Figure 22
1. Engine hood
2. Left side panel
3. Glow plug indicator light
4. Side panel latch
2. At the lower left side of the engine, loosen the air
bleed screw at the top of the fuel filter/water
separator (Fig. 23).
Figure 23
1. Fuel filter/water separator
Note: If the fuel tank is over half full, gravity will
fill the fuel filter. If the tank is less than half full, fill
it.
3. Loosen the air vent plug on the engine fuel filter
assembly about 1-1/2 turns (Fig. 24).
4. Rotate the priming pump (Fig. 25)
counter-clockwise until the spring in the pump
assembly releases. Operate the pump up and down
until a solid stream of fuel flows out around the
filter plug and tighten the plug.
Figure 24
1. Fuel filter air bleed plug
5. Loosen the air vent plug on the injection pump
about 1-1/2 turns (Fig. 25). Operate the priming
pump until a solid stream of fuel flows from the
vent hole (Fig. 25), then tighten the air vent plug.
6. Push the priming pump down to compress the
spring then turn it clockwise to lock it closed.
7. Try to start the engine. If the engine starts, install
the left side panel, lower the hood and resume
operation. If the engine does not start, repeat steps
2–7.
Figure 25
1. Priming pump
2. Injection pump air bleed plug
DIAGNOSTIC LIGHT
The GM 580-D is equipped with a diagnostic light that
indicates whether the electronic controller is functioning
correctly. The light is located under the control panel. When
the electronic controller is functioning correctly and the key
switch is moved to the ON position, the controller
diagnostic light will be illuminated. The light will blink if
the controller detects a malfunction in the electrical system.
The light will stop blinking and automatically reset when
the key switch is turned to the OFF position.
Operation
21
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