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Cooling System
Maintenance
Cooling System Safety
CAUTION
Discharge of hot, pressurized coolant or touching a
hot radiator and surrounding parts can cause severe
burns.
• Do not remove the radiator cap when the engine
is hot. Always allow the engine to cool at least 15
minutes or until the radiator cap is cool enough
to touch without burning your hand before
removing the radiator cap.
• Do not touch the radiator and surrounding parts
that are hot.
DANGER
Swallowing engine coolant can cause poisoning.
• Do not swallow engine coolant.
• Keep out of reach from children and pets.
Checking the Cooling System
Service Interval: Before each use or daily
The cooling system is filled with a 50/50 solution of water
and permanent ethylene-glycol antifreeze. Check the level of
the coolant in the expansion tank at the beginning of each day
before starting the engine. The capacity of the cooling system
is 7.5 L (6 US qt).
1. Check the level of the coolant in the expansion tank
(Figure
34). The coolant level should be between the
marks on the side of the tank.
2. If the coolant level is low, remove the expansion-tank
cap and replenish the system. Do not overfill the
cooling system.
3. Install the cap of the expansion tank.
1. Expansion tank
Cleaning the Radiator
Service Interval: Before each use or daily
To prevent the engine from overheating, keep the radiator
clean. Normally, check the radiator daily and, if necessary,
clean any debris off these parts. Check and clean the radiator
frequently in extremely dusty and dirty conditions.
Note: If the mower deck or engine shuts off due to
overheating, first check the radiator for excessive buildup of
debris.
Clean the radiator as follows:
1. Open the hood and secure the prop rod.
2. Loosen the flange nut securing the clean-out cover to
the underside of the rear frame
cover to the side to expose the clean-out hole in the
frame.
1. Clean-out cover
3. Working from the fan side of the radiator, blow out
debris with low-pressure (345 kPa [50 psi]) compressed
37
Figure 34
(Figure
35). Rotate the
Figure 35
G014515
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