ELECTRICAL SYSTEM
B2420, WSM
9-M4
[2] WITH OPC MODEL (SERIAL NUMBER ABOVE 33598)
9Y1210436ELM0023US0
B2420 tractor is equipped Operator Presence Control (OPC) system. This system will automatically stop the
engine when operator stands up from the seat while shifting the PTO gear shift lever, the main gear shift lever and
the parking brake lever.
This system is controlled by 4 switches (the rear PTO switch, the seat switch, the main gear shift switch and the
parking brake switch) and controller.
Engine starting is operated by starter motor after current flowing from the controller to the starter motor.
Engine stopping is operated by the key stop solenoid after current flowing from controller through the key stop
solenoid relay to the key stop solenoid.
9Y1210436ELM0028US0
(1) Relay
(2) Key Stop Solenoid Relay
(3) Fuse
(4) Instrument Cluster
(5) Seat Switch
(6) OPC Controller
(7) Main Switch
(8) Rear PTO Switch
(9) Main Gear Shift Switch
(10) Parking Brake Switch
(11) Frame Earth (Ground)
(12) Glow Plug
(13) Slow Blow Fuse
(14) Battery
(15) Starter Motor
(16) Key Stop Solenoid
(17) Alternator
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