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6-14
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Is the lower
speed (bucket or
arm) within
standard level?
Does the symptom
change when
relief valves in
LH and RH
travel motors are
exchanged?
Does travel speed
change when
parking brake
spring in the
travel motor is
removed?
Has travel spool
changed over
positively?
Do LH and RH
travel speeds
change over when
travel relief valves
are exchanged?
Does spool move?
YES
Brake valve is
defective.
Relief valve built
in travel motor is
faulty.
ⓐ
Control system is
faulty.
Control valve
spool is stuck.
Travel relief valve
is faulty.
Hydraulic pump is
broken.
External pilot
piping is clogged
or oil is leaking
from it.
Travel motor's
parking brake is
not released
properly.
Travel motor is
faulty.
Disassemble
and repair or
replace.
Disassemble
and repair.
Disassemble,
inspect and
repair.
Disassemble
and repair.
Disassemble
and repair or
replace.
Disassemble
and repair.
Disassemble
and clean.
Disassemble
and clean pilot
piping.
Disassemble
and repair.
ⓐ
SPEED ON ONE SIDE FALLS AND THE MACHINE CURVES
2)
Is external pilot
pressure within
standard level?
Is drain rate of
travel motor within
standard level?
Cause
Remedy
YES
YES
YES
NO
Do LH and RH
travel speeds
change when LH
and RH travel
brake valves are
exchanged?
Does the symptom
change when A1
and A2 pump
discharge hoses
are exchanged?
See Note 5, 6
Summary of Contents for HX130 LCR
Page 11: ...1 1 SECTION 1 GENERAL Group 1 Safety Hints 1 1 Group 2 Specifications 1 10 ...
Page 174: ...4 5 MEMORANDUM HYUNDAI HEAVY INDUSTRIES CO LTD CONSTRUCTION EQUIPMENT DIV ...
Page 536: ...8 108 125LCR8TM30 Turn casing 1 upside down and remove oil seal 3 using jig 29 ...
Page 566: ...8 138 Remove lock nut 22 and then boot 23 14 36078RL14 2507ARL10 ...