Daedong DSC48, Workshop Manual

Page: 237 / 290

Apr. 2007
6
-23
DSC48
[Malfunction] [Check]
Oil temperature in tank
is excessively high.
Oil level in tank
[Cause] [Action]
Insufficient Insufficient oil supplied
Oil leakage
Replenish oil
Set pressure of high
pressure relief valve Low Defective pressure set Replace high
pressure relief valve
Low pressure side
circuit of main circuit Clogged filter Replace filter
High pressure Low
Clogged strainer
High oil viscosity
Defective suction pipe
Clean strainer
Change oil
Repair and service
suction pipe
Charge pump inlet
pressure
Defective pipe
Defective low pressure
relief valve
Defective HST inner
part
Repair booster pipe
Clean seats, replace
valve
Replace HST
OK
Low pressure side
circuit of main circuit Defective Defective seat
(dust, crack)
Incorrect operation
due to dust and chip
Clean or replace
check valve
Clean or replace
check valve assembly,
neutral valve assembly
OK
OK
Clogged oil cooler
Charge pump output
pressure
Clogged cooler core
Clogged oil hole in
cooler
Clean core with
compressed air
OK
OK
Low