Ariens 911110 - P 21LM - Manual (Page 18)

GB - 18
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
(Figure 15).
4. Install mower blade on unit.
5. Tighten the bolts to a torque of 37.5 -
50 lbf-ft (51-68 N•m).
CHECK DRIVE BELT (self-
propelled models)
Check drive belt and replace if worn or
damaged. See DRIVE BELT
REPLACEMENT (self-propelled models) on
page 20.
CHECK FASTENERS
Check all fasteners for proper tightness. Pay
special attention to blade hardware and all
guards, shields and safety devices.
CHECK AIR CLEANER
See engine manual for specific information.
CHANGE ENGINE OIL
IMPORTANT: Change engine crankcase oil
after first five (5) hours of operation. Then
change oil after every 25 hours of operation.
Refer to engine manual for instructions and
proper oil type.
IMPORTANT: Proper oil level must be
maintained at all times or engine damage will
result. DO NOT overfill. Be sure engine is
level when adding oil.
GENERAL LUBRICATION
NOTE: The mower transmission is lubricated
and sealed at the factory. It should need no
routine lubrication. If the transmission leaks
grease, bring the mower to your local Ariens
dealer for repair.
CAUTION: DO NOT sharpen
mower blades while on unit. An
imbalanced mower blade will
cause excessive vibration and
eventual damage to unit. Check
mower blade balance before
reinstalling blades.
NEVER weld or straighten bent
blades.
Figure 14
1. Square Corner
2. Cutting Edge
3. Air Lift
4. Air Lift Erosion
Sharpen to This Pattern
DO NOT Sharpen to This Pattern
DISCARD If More
Than 1/2 in. (1.27 cm)
2 1
3
2
3
4
OT0792
Figure 15
OA0013
Bolt
Blade