Hyundai HX145LCR Manual page 170

4. TRAVEL SPEED CONTROL SYSTEM
LH
T*
Ps
DR
REG
MB MA
VB VA
P2(BW) P1(FW)
P
DR
(2)
Pb1
SWING ARM
P T
(3) (2) (4)
(1)
SH
A c B e1 D E
Pc3
d1
a d
PS b
e
PS
Pd2 Pc2
Pd40 Pd41
Pb3 Pc40 Pc41 Pc42
When the travel speed solenoid valve was placed in the Hi position, the pressure oil from pilot pump
through line filter flows to port Ps of travel speed change over valve, and the control piston is pushed
up, thus minimizing the displacement.
When the travel speed solenoid valve was placed in the Lo position, the oil of Ps port return to the
tank and the control piston is returned, thus maximizing the displacement.
RH
DR Ps
REG
MA MB
VA VB
P1(BW) P2(FW)
TURNING
JOINT
T TRAVEL
P
(3)
(1) (4)
Pa1 Pd1 Pc1
BUCKET BOOM
P T
Dr4
(3) (1) (2) (4)
PS F G H PS J
h1 h2
g
h j
e2 f
Pa5 Pb5
Pb20 Pb21
T
P04 Pa20 Pa21
C6
D6
Pc6
OPTION C
Pd6
(DOZER)
Puo
C5
D5
Pc5
OPTION B
Pd5
DR5
Po5
C4
D4
DR3
Pc41
Pc40
Pd40
ARM 1
V3
Pc3
DR2
Pa21
BOOM 2
C2
D2
Pc2
Pd2
SWING
DR4
P03
C1
D1
Pc1
Pd1
TRAVEL
RIGHT
DR0
P0
PS TRAVEL
Ai STRAIGHT
Pd0 P1
P3
PG(S/Motor)
P0(MCV)
P2 P3 P4
P02(MCV)
P1
P5
T1 T5
T2 T3 T4
Dr3 Pa4
Po5
P03 Pb4 P Pu
(MCV) (MCV) (T/Joint) (MCV)
A1
A4 A3 A2 A1
TRAVEL SPEED
SOLENOID VALVE
3-9
Pi1(Pump)
Rs
Pn2
P2
Dr#, dr#
P(F/CNTL
EPPR)
P3
P1(T/S SOL)
P2
P1
Pi2(Pump)
Pn1
B5
A5
Pb5
Pa5
BUCKET
P04
B4
Pb4
Pa4
ARM
Pc42
REGEN
Pb3
ARM 2
Pd41
B2
A2
Pb21
DR1
Pb20
Pa20
BOOM 1
P02
PS
Patt
B1
A1
Pb1
Pa1
TRAVEL
LEFT
T1
145ZF3HC05