Komatsu F30791, Shop Manual

Page: 35 / 298

HYDRAULIC CIRCUIT DIAGRAM
PC20R-8
10-17
PC20R-8 PC27R-8
100 mesh
100 mesh
RKP04401
2
T
T
P
T T
P
E
Ø 1.0
S1
S
PL
P2 P1
O
M
P2 T
B
A
P
P
i2
P
A7
P3 P4 P1 P2 P2 P3 P4 P1
S P P
A1
P
A6
P
A8
P
A9
P
B1
A1 LS P
B9
A9 B9
0.2
B
S
P
T
A
0.2
B8 A8 P
B8
P
B7
A7 B7 P
B6
A6 B6 B5 A5 B3
A3
B2 A2 B4 A4
P2
T1
Ps
Ps
R/G
R/G
P1
T2
P2
P1
B1
TS
C
30 Kg/cm
2
210 Kg/cm
2
240 Kg/cm
G
F
A
C
H
D
B
E
Ø 2.0
Ø 1.0
1.5
±
0.2 bar
Hammer
Additional equipment Bucket
Boom Arm
Bucket
Open
Open
Reverse
Forwards
Reverse
Forwards
Open
Reverse
Forwards
Reverse
Forwards
Open
Raise
Lower
R.H. PPC valve
L.H. PPC valve
ST1 solenoid valve
Cylinder block
Accumulator
v = 0.35
ᐍ
PPC valve
work equipment
Bucket
cylinder
Boom
cylinder
Swing motor
Swivel
joint
Blade cylinder
Oil cooler
Hydraulic
pump
Lower
Raise
Raise
Lower
Boom swing
Curled
Left
Right
Left
Right
L.H. swing
L.H. travel
R.H. travel
Close
Close
R.H. travel motor
L.H. travel motor
Left Right
Hydraulic tank
Arm
cylinder
Boom swing
cylinder
Left
Right
Arm Swing Bucket
Close
Boom