Engine Maintenance
77
Integral Fuel Solenoid
The fuel solenoid is located on the end of the fuel
injection pump.
Operation of the engine is controlled by the
operation of the fuel solenoid and the throttle
(high speed) solenoid. The fuel solenoid consists
of a spring loaded plunger and electro-magnetic
coil. When the engine is Off, spring tension on the
plunger maintains the plunger’s “out” position.
When pushed out, this causes the governor
linkage to move the injection pump rack to the
“Fuel Off” position.
When the fuel solenoid is energized, current is
applied to the coil creating an electro-magnetic
field, which pulls the plunger in. When in the
“pulled-in” position, the plunger releases tension
on the governor linkage. The governor linkage
then moves the fuel injector rack, thus controlling
the fuel flow and placing it in the “Fuel On”
position.
Adjustments made to the throttle (high) speed
solenoid change governor spring tension which in
turn adjust speed settings.
Fuel Solenoid Diagnostic and
Replacement
See the Interface Board diagnostic procedures in
the ThermoGuard
µ
P-T Microprocessor
Controller Diagnosis Manual.
1.
Throttle Lever
6.
Eye Bolt
2.
Fuel Solenoid
7.
Boot
3.
Low Speed Adjustment Screw
8.
Throttle Solenoid
4.
Rod
9.
Ball Joint
5.
Clip
Figure 44: Integral Fuel Solenoid Components
Summary of Contents for 919180
Page 4: ...4...
Page 10: ...Table of Contents 10...
Page 32: ...Unit Description 32 Unit Photographs Figure 3 Front View Figure 4 Back View AJA584 AJA585...
Page 33: ...Unit Description 33 Figure 5 Left Side View Figure 6 Right Side View AJA586 AJA58...
Page 35: ...Unit Description 35 Figure 8 North American Power Receptacle Box AJA58...
Page 38: ...Unit Description 38...
Page 58: ...Electrical Maintenance 58...
Page 66: ...Engine Maintenance 66 Figure 37 Fuel and Oil System Components...
Page 84: ...Engine Maintenance 84...
Page 96: ...Refrigeration Maintenance 96...
Page 118: ...Hilliard Clutch Maintenance 118...
Page 136: ...Cycle Diagrams 136...
Page 140: ...Wiring and Schematic Diagrams Index 140...
Page 141: ...141 Truck S Model SR 30 Schematic Diagram Page 1 of 2...
Page 142: ...142 Truck S Model SR 30 Schematic Diagram Page 2 of 2...
Page 143: ...143 Truck S Model 30 Units with P T Wiring Diagram Page 1 of 2...
Page 144: ...144 Truck S Model 30 Units with P T Wiring Diagram Page 2 of 2...
Page 145: ...145 Truck S Model 50 Schematic Diagram Page 1 of 2...
Page 146: ...146 Truck S Model 50 Schematic Diagram Page 2 of 2...
Page 147: ...147 Truck S Model 50 Units with P T Wiring Diagram Page 1 of 2...
Page 148: ...148 Truck S Model 50 Units with P T Wiring Diagram Page 2 of 2...