TM 5-3805-258-24-1
O P E R A T O R ’ S S T A T I O N
S Y S T E M S O P E R A T I ON
E L E C T R I C A L S Y S T EM
(1) Main Power Relay (7N5933) 950BNS and
(10) 8 Amp Circuit Breaker (3R8920)
(3T376 950BNSCE and 950BSCE)
This circuit breaker is for the protection of the
The main power relay sends power to most of the
main power key switch. It also permits current to
circuits of the machine when the main power key
flow to the 3 Amp Circuit Breaker for the Engine
switch is turned ON.
Stop Relay.
(2) Start Relay (9F3099)
When the main power key switch is turned to the
START position, the start relay is activated. The
start relay sends power to the starter solenoid which
activates the starter motor.
(3) Diode Assembly B
The purpose of the diodes in this assembly is to
permit current flow in only one direction.
(4) Engine Stop Relay (3T689)
Power to activate this relay is sent from the Power
Key Switch. When activated, the relay will activate
the fuel shut-off solenoid. This will stop the engine.
(5) Start Protect And Service Meter Relay
(9G1928)
The current to activate this relay is sent from the
Alternator. When it is activated the relay removes
the current being supplied to the starter relay; stop-
ping the engine from cranking, and supplies it to the
Service Meter.
(6) 8 Amp Circuit Breaker (3R8920)
This breaker permits the current to flow to the
turn signals and flashers (attachments).
(7) 3 Amp Circuit Breaker (7N1621)
This circuit breaker gives protection and allows
current to flow to the Engine Stop Relay and the Fuel
Shut-off Solenoid.
(8)
(9) 60 Amp Circuit Breaker (2V2380)
Current from the main power relay is sent through
the 60 amp circuit breaker, to the fuses and most
other circuits.
3-140
