Walker H27i - Cylinder Head Cooling Fins

56
Maintenance Instructions CLEANING
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(s), 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, mu󰀪er, and moving parts when
checking airow.
Check Airow
with Hand
Cylinder
Head
Check Cooling System Airow
Every 100 hours, inspect and clean the cooling ns
(more often when operating in extremely dusty, dirty
conditions). Remove the two (2) cooling n access
panels in the engine shroud and clean the cooling
ns and external surfaces using compressed air.
Make sure to reinstall the access panels before op
er ating the engine.
CAUTION
DO NOT use a pressure washer to clean
the cooling system on an air-cooled en-
gine, mud may form under the cooling
shroud on the cylinder head and cooling
fan.
NOTE: If dirt is packed into the cooling ns it may
be necessary to remove the engine shroud in order
to thoroughly clean the cooling ns.
Kohler Engine
Shroud
Rotating Engine Cooling
Air Intake Screen
Engine Cooling
Fin Access Panels
Rotating Engine Cooling Air Intake Screen
and Cooling Fin Access Panels
IMPORTANT: Yearly, it is good maintenance prac
tice to remove the engine cooling shroud and clean
the cylinder head cooling ns thoroughly to prevent
overheating and extend engine life. Make sure cool
ing shroud is reinstalled properly. This procedure
will require removing the engine from the chassis.