Toro 25500 Operator's Manual page 50

3. Install a new breather into the pipe coupling hand tight
(Figure 72).
4. Install the right side panel; refer to
Panels (page 45).
Replacing the Fuel Filters
Service Interval: Every 500 hours
The engine on this machine uses a dual fuel-filter system, with
a primary fuel filter and a secondary fuel filter. The primary
fuel filter includes a fuel-water separator; it is not pressurized
but operates under a vacuum. The secondary fuel filter is for
filtration only and is pressurized by the fuel pump.
Removing the Primary and Secondary Fuel Filters
Important: Clean all around the filter area before
disassembling the fuel filter system. Dirt or
contaminants can damage the fuel system.
1. Rotate the battery disconnect switch to the Off
position; refer to Battery-Disconnect Switch (page
2. Remove the right side panel; refer to
Engine (page 44).
3. Clean the area around the primary and secondary fuel
filters.
4. Disconnect the wiring harness from the water-in-fuel
sensor.
Note: The water-in-fuel sensor is located at the
bottom of the fuel/water separator, next to the drain
valve.
5. Place a small-drain container under the drain valve of
the fuel water separator ; refer to
the Fuel-Water Separator (page
Note: The primary fuel filter is a component of the
fuel/water separator.
6. Open the drain valve and allow the fuel-water separator
to drain completely; refer to
Fuel-Water Separator (page
7. Loosen and remove the primary fuel filter
Note: If necessary, use a filter wrench to loosen the
fuel filter.
Installing the Side
20).
Accessing the
Draining Water from
23).
Draining Water from the
23).
(Figure 73).
1. Filter adapter (primary fuel
filter)
8. Place a small-drain container under the secondary fuel
filter.
9. Loosen and remove the secondary fuel filter
74).
Note: If necessary, use a filter wrench to loosen the
fuel filter.
Note: Ensure that the O-ring does not stick to the
fuel filter head. Remove the O-ring with an O-ring
pick, if necessary.
1. Secondary fuel filter
Installing the Primary- and Secondary-Fuel Filters
Important: Do not pre-fill the pressure-side fuel filter
with fuel unless you use a clean side block-off plug.
Pre-filling the pressure-side fuel filter without the use of
50
Figure 73
2. Primary-fuel filter
(fuel/water separator)
Figure 74
2. Filter adapter (secondary
fuel filter)
(Figure