Bleeding The Fuel System; Diagnostic Light - Toro 30581 Groundsmaster 580-D Operator's Manual

Bleeding the Fuel System

1. Unlatch, raise and prop engine hood open and remove
left side panel (Fig. 23).
Figure 23
1. Engine hood
2. Left side panel
2. At lower left side of engine, loosen air bleed screw at
top of fuel filter/water separator (Fig. 24).
Figure 24
1. Fuel filter/water separator
Note: If fuel tank is over half full, gravity will fill the fuel
filter. If tank is less than half full, fill tank.
3. Loosen air vent plug on engine fuel filter assembly
about 1-1/2 turns (Fig. 25).
4. Rotate priming pump (Fig. 226) counterclockwise until
spring in pump assembly releases. Operate pump up and
down until a solid stream of fuel flows out around filter
plug and tighten plug.
3. Hood latches
4. Side panel latch
25
1
Figure 25
1. Fuel filter air bleed plug
5. Loosen air vent plug on injection pump about 1-1/2
turns (Fig. 26). Operate priming pump until solid stream
of fuel flows from the vent hole (Fig. 26), then tighten
air vent plug.
6. Push priming pump down to compress spring and rotate
clockwise to lock closed.
7. Try to start engine. If engine starts, install left side
panel, lower hood and resume operation. If engine does
not start, repeat steps 2–7.
2
Figure 26
1. Priming pump

Diagnostic Light

The machine is equipped with a diagnostic light which
indicates if the electronic controller is functioning correctly.
The green diagnostic light is located under the control
panel (Fig. 27). 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.
1
2. Injection pump air bleed
plug