Komatsu WA600-8 Operation & Maintenance Manual page 361

OPERATION
Problem
Machine moves slowly and lacks
power even with engine running at
full throttle.
Oil overheats.
Noise is generated.
Axle
Noise is generated.
Brake
Brake does not work even when ped-
al is depressed.
Brake drags or remains applied.
Brake squeals.
Steering
Steering wheel is heavy.
Steering wheel is jolting.
Parking brake
Braking effect is poor.
Main causes
Lack of oil in transmission case
Clogged screen
Lack or excess oil in transmission
case
Traveling in incorrect speed range
Too long torque converter stall opera-
tion
Engine overheating
Lack of oil in transmission case
Lack of oil in axle case
Improper oil used (for machines with
limited slip differential)
Disc has worn to wear limit.
Hydraulic oil in the hydraulic tank is
insufficient.
Air is in brake system.
Hydraulic system is defective.
Vent hole of brake valve is clogged.
Disc has worn.
Large amount of water is in axle oil
Axle oil is deteriorated due to over-
use of brake.
Hydraulic oil in the hydraulic tank is
insufficient.
Hydraulic system is defective.
Play in steering cylinder pin
Hydraulic oil in the hydraulic tank is
insufficient.
Hydraulic system is defective.
Disc has worn.
TROUBLES AND ACTIONS
Remedy
Add oil to specified level. For details,
see WHEN REQUIRED.
Disassemble and clean. (*)
Add oil to specified level or drain ex-
cessive oil. For details, see Mainte-
nance when required.
Use correct speed range.
Reduce stall time.
Check engine. (*)
Add oil to specified level. For details,
see WHEN REQUIRED.
Add oil to specified level. For details,
see WHEN REQUIRED.
Change the oil to the specified oil.
Replace disc. (*)
Add oil to specified level. For details,
see EVERY 100 HOURS MAINTE-
NANCE.
Bleed air (*)
Check, repair. (*)
Clean.
Replace disc. (*)
Change the axle oil.
Change the axle oil.
Add oil to specified level. For details,
see EVERY 100 HOURS MAINTE-
NANCE.
Check, repair. (*)
Lubricate the bearing.
Change the pins and bushings. (*)
Add oil to specified level. For details,
see EVERY 100 HOURS MAINTE-
NANCE.
Check, repair. (*)
Replace disc. (*)
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