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Figure 67
1. Feeler gauge
•
If the gap is less than 0.25 mm (0.01 inch),
then install the shim.
•
If the gap is sufficient, proceed to the safety
check in step F.
F. Perform the following safety check:
i. Sit on the seat, and start the engine.
ii. Make sure the blades do not engage with
the PTO switch in the off position and
the clutch disengaged.
If the clutch does not disengage, install
the shim.
iii. Engage and disengage the PTO switch 10
consecutive times to ensure that the clutch
is functioning properly.
Checking the Wheel-Lug Nuts
Service Interval: After the first 100 hours—Check the
wheel-lug nuts.
Check and torque the wheel lug nuts to 115-142 N-m (85-105
ft-lb).
Checking the Wheel-Hub Nuts
Service Interval: After the first 100 hours—Check the
wheel-hub nuts.
Every 500 hours—Check the wheel-hub nuts.
Check and torque the wheel hub nuts to 211-260 ft-lb
(286-352 N-m).
Cooling System
Maintenance
Cleaning the Air-Intake Screen
Service Interval: Before each use or daily
Before each use, remove any buildup of grass, dirt, or
other debris from the cylinder and cylinder head cooling
fins, air intake screen on the flywheel end, and the
carburetor-governor levers and linkage. This will help ensure
adequate cooling and correct engine speed, and will reduce
the possibility of overheating or mechanical damage to the
engine.
Cleaning the Cooling System
Service Interval: Every 100 hours—Check and clean the
engine cooling fins and shrouds.
1. Disengage the PTO and set the parking brake.
2. Stop the engine, remove the key, and wait for all moving
parts to stop before leaving the operating position.
3. Remove the air-intake screen and fan housing
68).
4. Clean the debris and grass from the engine parts.
5. Install the air-intake screen, the recoil starter, and the
fan housing
(Figure
1
1. Guard and engine
air-intake screen
2. Fan housing
45
68).
2
3
g017741
Figure 68
3. Engine-oil cooler
(Figure
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