Komatsu ecot3 WA430-6 Operation & Maintenance Manual page 232

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
Transmission
Engine is running but machine
does not move
Even when engine is run at full
throttle, machine only move
slowly and lacks power
Oil overheats
Noise generated
Axle
Noise generated
Brake
Brake is not applied when pedal is
depressed
Brake drags or remains applied
Brakes squeal
Main causes
Parking brake is applied
Directional lever is not shifted
properly
Lack of oil in transmission case
Lack of oil in transmission case
Screen is clogged
Too much oil or too little oil in
transmission case
Machine is not traveling in correct
speed range
Torque converter is stalled for
long periods
Engine is overheating
Lack of oil in transmission case
Lack of oil
Improper oil used (for machines
with limited-slip differential)
Disc has reached wear limit
Lack of oil in hydraulic tank
Air in brake line
Vent hole of brake valve is
clogged
Disc is worn
Large amount of water in axle oil
Deteriorated axle oil due to
overuse of brake
TROUBLESHOOTING
Remedy
Release parking brake
Shift lever properly
Add oil to specified level. See
WHEN REQUIRED
Add oil to specified level. See
WHEN REQUIRED
( Disassemble, clean)
Add or drain oil to specified level.
See WHEN REQUIRED
Place in correct speed range
Reduce stall time
( Check engine)
Add oil to specified level. See
WHEN REQUIRED
Add oil to specified level.
See WHEN REQUIRED
Change to specified oil
( Replace disc)
Add oil to specified level. See
EVERY 100 HOURS
Bleed air
Clean
( Replace disc)
Change axle oil
Change axle oil
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