Fuel Pump (Groundsmaster 3320) - Toro Groundsmaster 3280-D Service Manual

Fuel Pump (Groundsmaster 3320)

The fuel pump used on the Groundsmaster 3320 (gaso-
line engine) is attached to the support bracket inside the
right side frame near the fuel filter (Fig. 36).
IMPORTANT: When testing fuel pump, make sure
that pump is not operated without fuel.
Because gasoline 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 deck
(or implement), stop engine and engage parking brake.
2. Disconnect fuel pump discharge hose from the car-
buretor inlet (Fig. 36).
3. Make sure fuel hoses attached to the fuel pump are
free of obstructions.
4. Place disconnected pump discharge hose into a
large, graduated cylinder sufficient enough to collect 1
quart (.95 liter).
IMPORTANT: When testing the fuel pump, DO NOT
turn ignition switch to START.
5. Collect fuel in the graduated cylinder by turning igni-
tion switch ON. Allow pump to run for 30 seconds, then
release ignition switch to OFF.
6. The amount of fuel collected in the graduated cylin-
der should be approximately 13.5 fl oz (400 ml) after 30
seconds.
7. Replace fuel pump if necessary. Install fuel hose to
carburetor inlet.
Electrical System
DANGER
2
1
1. Fuel hose (from tank)
2. Fuel filter
3. Fuel hose
Fuel Pump Specifications
Pump Capacity
Pressure
Rev. A
Page 6 − 26
5
4
3
Figure 36
4. Fuel pump
5. Fuel hose (to engine)
27 fl oz/min
(800 ml/min)
2.8 − 4.3 psi
(19.6 − 29.4 kPa)
Groundsmaster 3280−D/3320