Maintenance Instructions

CHECKING/SERVICING

 

 

Intersection

Sharpen at

 

Original 30° Angle

 

Wear Area

 

 

 

 

 

Wing

30°

 

Tip

 

 

 

 

 

Do Not Grind or

Sharpen on Underside

Mower Blade Profile For Sharpening

6.Check blade balance by positioning the blade horizontally on a blade balancer or use a nail or shaft through the center hole. If either end of the blade rotates downward, grind (remove) metal on that end until the blade will balance. The blade is properly balanced when neither end drops. Balance of a blade is generally main- tained by removing an equal amount of material from each end of the blade when sharpening.

Blade Balancer

Blade Balanced on Magnetic

Wall-Mounted Balancer

7.Mount the blade with wing tips pointing up into the housing. Reinstall the blade, washer, lock

washer, and nut. Tighten the nut to 60 ft-lb (81.3 N⋅m).

Drive Belts

Look under the body and inspect the condition of the two (2) belts every 25 hours of operation - engine PTO drive, and ground drive belt. If the belts show signs of cracking or deteriorating, the belts should be replaced. Refer to REPLACING/RE- PAIRING the Drive Belts in this section.

Mower Deck Gearbox Oil Seals

The mower deck gearbox seals and gaskets should be inspected every 25 hours for evidence of oil leaking; particularly the lower oil seal on the blade drive gearbox. This seal is protected by the trash guard on the blade hub and seal protector plate on the housing, but is still vulnerable to seal damage due to operating in an adverse environment. The mower blade must be removed for inspection of the seal, so it is recommended to inspect the gearbox seals when blades are removed for sharpening. If an oil leak is noted, the seal should be replaced and the gearbox assembly relubricated. Refer to Mower Deck Gearbox Lubrication in this section.

Spark Plugs

Every 100 hours, remove the spark plugs, inspect, clean, and reset the gap (or replace with new plugs). Clean spark plugs with a wire brush. If the electrodes are burned short or pitted, replace the plug (refer to Specifications for the proper type of replacement plug). Check the spark plug gap with a wire-type feeler gauge and set the gap to 0.030 in. (0.75 mm). Reinstall and tighten to 16 ft-lb (22 N·m).

Fuel Lines and Clamps

Every year, inspect the fuel supply line from the tank to engine for deterioration or damage. Also, inspect the fuel line clamps for tightness. Good preventive maintenance calls for complete replacement of fuel lines and clamps every two (2) years.

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