Service Manual

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Workman GTX GasolinePage 5 − 14Electrical System

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.

CAUTION

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.

1. Electric fuel pump

2. Fuel filter

3. Fuel supply hose

Figure 16

G248268

Figure 17

1. Supply hose fitting lock

(locked − down)

2. Supply hose fitting lock

(unlocked − up)

3. Supply hose fitting tab

LOCKED

UNLOCKED