks power
More noise than usual is generated
from power train
Abnormal wear of front tires
Heat generated from front wheel hub
Front wheels wobble when traveling
Steering wheel is heavy
Main causes
Gear shift lever is not in the
proper position
Transmission oil pressure does
not rise
Lack of oil in transmission case
Wear, scuffing of transmission
pump
Leakage of oil from oil line
Clogged transmission filter
element
Defective operation of
transmission, control valve
Defective return of parking brake
Problem in transmission control
Lack of oil in transmission
Clogged transmission oil filter
cartridge
Defective return of parking brake
Improper adjustment of engine
Lack of oil in transmission case,
tandem case
Incorrect adjustment of toe-in
Lack of inflation pressure
Loose bearing preload adjustment
nut for front wheel
Lack of grease
Incorrect adjustment of toe-in,
loose tie rod
Inflation pressure of left and right
tires not same
Wheel not properly installed
Loose front wheel bearing
mounting nut
Defective Orbit-roll
Defective adjustment of priority
valve
Lack of hydraulic oil
TROUBLESHOOTING
Remedy
Set lever to the proper position
( Check, adjust)
Add oil to specified level.
For details, see EVERY 250
HOURS SERVICE.
( Check, replace)
( Check, repair)
Clean, replace.
For details, see EVERY 500
HOURS SERVICE.
( Check, repair)
( Check, repair)
( Check, repair)
Add oil to specified level.
For details, see EVERY 250
HOURS SERVICE.
Clean, replace.
For details, see EVERY 1000
HOURS SERVICE.
( Check, repair)
( Check, repair)
Add oil to specified level.
For details, see EVERY 250
HOURS SERVICE.
Adjust. For details, see
EVERY 1000 HOURS
SERVICE.
Check, adjust
( Check, adjust [adjust bearing
preload])
Supply grease
Adjust. For details, see
EVERY 1000 HOURS
SERVICE.
Inflate tires to same air
pressure
Install again. For details,
see HANDLING TIRES.
( Adjust)
( Adjust)
( Check, repair)
Add oil to specified level.
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