Group 5 Combined Operation - Hyundai HX140L Manual

GROUP 5 COMBINED OPERATION

1. OUTLINE
TURNING
JOINT
The oil from the A1 and A2 pump flows through the neutral oil passage, bypass oil passage and
confluence oil passage in the main control valve. Then the oil goes to each actuator and operates
them. Check valves and orifices are located on these oil passage in the main control valve. These
control the oil from the main pumps so as to correspond to the operation of each actuator and
smooth the combined operation.
STRAIGHT TRAVEL SPOOL
This straight travel spool for straight travel is provided in the main control valve.
If any actuator is operated when traveling, the straight travel spool is pushed to the right by the pilot
oil pressure.
Consequently, the left and right travel oil supply passage are connected, and equivalent amount of
oil flows into the left and right travel motors. This keeps the straight travel.
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
D1
Pc1
Pd1
TRAVEL
RIGHT
DR0
P0
P02
PS
Ai
Pd0
P3 P1
3-27
Pi1(Pump) Pi2(Pump)
Rs
Pn2
Pn1
BUCKET
ARM
REGEN
ARM 2
BOOM 1
TRAVEL
LEFT
P2
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
140L3HC23