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SHARPENING THE BLADE
See Figure 12
For best mowing performance, the mower blade must
be kept sharp. A dull blade does not cut grass evenly
and overloads the motor. Under normal circumstances,
sharpening the blade twice during the mowing season
is usually sufficient. However, if your lawn has sandy
soil, more frequent sharpening's may be required.
•
Following the instructions in the Replacing the
Cutting Blade section, remove the mower blade.
DO NOT attempt to sharpen the blade while it is
attached to the mower.
WARNING:
When removing, inspect the blade carefully. If blade is
bent or damaged, replace immediately with a new
blade. Failure to replace a bent or damaged blade
could cause an accident resulting in possible serious
injury.
•
Using a fine tooth file or stone, sharpen cutting
edges on both ends of the blade, removing equal
amounts of material from both ends.
BALANCING THE BLADE
See Figure 13
When sharpening, care should be taken to keep the
blade balanced. An unbalanced blade will cause
excessive vibration when the mower is running. This
vibration will eventually cause damage to the mower,
especially the motor.
To check blade balance:
•
Clamp a screwdriver horizontally in a vise as
shown.
NOTE: If a vise is not available, a straight nail can also
be used.
•
Place the center hole of blade on the screwdriver
(or nail) shank.
MAINTENANCE
•
REPLACING WHEELS
See Figure 14
To Replace a wheel:
•
•
•
•
•
•
Fig. 12
BATTERY MAINTENANCE
It is recommended to charge the mower every 3
months for optimum performance when not in use. If
the battery has been in storage for a long time without
recharging, it will be in a low charge state.
15
Model 61940S
If blade is balanced, it will remain in a horizontal
position. If either end of the blade drops downward,
sharpen the heavy side until the blade is balanced.
Stop the motor and remove the switch key.
Remove battery from the battery compartment.
Turn the mower on its side.
Using a flat blade screwdriver, pry off the hubcap
(1).
Remove the self-locking nut (2) from the wheel axle
(3), then remove the wheel (4).
Replace with new wheel and install new
self-locking nut (2) securely.
Replace hubcap (1).
1
4
3
Fig. 13
Fig. 14
2
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