83
Service Manual – SC8000
Engine System, Diesel
Functional Description
Overview
The diesel SC8000 machines use a Kubota V1505-B-1 four-cylinder diesel engine to power the two hydraulic
pumps that run the machine drive wheel, scrub/sweep systems, vacuum fan motor, the scrub/sweep and
squeegee lift actuators and the steering system. A Woodward APECS 3000 Governor controls the fuel
quantity to maintain the selected RPM or shut the engine off.
Diesel Engine Starter Circuit Diagram
3
0
5
0
L
I/F
S
P
DRIVE
BOX
PIN J1-22
PIN J1-34
PIN J1-10
PIN J1-31
PIN J1-11
Battery (+) From
F1 Fuse 100A & CB6 15A
S1
K2
K3
R1
START
B1
IGN
J7-6
J7-3
J7-7
J7-8
START INHIBIT
RUN INHIBIT
J7-4
J7-2
J7-5
K2
K3
DRIVE PEDAL SENSOR
BAT -
BAT -
3
J7-1
RELAY
PCB
1
2
3
ENGINE START/RUN RELAY PCB J7 for Diesel
RUN
START
STARTER
+
BLU/PINK
ALTERNATOR
G2
GOVERNOR
A5
M3
B (+)
PINK
RED
+ + + + + +
+ + + + + +
+ + + + + +
+ + + + + + + + +
+ + + + + + + + + +
+ +
+ + + + +
+
+ +
+ + + + + +
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ + + + + +
+
+
+
+
+
+
+
+
+
+ + +
+ + + + + +
- - -
- -
+ +
