Toro Workman GTX Service Manual page 35

Fuel Pumps (Fig. 14)
A pulse style fuel pump is used with both the carbureted
and the fuel injected engines to lift fuel from the fuel tank.
Pumping action within the pulse pump is created by al-
ternating positive and negative pressures within the
crankcase through a pulse line. Check valves inside the
pulse pump prevent fuel from going backward through
the pump.
The pulse pump is not serviceable and difficult to test ac-
curately. If the pulse pump performance is suspect, en-
sure the entire pulse line between the pump and the
engine crankcase is not damaged or obstructed. Re-
place the pump as necessary.
Machines with fuel injected engines incorporate an elec-
tric fuel pump in addition to the pulse pump. The electric
fuel pump module receives fuel from the pulse pump,
then increases and regulates the fuel pressure for the
fuel injector. The engine ECU activates the fuel pump for
about 6 seconds to prime the system when the key
switch is turned to the run position. Once the engine is
running, the fuel pump remains energized.
The electric fuel pump performance can be tested, but
the pump assembly is not serviceable; refer to Chapter
5 - Electrical System in this manual. Because the elec-
tric fuel pump is not serviceable, fuel injected engines
are equipped with a special 10- micron fuel filter up-
stream of the electric fuel pump to prevent harmful con-
tamination from entering the electric fuel pump
assembly.
Fuel Tank Removal (Fig. 14)
NOTE: If fuel evaporative control system components
require service, see Fuel Evaporative Control System
Service in this section of this chapter.
1. Park machine on a level surface, stop the engine, en-
gage parking brake and remove the key from the key
switch.
2. Remove seat base assembly with attached seats
from vehicle.
3. Use fuel transfer pump to remove gas from fuel tank.
IMPORTANT: Follow all local codes and regulations
when recycling or disposing waste fuel.
4. Record routing of fuel hoses for installation purpos-
es.
5. Loosen hose clamp and carefully disconnect fuel
supply hose from the fuel tank stand pipe.
6. Carefully disconnect vent hose from rollover valve.
Workman GTX Gasoline
6
1. Fuel tank
2. Stand pipe
3. Bushing
7. Remove washer head screw that secures fuel tank
to tank mount. Slide tank from under fuel tank bracket
and then lift tank from frame.
8. If necessary, remove stand pipe, rollover valve,
bushing and grommet from tank (Fig. 15).
Fuel Tank Installation (Fig. 14)
1. If removed, install bushing, grommet, stand pipe and
rollover valve to tank (Fig. 15).
2. Position fuel tank to vehicle. Slide tank under fuel
tank bracket and then secure tank to tank mount with
washer head screw.
3. Connect fuel supply hose to the fuel tank stand pipe
and secure with hose clamp.
4. Connect vent hose to rollover valve.
5. Install seat base assembly with attached seats to ve-
hicle.
6. Add fresh fuel to tank and check for any fuel leaks.
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2
4
3
1
5
Figure 15
4. Rollover valve
5. Grommet
6. Cap with gauge
Gasoline Engine