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3-32
BOOM 1
SWING
BOOM 2
ARM 1
OPTION B
OPTION C
(DOZER)
ARM
BUCKET
ARM 2
REGEN
RIGHT
LEFT
TRAVEL
TRAVEL
Pu
P1
P2
P3
Pd0
Pb1
A1
Pa1
T1
Pc1
D1
C1
P0
DR0
Pd1
Ai
PS
STRAIGHT
TRAVEL
SPOOL
A1
PUMP
A2
PUMP
PILOT
PUMP
HYDRAULIC TANK
Pc42
Pb3
Pd41
B2
A2
B1
V3
Pd2
Pc2
B4
B5
A5
Pa5
Pb5
Pa4
Pb4
C5
D5
Pc41
Rs
C6
D6
DR4
P03
Patt
P02
Pn2
Pn1
Po5
Puo
P04
DR2
Pc3
Pb21
Pb20
Pa20
DR1
DR5
DR3
Pc40
Pd40
PS
Pi1(Pump)
Pi2(Pump)
BUCKET
CYLINDER
BOOM
CYLINDER
HYDRAULIC TANK
Pd41
Pc40
Pc41
ARM
CYLINDER
DOZER
CYLINDER
TURNING
JOINT
TRAVEL MOTOR
SWING MOTOR
D2
C2
C1
D4
C4
Pa21
Pa20
P04
Pc5
Pd5
Pd6
Pc6
When the arm and travel functions are operated simultaneously, the arm spools and travel spools in
the main control valve are moved to the functional position by the pilot oil pressure from the remote
control valve and the straight travel spool is pushed to the right by the oil pressure from pilot pump.
The oil from the A1 pump flows into the travel motors through the RH travel spool of the left control
valve and the LH travel spool of the right control valve via the straight travel spool.
The oil from the A2 pump flows into the arm cylinders through the arm 1 spool and arm 2 spool via
the parallel and confluence oil passage.
When the pressure of the travel motors is lower than the pressure of the arm cylinder, some oil from
the A2 pump flows into the travel motors through the check valve and orifice in the straight travel
spool. This prevents the rapid slowdown of the travel.
The arm is operated and the machine travels straight.
7. COMBINED ARM AND TRAVEL OPERATION
130ZF3HC29
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 ...