Komatsu PC20R-8 Shop Manual page 109

ELECTRICAL DIAGRAM (1/3)
1 2 3
A2.5
R1 ACC
BR
OFF ACC
R1
ST
S1
X2
X-K1
2
K1
X-K1
1
4
X-K1
3
FUG
X-K1
60A
X1
G1
12 Vcc
X28
M1
30 50
M
31
COMPONENTS:
G1 BATTERY
G2 ALTERNATOR
H1 AIR FILTER CLOGGING WARNING LIGHT
(NOT USED)
H2 PRESSURE OIL WARNING LIGHT
H3 BATTERY WARNING LIGHT
H4 PRE-HEATER WARNING LIGHT
H5 BRAKE PRESSURE WARNING LIGHT
(NOT USED)
H6 OIL LEVEL WARNING LIGHT
(NOT USED)
H7 POSITION LIGHT WARNING LIGHT
(NOT USED)
PC20R-8 PC27R-8
4 5 6 7 8
2
X10
FU2 FU9
3A 7.5A
R2 C
B
1
X10
3
R1.5
X10
2.15
X11 X11
2 3
4
X5 KT1
6
X10
4
X11 X11
1
1 2 3 9 2 4
X1 X4 X4 X4
X1 S2
1 X3 X3
G2
V1
30 G
3
U
R1
31
H8 DIRECTION INDICATOR WARNING LIGHT S1
(NOT USED)
S2
H9 DASHBOARD LIGHT
S3
HA1 BUZZER
S4
K1 STARTER RELAY
V1
KT1 PRE-HEATER TIMER
Y2
M1 STARTER MOTOR
P1 TERMOMETER
P2 LEVEL INDICATOR
P3 COUNTER-HOUR
P4 INSTRUMENT PANEL
R1 PRE-HEATER
R2 WATER TEMPERATURE WATER
9 10 11 12 13
B - N1
G1
M - V1
HA1
X5
R1 10
X5
11
12
X5
13
3
7
X7
1
5 4 8
X4 X4 X4
1
X8
Y1
S3 S4 R2
p t
t
X8
2
DASHBOARD
PUSH-BUTTON
LOW PRESSURE ENGINE OIL PRESSURE SWITCH
HIGH WATER TEMPERATURE TERMOSTAT
TRAVEL INCREMENT SOLENOID VALVE DIODE
TRAVEL INCREMENT SOLENOID VALVE DIODE
14 15 16 17 18
3.9
2.12
H1 H2 H3 H4
X6
S1
1
X6
2
X6
R1
3
X6
4
X6
5
H5 H6 H7 H8
X6
M1
6
X6
B - G1
7
X6
9
X6
10
X6
N1
11
X6
G1
12
X6 P1 P2 P3
B - N1 13
X5
X6
C/N1
14 q
t° h
X5 X6
C - N1 15
X5 X6
16
P4
CONNECTORS: FUSES:
X1 4-WAYS CONNECTOR FU2 FUSE 3A
X2 2-WAYS CONNECTOR
FU9 FUSE 7.5 A
X3 2-WAYS CONNECTOR
X4 9-WAYS CONNECTOR MARK
X5 13-WAYS CONNECTOR MARK
FUG GENERAL FUSE 60A
X6 16-WAYS CONNECTOR FKI INSTRUMENT
X7 5-WAYS CONNECTOR
X8 2-WAYS CONNECTOR DEUTSCH
X10 4-WAYS CONNECTOR
X11 4-WAYS CONNECTOR
X28 1-WAY CONNECTOR
X-K1 4-WAYS CONNECTOR
19 20
A2.5
2.1
A2.5
2.1
H9
00000 00 h
31
2.1
RKP06570
(BUZZER - STARTER RELAY - INSTRUMENT)
(ALTERNATOR - TRAVEL INCREMENT
SOLENOID VALVE)
10-91