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Maintenance Instructions CLEANING
55
Engine Cooling System
Cooling Air Intake Screen
To prevent engine overheating and possible engine
damage, clean grass clippings, chaff, and dirt from
the rotating engine cooling air intake screen after
every 8 hours of operation. In certain mowing con-
ditions (dry grass, leaves, tree “cotton”, etc.), it may
be nec essary to check and clean this area several
times each day to prevent engine overheating.
CAUTION
Operating the engine with a blocked air
intake screen, dirty or plugged cooling
ns, and/or cooling shrouds removed will
cause engine damage from overheating.
Rotating Engine
Cooling Air
Intake Screen
Keep Rotating Engine Cooling
Air Intake Screen Clean
Cylinder Head Cooling Fins
It is essential for performance and longevity of the
air-cooled engine to keep the cylinder head cooling
ns clean and free of obstruction. After every 8
hours of operation, check the performance of the
cooling system by starting the engine, holding a
hand adjacent to the cylinder head, and feeling the
cooling airow. If there is little or no airow, clean
the cooling ns as follows:
DANGER
Make sure to keep hands clear of exhaust
pipe, mufer, and moving parts when
checking airow.
NOTE: The planned maintenance schedule calls
for cleaning the cylinder head cooling ns yearly or
every 300 hours as a minimum.
Check for Airow
Cooling System Airow
1. Inspect accessible cooling ns and clean with
compressed air as needed. If the buildup is ex-
cessive, refer to step 2.
2. Remove the cylinder head shroud by removing
the two (2) bolts as shown in the Inspect and
Clean Cylinder Head Cooling Fins photo.
Slide the shroud forward to disengage the tabs
at the back of the shroud, and then drop the
shroud down under the cylinder head and re-
move. Clean the cooling ns with compressed
air. If the buildup is excessive, use a wire to
probe between ns and dislodge any debris.
3. Reinstall the shroud by reversing the preceding
step. Make sure that the tabs at the back of the
shroud are correctly inserted underneath the
cylinder head. Start the engine and conrm
cooling airow.
Cooling
Fins
Spark Plug
Wire
Cylinder Head Shroud
Bolts (One Not Visible)
Inspect and Clean Cylinder Head Cooling Fins
(Viewed from Left Front Side of Tractor)