Fuel Pump - Toro Groundsmaster 5900 Series Service Manual

Fuel Pump

Testing
Groundsmaster ® 5900 & 5910
16227SL Rev B
g288595
1. Yanmar ECU
The electric fuel pump is attached to then left frame rail near the Yanmar ECU
(Figure 253).
1. Park machine on a level surface, lower cutting decks and stop engine.
2. Raise the hood and remove side panel from left side of machine to gain
access to fuel pump. Allow engine and exhaust to cool before doing any
disassembly of fuel system components.
3. Make sure fuel hoses attached to the fuel pump are free of obstructions.
4. Disconnect fuel pump discharge hose from the fuel/ water separator.
5. Place disconnected end of pump discharge hose into a large, graduated
cylinder sufficient enough to collect 1 quart (0.95 liter).
When testing fuel pump output, do not turn key switch to the START
position.
6. Collect fuel in the graduated cylinder by turning key switch to the ON position.
Allow pump to run for thirty (30) seconds, then turn switch to OFF.
7. The amount of fuel collected in the graduated cylinder should be
approximately 350 ml (11.8 fl oz) after thirty (30) seconds.
8. Replace fuel pump if output specification is not met.
9. If the fuel pump output specifications are met and a circuit problem still exists,
check the wire harness (see
10. Connect fuel pump discharge hose to fuel water separator and secure with
hose clamp.
11. Add fuel to the tank and prime the fuel system (see
(page 4–18)). Check fuel system for leaks before returning the machine to
service.
Figure 253
2. Fuel pump
IMPORTANT
Appendix A (page
Page 6–111
2
1
A–1)).
Prime the Fuel System
Electrical System: Component Testing