Walker MS - Checking and Servicing

Maintenance Instructions CLEANING
53
Engine Cooling System
Cooling Air Intake System
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 airow. If there is little or no airow, clean
the cooling ns as follows:
DANGER
Make sure to keep hands clear of exhaust
pipe, mufer, and moving parts when
checking airow.
NOTE: The planned maintenance schedule calls
for cleaning the cylinder head cooling ns yearly or
every 300 hours as a minimum.
Check for Airow
Cooling System Airow
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 spark plug wire. Remove the cyl-
inder head shroud by removing the one (1) bolt,
as shown in the Inspect and Clean Cylinder
Head Cooling Fins photo. Cover the spark
plug boot before cleaning out the cooling ns.
Clean the cooling ns by blowing with com-
pressed air. If the buildup is excessive, use a
piece of wire to probe into the ns for cleaning.
3. Reinstall the shrouds by reversing the preced-
ing steps. Start the engine and conrm the
cooling airow.
Cylinder Head Shroud
Bolt (Not Visible)
Spark Plug
Wire
Cooling
Fins
Inspect and Clean Cylinder Head Cooling Fins
(Viewed from Left Side of Tractor)