Fuel Pump - Toro GroundsmasterR 4300-D Service Manual

Fuel Pump

The fuel pump used on the Groundsmaster 4300--D is
attached to the inside of the left side frame rail near the
fuel tank (Fig. 55).
IMPORTANT: When testing fuel pump, make sure
that pump is not operated without fuel.
DANGER
Because diesel fuel is highly flammable, use cau-
tion when handling it. Do not smoke while testing
the fuel pump. Do not test fuel pump while engine
is hot. Make sure that there is adequate ventila-
tion when testing. Always wipe up any spilled
fuel before starting the engine.
Fuel Pump Capacity Test
1. Park machine on a level surface, lower cutting
decks, stop engine and engage parking brake. Remove
key from ignition switch. Raise and support operator
seat and hood.
2. Disconnect wire harness electrical connector from
the engine fuel stop solenoid to prevent the engine from
starting (see Fuel Stop Solenoid in this section).
3. Disconnect fuel hose (pump discharge) from the
fuel/water separator inlet fitting (Fig. 56).
4. Make sure fuel hoses attached to the fuel pump, fuel
filter and fuel tank suction tube screen are free of ob-
structions.
5. Place disconnected fuel hose into a large, graduated
cylinder sufficient enough to collect 1 quart (0.95 liter).
IMPORTANT: When testing the fuel pump, DO NOT
turn ignition switch to START.
6. Collect fuel in the graduated cylinder by turning igni-
tion switch to the RUN position. Allow pump to run for 15
seconds, then turn ignition switch to OFF.
7. Fuel collected in the graduated cylinder should be
approximately 16 fl oz (475 ml) after 15 seconds.
8. Replace fuel pump if necessary.
9. Install fuel hose to the fuel/water separator. Make
sure to secure fuel hose with hose clamp.
Groundsmaster 4300--D
10.Connect wire harness electrical connector to the en-
gine fuel stop solenoid.
11. Bleed the fuel system.
12.Lower and secure operator seat and hood.
Fuel Pump Specifications
Pump Capacity
Pressure
Current Draw
2
1
1. Fuel pump
2. Pump discharge hose
2
1. Fuel/water separator
2. Fuel hose (from pump)
Page 5 - - 43
64 fl oz/min (1.9 l/min)
7 PSI (48.3 kPa)
2.0 amp
3
Figure 55
3. Hydraulic gear pump
3
Figure 56
3. Inlet fitting
Electrical System
1