McCulloch PM1850SBH Illustrated Parts Breakdown page 2

TRACTOR - MODEL NO. PM1850SBH (PM18H48SB), PRODUCT NO. 954 56 93-49
SCHEMATIC
A
AMMETER
(OPTIONAL)
RED
S
B
G
L
A2
IGNITION
SWITCH
IGNITION SWITCH
POSITION CIRCUIT
OFF M+G+A1
RUN/LIGHT B+A1
RUN B+A1
START B + S + A1
RED
BATTERY
RED
FUSE
WHITE
BLACK
M
CLUTCH / BRAKE
(PEDAL UP)
A1
RED
SEAT SWITCH
(NOT OCCUPIED)
GREEN
FUEL
LINE
BLUE
FUEL SHUT-OFF SOLENOID
WIRING INSULATED CLIPS
NOTE: IF WIRING INSULATED
CLIPS WERE REMOVED FOR
SERVICING OF UNIT, THEY
SHOULD BE REPLACED TO
PROPERLY SECURE YOUR WIRING.
PTO SWITCH
POSITION
"MAKE"
OFF
NONE
ON
A2+L
NONE
NON-REMOVABLE
NONE
CONNECTIONS
RED
WHITE
WHITE
C G
F
H
B
E
A
D
PTO (DISENGAGED)
GREEN
HOUR
BLUE BLACK
METER
(OPTIONAL)
IGNITION
BLACK
UNIT
CHARGING SYSTEM OUTPUT
16 AMP DC @ 3600 RPM
RED
REGULATOR
BROWN
CIRCUIT
C + G, B + H
C + F, B + E, A + D
REMOVABLE
CONNECTIONS
BLACK
SOLENOID
RED
STARTER
BLACK
ELECTRIC CLUTCH
RED
BLACK
85 86
BLACK
30
87
87A
OPERATOR
PRESENCE
RELAY #1
SPARK
PLUGS GAP
(2 PLUGS ON
TWIN CYL. ENGINES)
28 VOLTS AC @ 3600 RPM
(REGULATOR DISCONNECTED)
ALTERNATOR
HEADLIGHTS
87
87A
86 85
30
RELAY
M
BLACK
G F C
E
H
B
A
D