Motor Shaft
Cutting Blade
Locking Plate
Blade Bolt
Figure 13
Installing the Blade
WARNING: The blade hardware is not only used to attach the blade assembly, but is also an insulated safety device and should never be altered in any way. If replacement is necessary, use original equipment parts as shown in the parts list on page 17.
•Place the cutting blade, locking plate, and blade bolt against the blade hub assembly and thread the blade bolt on finger tight. Refer to Figure 13.
NOTE: Make certain to replace the parts in the exact order in which they were removed. When installing the cutting blade, make sure it is installed with the curved ends pointing towards the mower deck and not towards the ground.
•Torque the blade bolt down using a torque wrench to assure the bolt is tightened properly. The recommended torque for the blade bolt is
Sharpening the Blade
To sharpen the blade, first remove the blade as outlined in the previous section. DO NOT attempt to sharpen the blade while it is attached to the mower. The blade can be sharpened with a file or on a grinding wheel.
•When sharpening the blade, follow the original angle of grind as a guide. It is extremely important that each cutting edge receives an equal amount of grinding to prevent an unbalanced blade.
•Test the blade by balancing it on a round shaft screwdriver or a blade balancer. See Figure 14.
•If the blade is not balanced, remove metal from the heavy side until it balances evenly.
WARNING: An unbalanced blade will cause excessive vibration when rotating at high speeds. It may also cause damage to the mower and could break, causing personal injury.
•Reinstall the blade as described earlier in this section making certain to torque the cutting blade to specifications.
1. Insert screwdriver through hole | |
2. Balanced blade will be parallel to ground | |
Screwdriver | Blade |
| Ground |
Figure 14
Mower Deck
WARNING: To reduce the risk of electric shock, do not expose the mower to water.
The underside of mower deck should be cleaned after each use as grass clippings, leaves, dirt and other debris will accumulate. This accumulation of grass clippings, etc., is undesirable as it will promote rust and corrosion.
•Remove any buildup of grass and leaves on or around the motor cover (do not use water). Wipe the mower clean with a dry cloth occasionally.
•If debris is allowed to build up on the underside of the unit, stop the motor and disconnect the power supply to the mower, tilt the mower forward or on its side and scrape it clean with a suitable tool.
Lubrication
At the beginning and end of each mowing season:
•Lubricate the springs on the rear discharge door with a light oil.
•Lubricate the height adjustment levers and related hardware with light oil.
•Remove the wheels and lubricate the surface of the axle bolt and the inner surface of the wheel with light oil.
•Remove the blade and blade hub assembly and lubricate the motor shaft with light oil or engine oil. Refer to Figure 13.
13