Hyundai HX130LCR Manual page 142

5. MAIN RELIEF PRESSURE CHANGE SYSTEM
TURNING
JOINT
(2)
Pb1
SWING ARM BUCKET
P T
(1) (3) (2) (4) (3)
SH
E PS
A c B e1 D F
Pc3
d1
a b d
PS e e2
PS
Pd2 Pc2 Pa5
Pd40 Pd41
Pb3 Pc40 Pc41 Pc42
When the power boost switch on the left control lever is pushed ON, the power boost solenoid valve
is actuated, the discharged oil from the pilot pump flows into Pu port of the main relief valve of main
control valve; then the setting pressure of the main relief valve is raised from 330 kgf/cm
360 kgf/cm (5120 psi) for increasing the digging power.
2
And even when pressed continuously, it is canceled after 8 seconds.
When the auto power boost function is selected to enable on the cluster, the pressure of the main
relief pressure is automatically increased to 360 kgf/cm
It is operated max 8 seconds.
C6
D6
Pc6
Pd6
Puo
C5
D5
Pc5
Pd5
DR5
Po5
C4
D4
DR3
Pc41
Pc40
Pd40
V3
Pc3
DR2
Pa21
C2
D2
Pc2
Pd2
DR4
P03
C1
D1
Pc1
Pd1
TRAVEL
P T
DR0
P0
PS
Ai
(1) (4) (3)
Pa1 Pd1 Pc1
BOOM
P T
P2 P2 P3 P3
P1 P1
Dr4 Dr4
T1 T1
(1) (2)
(4)
T2 T2 T3 T3
Po5
Dr3
Dr5
PS J
G H
P03 P03 Pb4 Pb4
h2
h1
(MCV) (MCV) (MCV) (MCV)
g j
f h
A4 A4
Pb5
Pb20 Pb21
T T
P04 Pa20 Pa21
BOOM PRIORITY
EPPR VALVE
Rs
OPTION C
(DOZER)
OPTION B
ARM 1
BOOM 2
SWING
TRAVEL
RIGHT
TRAVEL
STRAIGHT
Pd0 P2 P1
P3
PG(S/Motor) PG(S/Motor)
P0(MCV) P0(MCV)
P4 P4
P02(MCV) P02(MCV)
P5 P5
T5 T5
T4 T4
Pa4 Pa4
P P Pu Pu
(T/Joint) (T/Joint) (MCV) (MCV)
A1 A1
A3 A3 A2 A2 A1 A1
P(F/CNTL
P3 P3
EPPR)
P2 P2
P1
POWER BOOST
SOLENOID VALVE
(5120 psi) as working condition by the MCU.
2
3-10
Pi1(Pump) Pi2(Pump)
Pn2
Pn1
B5
A5
Pb5
Pa5
BUCKET
P04
B4
Pb4
Pa4
ARM
Pc42
REGEN
Pb3
ARM 2
Pd41
Pb21
DR1
Pb20
Pa20
BOOM 1
P02
Patt
Pb1
Pa1
TRAVEL
LEFT
T1
Dr#, dr#
130ZF3HC06
(4690 psi) to
2
B2
A2
PS
B1
A1