Hyundai HX130LCR Manual page 338

3) MACHINE DOES NOT STOP ON A SLOPE
Machine is pulled forward as sprocket rotates during digging operation.
Check if parking
YES
brake pilot line is
clogged.
Is drain rate of
Is travel brake
travel motor
YES
pressure within
within standard
standard level?
value?
SPEC : 14.3 kgf/cm 2
NO
4) LH AND RH TRAVEL MOTIONS ARE IMPOSSIBLE
YES
Is bucket or arm
operation
possible?
Check oil volume
in hydraulic oil
NO
tank.
Is parking brake
None
YES
friction plate
worn?
Clogged
NO
OK
Remove dust
plug under engine
flywheel and
OK
check that there is
no coupling
element particles.
Short
6-15
Friction plate is
faulty.
Travel motor is
defective.
Brake valve is
faulty.
OK
Hydraulic pump is
faulty.
Disassemble both
travel relief valves
and inspect for
any fault.
Travel relief valve
Faulty
is faulty.
Coupling at pump
Particles present.
connection is
broken.
Cause Remedy
Disassemble
and repair.
Disassemble
and clean pilot
piping.
Disassemble
and repair.
Disassemble
and repair or
replace.
Cause Remedy
Inspect according
to the procedure
"Travel does not
function at all on
one side."
However, a case
where both LH
and RH travel
motions are
disabled is
extremely seldom
statistically.
Disassemble
and repair.
Disassemble
and repair or
replace.
Disassemble
and repair.
Replenish
hydraulic oil.