Air Cooling System; Inspecting Blades - Jacobsen Standing Zero Turn Rotary Mower ZT90023 Safety, Operation & Maintenance Manual

9 MAINTENANCE

9.12 AIR COOLING SYSTEM ____________________________________________________

The engine on the mower is an air-cooled engine. Dirt and other objects can decrease the air flow and cause the
engine to overheat, cause bad performance and decreased engine life.
Do not use water to clean the engine. Water can cause contamination in the fuel system. Use a brush or clean cloth
to clean the engine.
Use a brush or a dry cloth to clean the air intake area.
Keep throttle linkage, springs and controls clean.
Use compressed air to remove debris from the engine oil cooler fins.
Refer to the Engine manual for additional information.

9.13 INSPECTING BLADES _____________________________________________________

Every 50 hours of operation or when the cutting unit is removed
from the mower, carefully inspect the blades to make sure the
blades are in good condition. Replace any blade that has
bends, grooves or cracks.
!
Be careful when you check blades to prevent pinching
hands and fingers between ends of the blades.
!
Never try to correct or repair a damaged blade. Always
replaced a damaged blade.
The bends, grooves or cracks can cause a piece of the blade
to become loose and be discharged from the mower. The
broken blade pieces can cause injury to persons or property
damage.
A bent blade can have a small crack that can increase and cause a piece of the blade to break. The bent blades can
cause vibration and other stress on the mower.
The dust or sand particles can wear a dangerous groove in the blade between the air vanes and the flat part of the
blade. The groove can quickly increase in size and allow a piece of the blade to break.
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CAUTION
WARNING
NOTICE
Normal
Blade
Bent
Blade
Grooved
Blade
Cracked
Blade