Maintenance Instructions CLEANING
69
Engine Cooling System
Radiator Screen and Cooling Fins
To prevent the engine from overheating and possi-
ble engine damage, clean grass clippings, chaff,
and dirt from the ne mesh radiator intake screen
daily. In certain mowing conditions (dry grass,
leaves, tree “cotton”, etc.), it may be necessary to
check and clean the screen several times during use
to prevent engine overheating.
1. Remove the screen. To clean the screen, wash
with soapy water or blow out with compressed
air.
Removable Radiator Screen
2. Inspect the radiator cooling ns for material
lodged in this area which would restrict cooling
airow. Use pressurized air or water to clean.
DO NOT use any tool, like a screwdriver or
knife, to clean material out of the ns as this
may damage the cooling ns. DO NOT use cold
water on a hot radiator.
NOTE: Directing pressurized air or water from
the fan side of the radiator outward is recom-
mended to dislodge material packed on the out-
side of the cooling ns. DO NOT use cold water
on a hot radiator.
WARNING
Radiator and engine parts can become ex-
tremely hot during operation. Wear gloves
and avoid touching hot parts while clean-
ing the radiator screen and cleaning debris
away from the engine and cooling system.
Flushing Radiator and Changing Coolant
Change engine coolant every year. Drain the cool-
ant from the engine and radiator:
1. Remove the radiator cap.
2. Open the drain cocks on the engine block and
radiator (see the Kohler Owner’s Manual for lo-
cation of the drain cocks). Also, drain the cool-
ant recovery tank.
3. If there is any indication of deposits or scaling
inside the radiator, use a commercial scale re-
mover and ush the cooling system thor-
oughly before adding fresh coolant.
Use a pre-mixed 50/50 solution of antifreeze (ethyl-
ene glycol) and distilled water to rell the cooling
system.
IMPORTANT: The solution of antifreeze and water
must be thoroughly pre-mixed before putting it in the
engine. Adding pure antifreeze into the radiator may
cause damage to the engine from overheating.
IMPORTANT: Maintain proper coolant level in the
radiator and coolant recovery tank. The coolant
level should be maintained between FULL and LOW
marks on the coolant recovery tank. Recheck the
coolant level after the rst time the engine has been
operated after lling the coolant system (it would be
normal to add a little coolant after initial operation).
Grass Buildup in Mower Deck Housing
DANGER
Before raising or removing the mower
deck for cleaning, stop the engine, re move
the ignition key, and disconnect the spark
plug wires.
1. Raise the deck lock lever handle on each side
of the carrier frame and pull out to release car-
rier frame for tilting action.
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