GB - 19
MOWER BLADES
Remove
1. Turn the engine off. Remove the ignition
key. Remove the ignition wire from the
spark plugs.
2. Block mower blades to prevent rotation.
3. Remove the bolts, washers, and blades
from the spindle shafts.
Replace
1. Replace the blades, washers and bolts
on the spindle shafts.
2. Tighten the bolts to a torque of
115-160 lbf-ft (156–217 N•m).
3. Replace the ignition wire on the spark
plugs.
Sharpen the Mower Blades
1. Remove mower blade from unit.
Discard mower blade if:
•
More than 1/2 in. (1.27 cm) of metal is
removed.
•
Air lifts become eroded.
•
Blade is bent or broken.
2. Sharpen mower blade by removing an
equal amount of material from each end
of mower blade. DO NOT change angle
of cutting edge or round the corner of the
mower blade.
3. Check mower blade balance.
Slide mower blade on an unthreaded
bolt. A balanced blade should remain in
a horizontal position. If either end of
mower blade moves downward, sharpen
the heavy end until blade is balanced.
4. Install mower blade(s) on unit.
5. Tighten the bolts to a torque of
115-160 lbf-ft (156-217 N•m).
CAUTION: Use sturdy gloves or
padding to protect hands when
working with mower blades.
Figure 7
CAUTION: DO NOT sharpen
mower blades while on unit. An
unbalanced mower blade will
cause excessive vibration and
eventual damage to unit. Check
mower blade balance before
reinstalling blades.
NEVER weld or straighten bent
blades.
Summary of Contents for Promaster 144
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