Komatsu PC20R-8 Shop Manual page 37

PC27R-8
Hammer
P2 T B9 A9
P
i2
PPC valve
work equipment
T
P
R.H. PPC valve
Bucket
Open Close Raise
P3 P4 P1
PC20R-8 PC27R-8
Arm Boom swing
Bucket Boom
cylinder cylinder
cylinder cylinder
P B8 A8 P B7 A7 P B6 A6 P B5 A5
B9 B8 B7 B6
P A9 P A8 P A7 P A6
A
0.2
T
P
ST1 solenoid valve
Boom Arm
Lower Close
T
P
P2 P1
100 mesh
DB
Swing motor
240 o Kg/cm 2
+5
B M A
B4 A4 B3 A3 B2 A2 B1 A1 P LS
B1
P A1
Cylinder block
B
0.2
S
Accumulator
v = 0.35
L.H. PPC valve
Swing
Open Left Right
T
P
P2 P4 P3
100 mesh
Swivel
T2
joint
P1
G
F
P2
A
C
H
D
B
E P1
P2
T1
Blade cylinder
TS
C
Oil cooler
P S
P1 P2
E
MAX MIN
PL
S
Hydraulic
pump
R.H. travel motor
Ps
Reverse
Forwards
Reverse
Forwards
Ps
L.H. travel motor
1.5 ± 0.2 bar
Hydraulic tank
PS
RKP04441
10-19