ELECTRICAL SYSTEM
B1220, B1620, B1820, WSM
9-M7
(EU)
(2) With OPC Type
B1220 tractor 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).
Engine starting is operated by starter motor after current flowing from the starter relay to the start motor.
Engine stopping is operated by the key stop solenoid after current flowing from the timer relay (the key stop
solenoid relay) to the key stop solenoid.
When the main switch is turned to the
PREHEAT
position, the terminal
B
is connected to the terminals
19
and
AC
. The glow plugs become red-hot, and at the same time, the glow plug indicator also lights on.
When the main switch is then turned to the
START
position with the safety switches on, the terminal
B
is
connected to the terminal
50
and
AC
. Consequently, battery current flows to the starter motor and start the engine.
The main switch automatically returns to the
ON
position, the terminal
B
is connected only to the terminal
AC
,
thereby causing the starting circuit to be opened, stopping the starter motor.
9Y1210272ELM0024US0
(1) Timer Relay 2
(2) Fuse Box
(3) Joint Connector
(4) Relay
(5) Relay
(6) Main Switch
(7) Parking Brake Switch
(8) Seat Switch
(9) Frame Earth
(10) Glow Plug
(11) Slow Blow Fuse (50 A)
(12) Battery
(13) Starter
(14) Key Stop Solenoid
(15) Timer Relay
(16) Main Gear Shift Switch
(17) PTO Switch
(18) Starter Relay
KiSC issued 07, 2011 A
Summary of Contents for B1220
Page 1: ...WORKSHOP MANUAL TRACTOR B1220 B1620 B1820 KiSC issued 07 2011 A ...
Page 3: ...I INFORMATION KiSC issued 07 2011 A ...
Page 9: ...INFORMATION B1220 B1620 B1820 WSM I 5 EU 9Y1210272INI0002US0 KiSC issued 07 2011 A ...
Page 13: ...G GENERAL KiSC issued 07 2011 A ...
Page 68: ...1 ENGINE KiSC issued 07 2011 A ...
Page 126: ...2 CLUTCH KiSC issued 07 2011 A ...
Page 127: ...CONTENTS 1 LINKAGE MECHANISM 2 M1 MECHANISM KiSC issued 07 2011 A ...
Page 141: ...3 TRANSMISSION KiSC issued 07 2011 A ...
Page 177: ...4 REAR AXLE KiSC issued 07 2011 A ...
Page 178: ...CONTENTS 1 STRUCTURE 4 M1 MECHANISM KiSC issued 07 2011 A ...
Page 186: ...5 BRAKES KiSC issued 07 2011 A ...
Page 203: ...6 FRONT AXLE KiSC issued 07 2011 A ...
Page 204: ...CONTENTS 1 STRUCTURE 6 M1 MECHANISM KiSC issued 07 2011 A ...
Page 218: ...7 STEERING KiSC issued 07 2011 A ...
Page 244: ...8 HYDRAULIC SYSTEM KiSC issued 07 2011 A ...
Page 274: ...9 ELECTRICAL SYSTEM KiSC issued 07 2011 A ...
Page 277: ...ELECTRICAL SYSTEM B1220 B1620 B1820 WSM 9 M2 EU 2 B1220 WITH OPC TYPE KiSC issued 07 2011 A ...