Hyundai HX145LCR Manual page 361

2) 2) ENGINE STARTS BUT MACHINE DOES NOT OPERATE AT ALL ENGINE STARTS BUT MACHINE DOES NOT OPERATE AT ALL
NO
Is oil level in
hydraulic oil
tank within
standard level?
Do not hydraulic
pump and pump
connections
YES
make abnormal
noise?
Abnormal noise
YES YES
comes out of
hydraulic pump
Abnormal noise
YES YES
comes out of
pump
connection
Is pilot pump
pressure within
NO
standard level?
See Note 1
Is pilot piping
clogged or is oil
YES
leakage present
on pilot piping?
ⓐ
Is gear pump
delivering oil?
NO
6-6
Cause
Hydraulic pump is
broken.
ⓐ
YES
RCV and safety
NO
solenoid valve is
faulty.
YES
Pilot relief valve in
gear pump is
faulty.
Gear pump is
NO
broken.
Remedy
Replenish
specified oil to
the standard
level.
Disassemble
and repair.
See item 1).
at page 6-5
Clean pilot
piping interior or
repair piping.
Disassemble
and repair.
Repair or
replace.
Disassemble
and repair.