ENGINE
673831-Rev A 3-11
3
Thermostat
Removal and Installation
See Figure 3-11.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Allow engine to cool completely.
3. Raise the hood.
4. Drain approximately 0.5 qt (0.5 L) of coolant from
engine cooling system into a clean, safe container.
Figure 3-11
5. Loosen hose clamp (1) and remove hose (2) from
thermostat housing (3).
6. Remove two screws (6).
7. Remove thermostat housing (3), gasket (4), and
thermostat (5).
Installation Notes
• Clean the thermostat gasket surface.
• Use a new gasket during installation.
• Install thermostat by reversing the order of removal.
• Fill radiator with clean water and ethylene glycol
based antifreeze mixed for coldest ambient
temperature.
Fuel Filters
Removal and Installation
See Figure 3-12.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Allow the engine to cool completely before servicing.
Figure 3-12
• Label all hoses before removing to ensure correct
installation.
3. Loosen hose clamps (1) and disconnect hoses (2
and 3) from pre-filter (4).
4. Remove hardware (5) and pre-filter clamp (6).
Remove pre-filter (4).
5. Clean area around fuel filter cartridge (7).
6. Remove fuel filter cartridge (7) from fuel filter base
(8).
Engine coolant is hot and under pressure! Allow
the cooling system to cool completely before
performing service.
Rotate the filler cap 1/2 turn counterclockwise
and allow pressure to vent before removing filler
cap.
Diesel fuel is combustible—handle with care. Use
an approved container with a spout that will fit
inside the fuel filler neck. Avoid using
unapproved containers to transport fuel. Keep all
fuel containers clean and closed when not in use.
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