Thermo King T-1080S, Maintenance Manual

Page: 109 / 191

Engine Maintenance
108
5. Install the injection pump timing cover on the
gear case cover, and reinstall all components
removed previously to facilitate the injection
pump removal.
Figure 191: Injection Pump Removal and Installation
Fuel Limit Screw
The fuel limit screw is not adjustable. It is
equipped with an anti-tamper cap to fulfill
requirements for CARB (California Air Resources
Board) emission regulations. Service technicians
must be CARB certified to perform service on the
fuel limit screw for equipment operating in
California.
Figure 192: Emission Control Label
Fuel Solenoid
The fuel solenoid is located on the end of the
injection pump. It contains two coils: the pull-in
coil, and the hold-in coil. The pull-in coil draws
approximately 35 to 45 amps at 12 volts. The
hold-in coil draws approximately 0.5 amps at
12 volts.
The pull-in coil must be momentarily energized to
move the fuel rack to the on position. Once the
fuel rack has been moved to the on position, the
hold-in coil will then hold the fuel rack in the on
position until the 8D circuit is de-energized. The
pull-in coil must be de-energized after a few
seconds to keep it from being damaged. The
pull-in coil is controlled by the microprocessor
through the fuel solenoid pull in relay (K6).
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8
1. Injection Pump 5. Injection Pump Gear Mounting Nut
2. Gear Case 6. Lock Washer
3. Gear Case Cover 7. Injection Pump Gear
4. Injection Pump Timing Cover 8. O-Ring