9-M3
L2800, L3400, WSM
ELECTRICAL SYSTEM
2. OPERATOR PRESENCE CONTROL
The tractor equips operator presence control (OPC)
system which automatically stops the engine when
operator stands from the seat while shifting the PTO
lever, shuttle lever or HST pedal.
This system is controlled by the seat switch (3), OPC
timer (6), key stop solenoid relay (7), key stop solenoid
(8), PTO switch (4) and range gear shift switch (5).
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Electric Circuit
1. When sitting on the seat in the state of main switch
ON, the battery voltage passes the seat switch (3)
and the OPC timer (6), and maintain the key stop
solenoid relay (7).
2. When standing from the operators seat, the circuit
from the seat switch (3) to the OPC timer is cut.
However, if the levers (or pedal) are set at a neutral
position, the circuit from the battery to the key stop
solenoid relay (7) is formed with the lever switches
(4), (5).
3. When standing from the seat while shifting the levers,
the circuit from the battery to the key stop solenoid
relay is cut, and the engine is stopped by function of
key stop solenoid (8).
■
OPC Timer
After the current supply cuts, the OPC timer (6)
adopted for this system has maintained the state of ON
position for about one second.
■
Seat Switch
The seat switch (3) has two ON positions. One is
sitting condition, and another is condition of seat lifting.
Therefore, if the engine is started, levers are shifted
to neutral, it gets off from the tractor, and the seat is tilted
forward, the PTO operation etc. become possible.
W1012717
(1) Battery
(2) Main Switch
(3) Seat Switch
(4) PTO Switch
(5) Range Gear Shift Switch
(6) OPC Timer
(7) Key Stop Solenoid Relay
(8) Key Stop Solenoid
(9) Sensor Bar
a : Sitting on the seat
b : Lifting the seat
A : Seat Switch is ON
B : Seat Switch is OFF
C : Seat Switch is ON
D : Seat Suspension Plate
KiSC issued 08, 2007 A
Tractor Manuals Scotland - Please Do Not Copy
Tractor Manuals Scotland
