Walker S14 Engine Cooling System, Cooling Air Intake Screen, cause engine damage from overheating

Maintenance Instructions

CLEANING

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 necessary­ 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

fins, 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 fins 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 airflow. If there is little or no airflow, clean the cooling fins as follows:

DANGER

Make sure to keep hands clear of exhaust pipe, muffler, and moving parts when checking airflow.

NOTE: The planned maintenance schedule calls for cleaning the cylinder head cooling fins yearly or every 300 hours as a minimum.

Check for Airflow

Cooling System Airflow

1.Inspect accessible cooling fins 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 fins with compressed air. If the buildup is excessive, use a wire to probe between fins 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 confirm cooling airflow.

Cooling

Fins

Spark Plug

Cylinder Head ShroudWire

Bolts (One Not Visible)

Inspect and Clean Cylinder Head Cooling Fins

(Viewed from Left Front Side of Tractor)

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