Operator Presence Control (Opc) - Kubota BX24 Workshop Manual

BX24, RCK54(P)-23BX, RCK60B-23BX, LA240, BT601, WSM

[3] OPERATOR PRESENCE CONTROL (OPC)

The BX24 Tractor equips operator presence control (OPC) system which automatically stops the engine when
operator stands up from the operator's seat while shifting the PTO lever or the speed control pedal.
Tractor without the OPC timer stops quickly and tractor with the OPC timer stops in approximately one second
when standing up from the seat.
 Electrical Circuit (Tractor with OPC Timer)
General electrical circuit of the tractor OPC timer is
shown in the figure.
1. When sitting on the operator's seat in the state of the
main switch "ON", the battery voltage passes to the
seat switch and the OPC timer (4), and maintain the
solenoid relay (8).
2. When standing up from the operator's seat, the circuit
from the seat switch to the OPC timer is cut.
However, if the PTO lever (or the speed control pedal)
are set at "Neutral" position, the circuit from the
battery to the solenid relay (8) is formed with the PTO
switch (or HST switch).
3. When standing up from the operator's seat while
shifting the levers, the circuit from the battery to the
solenoid relay (8) is cut, and the engine is stopped by
function of the solenoid (9).
 Seat Switch
The seat switch has two positions.
When the operator's seat is occupied, the switch
contact point is at "ON" position. When the operator's
seat is not occupied, its contact point is at "OFF" position.
 OPC Timer
OPC timer is located electrically at between the seat
switch (5) and the solenoid relay (8).
When the current supply from the seat switch (5) is
cut, the OPC timer (4) adopted for the OPC system has
maintained the state of "ON" position for approximately
one second.
6-M8
ELECTRICAL SYSTEM
(1) Slow Blow Fuse
(2) Main Switch
(3) Fuse (10A)
(4) OPC Timer
(5) Seat Switch (From Seat
Switch ON or OFF)
(6) Fuse
(7) Battery
(8) Engine Stop Solenoid Timer
Relay
(9) Engine Stop Solenoid
W1025506
W1025648
KiSC issued 08, 2019 A