Hyundai HX140L, Manual

Page: 443 / 819

YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
6-11
YES
Is MCV pilot
pressure same
for LH and RH?
Clogged or oil
leak.
Check if pilot
piping is clogged
or does have oil
leakage.
Does swing control
valve spool move?
Does symptom
change when LH
and RH port
relief valves are
exchanged?
SWING MOTION IS IMPOSSIBLE IN ONE DIRECTION 3)
Is swing control
valve's return
spring normal?
Is gear pump pilot
pressure within
standard level?
Does swing spool
move?
Is MCV pilot
pressure within
standard value?
MACHINE SWINGS BUT DOES NOT STOP 4)
Pilot relief valve is
faulty.
Gear pump is
broken.
RCV is faulty.
Swing spool is
stuck.
Return spring is
faulty.
Disassemble
and repair or
replace.
Disassemble
and repair.
Disassemble
and repair.
Disassemble
and repair.
Disassemble
and replace.
Swing port relief
valve is faulty.
Shuttle valve is
faulty.
Swing control valve
spool is stuck.
RCV is faulty.
Disassemble
and repair.
Disassemble
and repair.
Disassemble
and repair.
Disassemble
and repair.
Clean pilot piping
interior or repair
piping.
Cause Remedy
Cause Remedy
NO
See Note 2
See Note 2 See Note 1