Electric Fuel Pump (Fuel Injected Engines − Efi) - Toro Workman GTX Service Manual

Electric Fuel Pump (fuel injected engines − EFI)
An electric fuel pump assembly is used on Workman
GTX machines with a fuel injected gasoline engine. The
fuel pump assembly provides pressurized fuel to the fuel
injector in a return−less system and includes a regulator
to maintain fuel pressure of approximately 40 PSI (276
kPa). The fuel pump is rated for a minimum output of 7.6
oz. (224 ml) per minute. To protect the fuel pump, a spe-
cial 10−micron fuel filter is included upstream of the
electric fuel pump. The electric fuel pump assembly and
fuel filter are located under the seats (Fig. 16).
The fuel pump assembly is energized by the engine
ECU. The fuel pump electrical circuit is protected by the
main power fuse (15 Amp). When the ignition switch is
turned to RUN, the engine ECU energizes the fuel pump
for approximately six (6) seconds which allows the fuel
system to be pressurized. Once the engine is running,
the fuel pump is always energized.
Testing
1. Park machine on a level surface, stop engine and en-
gage parking brake.
2. Raise cargo bed and support with prop rod. Remove
rear frame panel cover.
3. Raise or remove the seat base.
The fuel supply hose may contain pressurized
fuel. Cover the connection with a rag to prevent
fuel spray when disconnecting the fuel supply
hose. Always wipe up any spilled fuel before
starting the engine.
4. Disconnect the fuel supply hose from the engine fuel
injector.
A. Lift supply hose fitting lock up to unlock fitting
(Fig. 17).
B. Press barb fitting tab and pull fitting from fuel in-
jector.
5. Install a fuel pressure gauge capable of measuring
50 PSI (350 kPa) to the disconnected hose.
Note: If may be necessary to bypass the pulse pump
and provide a temporary fuel supply to the electric pump
for testing.
Electrical System
CAUTION
1
2
G248268
1. Electric fuel pump
2. Fuel filter
1. Supply hose fitting lock
(locked − down)
Page 5 − 14
3
Figure 16
3. Fuel supply hose
3 2
UNLOCKED
3
1 LOCKED
Figure 17
2. Supply hose fitting lock
(unlocked − up)
3. Supply hose fitting tab
Workman GTX Gasoline