Drive Control System— Machine Controller

15Drive speed switch on joystick closed (depressed)

16Drive direction switch on joystick in reverse position

17Drive direction switch on joystick in forward position

18NOT USED

19Ignition switch in “ON/START/RUN” position

20Signal sent to auxiliary hydraulics flow solenoid (forward direction) -- (Later serial number machines only)

21Signal sent to auxiliary hydraulics flow solenoid (reverse direction) -- (Later serial number machines only)

22 Signal sent to lift/tilt lock solenoids (lift/tilt activation; all safety requirements met) -- (Later serial number machines only)

23Reverse direction auxiliary hydraulics joystick button closed (depressed) -- (Later serial number machines only)

24Seat switch in closed position (operator in seat) -- (Later serial number machines only)

25Forward direction auxiliary hydraulics joystick button closed (depressed) -- (Later serial number machines only)

26Signal sent to fuel solenoid to maintain fuel flow

Machine Controller Logic

Functions controlled by the machine controller follow specific logic as described in the following table. Numbers in the table refer to the numbered LEDs in the previous table.

NOTE: Not all possible logic function states are shown in the table.

Function“IN” LEDs“OUT” LEDsNotes

(1) -- Ignition switch in "ON" position

(10) -- Signal sent to glow plug relay

Glow Plug

Engine Start

(no LED) Engine temperature is below 50° F (10° C)

(1) -- Ignition switch in "START" position

Later serial number machines: (13, 24) -- (24) Seat switch indicates operator in seat and/or (13) parking brake engaged

Earlier serial number machines: (12, 13, 14) -- (24) ROPS tilt switch indicates operator platform is down and/or (13) parking brake engaged and/or (14) auxiliary hydraulics lever is in forward/reverse position

(1) -- Ignition switch in "START" position

Engine Start

Disabled

(4) -- Signal sent to glow plug indicator on instrument panel

When the ignition switch is in the “ON” position and engine temperature is below 50° F (10° C), glow plug and glow plug indicator are activated for a period of time determined by engine temperature

The engine will start only if:

(6) -- Signal sent to engine starter

(11) -- Signal sent to fuel solenoid for 1.5 seconds to start fuel flow

(26) -- Signal sent to fuel solenoid to maintain fuel flow

Later serial number machines: The operator seat is occupied and/ or the parking brake is on

Early serial number machines: The operator seat platform is down and/or the parking brake is on and/ or the auxiliary hydraulics lever is in neutral (centered) position

(16, 17) -- Joystick drive direction switch is in (17) forward or (16) reverse position

Earlier serial number machines: (14) -- Auxiliary hydraulics lever is in forward/reverse position

NO "OUT" SIGNALS

Engine will not start if the joystick drive direction switch is not in the neutral position

Early serial number machines: Additionally, engine will not start if auxiliary hydraulics lever is not in neutral (centered) position