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
pages 18/19.
• Make certain the blade hub assembly has bottomed out against the motor shaft.
• Place the cutting blade, locking plate, and blade nut against the blade hub assembly and thread
the blade bolt on finger-tight (see Fig. 8).
• 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 nut down using a torque wrench to ensure that the bolt is tightened properly. The
recommended torque for the blade bolt is 450 - 600 in-lbs. To ensure safe operation of your unit,
all nuts and bolts must be checked periodically for proper tightness.
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 a grinding wheel.
• When sharpening the blade, follow the original grinding angle as a guide. It is extremely important
that each cutting edge receives an equal amount of grinding to prevent unbalancing the blade.
• Test the blade by balancing it on a round shaft screwdriver or a blade balancer.
• 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
nut to specifications.
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 causing 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 build up on the underside of the unit, while using, stop the motor and disconnect the
mower from the power supply. Tilt the mower forward, or on its side, and scrape it clean with an
appropriate tool.
Lubrication
At the beginning and end of each mowing season:
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