Engine Maintenance
92
Fuel Solenoid Replacement
1. Disconnect the 20 wire from the reset switch
to prevent the reset switch from tripping.
2. Connect the new fuel solenoid wire connector
to the main wire harness.
3. Remove the CYCLE-SENTRY module from
the option board to prevent the Auto Start
system from preheating and cranking the
engine.
4. Place the Diesel/Electric switch in the Diesel
position. Place the CYCLE-SENTRY switch
(if so equipped) in the Cont Run position.
5. Place the On/Off switches in the On position
and press the
ON key to energize the fuel
solenoid.
NOTE: The fuel solenoid must be energized
when it is being installed. If it is not, the plunger
and the linkage may not line up correctly and the
fuel solenoid will not function properly.
6. Place the o-ring in the groove in the end of the
fuel injection pump. Make sure that the o-ring
is positioned correctly during installation to
avoid damage and leaks.
7. Install the new fuel solenoid.
8. Press the
OFF key, replace the
CYCLE-SENTRY module, and reconnect the
20 wire to the reset switch.
Engine Speed Adjustments
When the diesel engine fails to maintain the
correct engine speeds, check the following before
adjusting the speed:
1. Bleed air out of the fuel system. Recheck the
speed.
2. Bleed air out of the nozzles. Recheck the
speed.
3. Check the operation of the electric fuel pump.
Make engine speed adjustments with the engine
fully warmed up.
Low Speed Adjustment
1. Start the unit and let it run until the engine is
warmed up.
2. Set the thermostat to make the engine run in
low speed and check the engine speed. The
engine speed should be 1600 to 1650 RPM.
3. If the engine speed is not correct, loosen the
jam nut on the low speed adjustment screw.
4. Turn the low speed adjustment screw to
change the engine speed. Turn the screw in to
increase the engine speed. Turn the screw out
to decrease the engine speed.
5. Set the engine speed at 1600 to 1650 RPM and
tighten the jam nut.
High Speed Adjustment
1. Start the unit and let it run until the engine is
warmed up.
2. Set the thermostat to make the engine run in
high speed and check the engine speed. The
engine speed should be 2400 to 2450 RPM.
3. If the engine speed is not correct, loosen the
jam nut, remove the clip from the solenoid
rod, and remove the solenoid rod from the eye
bolt.
1. Fuel Solenoid
2. O-ring
3. Groove in Fuel Injection Pump
Figure 46: Fuel Solenoid Components
AEA635
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