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GB - 21
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.
See Figure 21.
4. Install mower blade on unit. See Install
Mower Blade on page 20.
5. Tighten mounting bolt to a torque of 187
– 253 lb-ft (254 – 343 N•m).
CHECK FASTENERS
Check all fasteners for proper tightness. Pay
special attention to blade hardware and all
guards, shields and safety devices.
CHECK DRIVE BELTS
Check tension of mower blade and wheel
drive belts. See BELT TENSION
ADJUSTMENT on page 27. Check drive belts
for wear and/or damage and replace as
necessary. See BELT REPLACEMENT on
page 30.
GENERAL LUBRICATION
Lubricate wheel drive shaft through grease
fitting every to 16 hours of operation. Lightly
oil all other moving parts every 25 hours of
operation. Wipe off excess oil to avoid
accumulation of dirt and debris.
CLEAN AIR FILTER
Clean air filter every 50 hours of operation.
See engine manual for specific information.
See Figure 22 for air filter location.
CHANGE ENGINE OIL
Change engine crankcase oil after first five
(5) hours of operation. Then change oil after
every 50 hours of operation or annually.
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.
NOTE: Refer to Engine Manual for
instructions and proper oil type.
Figure 20
1. Square Corner
2. Cutting Edge
3. Air Lift
4. Air Lift Erosion
Sharpen to this pattern
.
DO NOT sharpen to this pattern
.
2
1
3
2
3
4
OT0792
DISCARD If More Than 1/2 in. (1.27 cm)
Figure 21
OA0013
Bolt
Blade
Figure 22
Air Filter Cover Knob
Muffler