Service Manual User Manual

Section 10
10-38
Model 3606 • Origin 10/99
Figure 10– 26. Vehicles with
serial number 8250 through
9398
use the fuse and relay panel shown here.
4. If the park brake is set, current flows through
contacts in the brake switch to the neutral start
circuit.
5. If the transmission select lever is in NEUTRAL (N),
current flows through the neutral start circuit to
energize the coil of the starter relay. The relay closes
internal contacts that allow current to flow to the
starter solenoid and starter.
6. The starter solenoid engages a gear on the starter
pinion shaft to mesh with the flywheel, and the starter
pinion and gear begin to spin, in turn rotating the
flywheel, crankshaft and related components within
the engine.
7. When the ignition key switch was initially turned, the
fuel run solenoid opened a valve to supply to the fuel
injection pump. As the starter rotated the engine
components, the fuel injection pump and related lines
and injectors supplied fuel to the cylinders.
8. When the pistons compress injected fuel, ignition
occurs, the engine starts and the starter pinion
retracts.
Figure 10– 27. Vehicles with
serial number 9399 and after
use the fuse and relay panel shown here.
9. As the engine runs it operates an alternator that
recharges the battery used during the starting cycle.
10. When the ignition key switch is released after starting
the engine, the key switch returns to a neutral
position where it directs current to the fuse panel that
distributes electrical current for the operation of
vehicle controls, including the joystick, gauges and
other equipment.
PERKINS COLD START OPTION ONLY:
When starting
in a cold environment (when temperatures are at or
below freezing), turning the ignition key switch (Fig. 10–
25) to the PREHEAT position between RUN and START
for a few moments (usually 15-20 seconds, or up to 30
seconds during extreme cold) before starting will supply
current to a thermo-start plug in the intake manifold. The
plug ignites a fuel-air mixture in the intake manifold to
facilitate cold weather starting.
15
30
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5 7.5
7.5
7.5
Vehicles Stamped with S/N 8250
through 9398
Neutral
Relay/Starter
Display
Panel
Logic
Panel
Neutral
Sense
*Switch Lamps
Horn
*Aux.
Detent
Mode
Steer
Solenoids
Stabil-TRAK
Solenoid
Stabilizer Lock Relay
Reverse Relay
Forward Relay
Stabilizer Lock
Relay
Boom Switch
Relay
*Optional
Neutral Relay
Trans. Relay #3
Trans. Relay #2
Trans. Relay #1
OS1770
Transmission
Solenoids
Park Brake
Sense Relay
Trans. Relay
Fuel Shut-Off
Hourmeter
Main
*Cold Start
7.5
15
15
30
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5 7.5
7.5
7.5
30
25
7.5
20
20
7.5
7.5 7.5
Vehicles Stamped with S/N 9399
and After
Neutral
Relay/Starter
*Cold Start
Main
Display
Panel
Fuel
Shut-Off
*Blower Motor
Stabil-TRAK
Solenoid
Park Brake
Sense Relay
Trans.
Solenoids
*Window
Motor
Logic
Panel
*Light Pkg (B)
*Light Pkg
(A)
Neutral
Sense
Hourmeter
*Front
Wiper
*Skylight
Wiper/Washe
*Rear Wiper
Horn
*Switch
Lamps
Trans.
Relay
*Aux.
Detent
Mode
Steer
Solenoids
*Power Window
Motor Relay (40 Amp)
Reverse Relay
Forward Relay
Stabilizer Lock
Relay
Boom Switch
Relay
Stabilizer
Lock Relay
*Power Accessory
Relay (40 Amp)
Neutral Relay
Trans. Relay #3
Trans. Relay #2
Trans. Relay #1
*Optional
OS2190