Hyundai HX130LCR Manual page 164

7. COMBINED ARM AND TRAVEL OPERATION
TURNING
JOINT
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.
C6
D6
Pc6
OPTION C
Pd6
(DOZER)
Puo
C5
D5
Pc5
OPTION B
Pd5
DR5
Po5
C4
D4
DR3
Pc41
Pc40
Pd40
Pd41
ARM 1
V3
Pc3
DR2
Pa21
Pa20
BOOM 2
P04
C2
D2
Pc2
Pd2
SWING
DR4
P03
C1 C1
D1
Pc1
Pd1
TRAVEL
RIGHT
DR0
P0
PS
Ai
Pd0 P3 P2 P1
3-32
Pi1(Pump) Pi2(Pump)
Rs
Pn2
Pn1
BUCKET
ARM
REGEN
ARM 2
BOOM 1
TRAVEL
LEFT
B5
A5
Pb5
Pa5
P04
B4
Pb4
Pa4
Pc42
Pc40
Pc41
Pb3
Pd41
B2
A2
Pb21
DR1
Pb20
Pa20
P02
PS
Patt
B1
A1
Pb1
Pa1
T1
130ZF3HC29