ZW250-6 HYDRAULIC CIRCUIT DIAGRAM (1/2) Ride control accumulator (99) Steering pilot valve (14) R
L
Pc1
Stop valve (15)
A
A
Dr
D
B
SX
SZ 36.3MPa
B
Steering valve cylinder (8)
Accumulator assy(steering) (10)
SZ
P
Dr
SJ
Pib2
(RH) G1/4
G1/4
A
B
B2 0.03MPa
0.2L 8.0MPa
(LH)
Pia2
DY2
Ride control solenoid valve (44)
SY
34.4 MPa at 50L/min
34.4 MPa at 50L/min
A2
0.6MPa
Accumulator assy(steering) (10)
0.2L 8.0MPa
32.4MPa
Steering valve (4)
Bucket cylinder (7)
A1
0.6MPa
DY1
B1
32.4MPa Pb
Pa
Lift arm cylinder (5)(6)
ACC
SA
UP
Stop valve (15)
2.5L 3.0MPa
DUMP ROLL BACK
T Ls
Pc2
DOWN
P
0.03MPa
T Pib1
Ls
Pia1
For emergency steering
Multiple control valve (3)
ON: 0.49 0.1MPa OFF: ON Pressure -0.3MPa above PS
Pressure sensor (54)
Dr
Emergency steering block P1
P2
PES M18
T3
29.4MPa
49MPa
0.2MPa
Pressure sensor (52)
T1 P
T2
4.9MPa
Pressure sensor (51)
C4 B4
S4
B3 CF
EF
LS 4.9MPa 29.4MPa
Emergency (secondary) steering pump (91)
Filter (81) Pi1
Pi2
G1
(To 2/2) (To 2/2) (To 2/2) (To 2/2) (To 2/2) (To 2/2)
Pg VQ 0.5MPa ST
Dr
M
(b1) 1 DUMP
2 (a1) ROLL BACK
(b2) 3 DOWN
4 (a2) UP
T
M Sp
(Pilot pump)
M
Control valve assy (72)
11 0.39MPa
Main pump (1)
Pressure sensor (52)
Hydraulic oil cooler (To 2/2)
Breather valve assy (21)
P2
P1
B
A
Suction strainer (83)
Return filter (12) 0.15±0.02MPa
TTNEM50-EN-01_Circuit
50.0kPa
B1
A1
Flow control valve assy (19)
PA
49MPa 18.2MPa at 20L/min P
4.0kPa
A2
Pressure sensor (51)
T
S M18
Hydraulic oil tank
B2
S1
49MPa
Fan pump (2)
S3
Dr
Pilot valve (16)
(To 2/2)
10.0MPa
A3
4.9MPa
CW/CCW
Fan motor (71) P
A4
Pi
Dr