GENSET AND BATTERY PACK
4271491-Second Edition 3-19
3
Thermostat (Diesel Models)
Removal and Installation
See Figures 3-23 and 3-24.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Allow the engine to cool completely.
3. Raise the hood.
4. Drain cooling system, 3 qt (2.8 L). Open petcock
located on bottom of radiator, remove radiator cap,
and drain coolant into a clean container.
Figure 3-23
5. Cut cable tie (3).
6. Loosen hose clamp (4) and remove hose (5).
7. Remove nut (1) and washer (2).
Figure 3-24
8. Remove two screws (7), two lock washers (8), and
bracket (9).
9. Remove thermostat housing (6), gasket, and
thermostat.
Installation Notes
• Install thermostat by reversing the order of removal.
• Clean gasket surface.
• Use a new gasket during installation.
• Use a new cable tie to secure wire harness.
• Fill the radiator with a 50/50 mixture of good quality
ethylene glycol-base antifreeze and clean, fresh
water.
Never remove the radiator cap when the coolant
is hot. The engine must be shut down and cooled
before the radiator cap is removed. Very hot
coolant will be sprayed from the radiator if the
cap is loosened before the engine has cooled.
Serious personal injury can occur.
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