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6-19
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Is speed low only
in composite
operation?
Are other
attachment
speeds within
standard levels?
Does the
symptom change
when port relief
valve is replaced
with other valve?
Is RCV normal?
Are LH/RH travel
speeds within
standard levels?
Is combination
of oil streams
normal at boom
up and at arm
extrusion?
Are both LH/RH
travel speeds
low?
Is MCV pilot
pressure within
standard?
Does spool of flow
summation check
valve move lightly
by hand?
刔
刕
Flow summation
check valve is
stuck.
Hydraulic pump is
faulty.
刖
列
Port relief valve is
faulty.
Cylinder is faulty.
MCV spool is
stuck.
RCV is defective.
Pilot relief valve is
faulty.
Gear pump is
broken.
RCV is faulty.
Normal.
Replace
spring.
Disassemble
and repair.
Disassemble
and repair.
Disassemble
and repair or
replace.
Disassemble
and repair.
Disassemble
and repair.
Clean pilot
piping interior or
repair piping.
Disassemble
and repair.
Disassemble
and repair or
replace.
Disassemble
and repair.
Adjust engine
revolution.
Clean orifice in
control valve.
Clean pilot
piping interior or
repair piping.
Disassemble
and repair.
刔
刕
刖
列
BOOM, ARM OR BUCKET SPEED IS LOW
2)
Does control
valve spool
move ?
Is not MCV pilot
pressure piping
clogged or is not
there oil
leakage?
Is gear pump
delivering oil?
Is pilot piping
clogged or is oil
leaking from the
piping?
Is MCV pilot
pressure within
standard level?
Is pilot pressure
within standard
level?
AIs engine
revolution within
standard level?
Is not orifice in
main control
valve clogged?
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
OK
See Note 3, 4
See Note 7
See Note 3, 4
See Note 1
Cause
Remedy
Содержание HX430L
Страница 11: ...SECTION 1 GENERAL Group 1 Safety Hints 1 1 Group 2 Specifications 1 10 ...
Страница 161: ...4 6 MEMORANDUM HYUNDAI HEAVY INDUSTRIES CO LTD CONSTRUCTION EQUIPMENT DIV ...
Страница 205: ...4 50 No of pin Receptacle connector female Plug connector male 14 1 7 6 14 MG610406 KET SDL CONNECTOR 13 ...
Страница 528: ...8 88 Assemble relief valve assy 45 using torque wrench ÂTightening torque 26Ü2 6 kgfÂm 188Ü18 8 lbfÂft 31 43098TM95 ...
Страница 548: ...8 108 Remove lock nut 22 and then boot 23 14 36078RL14 2507ARL10 ...
Страница 559: ...8 119 14 15 3 Install cover 3 to body 1 and tighten bolts 14 Torque 10 12 5 kgf m 72 3 90 4 lbf ft 7 21078DA10 ...
Страница 589: ...8 149 1 STRUCTURE GROUP 11 WORK EQUIPMENT B SECTION C SECTION B SECTION A C C A B A 21078DA 44 ...