Fuel System Repairs; Fuel System Repairs; Bleeding The Fuel System - Toro Workman 3000 Series Service Manual

Fuel System Repairs

When cleaning the engine, DO NOT spray water onto a
hot injection pump. This could cause the fuel pump to
seize and be damaged.
When working on the fuel system, ALWAYS make sure
that the equipment and work area is clean. The close

Bleeding the Fuel System

1. With the engine OFF, loosen the air bleed screw on
the fuel filter / water separator (Fig. 39).
2. Turn the ignition key switch to ON position. The
electric fuel pump will begin to operate and force fuel
out around the air bleed screw. Fuel will fill the filter bowl
and then flow out around the screw. When a solid stream
of fuel flows out around the screw, tighten the screw and
turn the key switch OFF.
3. Open the air vent screw on the fuel injection pump
(Fig. 40).
4. Turn the ignition key switch to the ON position. The
electric fuel pump will begin to operate and force fuel
out around the injection pump air vent screw. When a
solid stream of fuel flows out around the screw, tighten
the screw and turn the key switch OFF.
NOTE: Normally the engine should start after this pro­
cedure. If the engine does not start, air may be trapped
between the injection pump and injectors (See Bleeding
Air From the Injectors in this section of the book.)
Liquid Cooled Diesel Engine
tolerance parts of the fuel system can be easily dam ­
aged by dirt.
Wash fuel system parts in clean fresh diesel fuel. If parts
are removed for a period of time, store them in contain ­
ers of clean diesel fuel to prevent corrosion.
1. Fuel injection pump air vent screw
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1
Figure 39
1. Bleed screw
1
Figure 40
Workman 3300-D/4300-D