Cub Cadet 109 - Manual (Page 11)

11
Blade Care
WARNING: When removing the
cutting blade for sharpening or
replacement, protect your hands
with a pair of heavy gloves or use
a heavy rag to hold the blade.
Periodically inspect the blade adapter for cracks,
especially if you strike a foreign object. Replace when
necessary. Follow the steps below for blade service.
1. Disconnect spark plug wire from spark plug. Turn
mower on its side making sure that the air filter and
the carburetor are up.
2. Remove the bolt and the blade bell support which
hold the blade and the blade adapter to the engine
crankshaft. See Figure 5-2.
3. Remove blade and adapter from the crankshaft.
4. The blade can be sharpened with a file or on a
grinding wheel. Do not attempt to sharpen the blade
while it is still on the mower.
5. When sharpening the blade, follow the original angle
of grind. Grind each cutting edge equally to keep the
blade balanced.
6. Remove blade from the adapter for testing balance.
7. Balance the blade on a round shaft screwdriver to
check. 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 cause damage to mower, and could
break causing personal injury.
8. Lubricate the engine crankshaft and the inner surface
of the blade adapter with light oil. Slide the blade
adapter onto the engine crankshaft.
9. Place the blade on the adapter such that the side
of the blade marked “Bottom” (or with part number)
faces ground when the mower is in the operating
position. Make sure that the blade is aligned and
seated on blade adapter flanges.
10. Place blade bell support on the blade. Align notches
on the blade bell support with small holes in blade.
11. Replace hex bolt and tighten hex bolt to torque: 450
in. lbs. min., 600 in. lbs. max.
To ensure safe operation of your mower, periodically
check the blade bolt for correct torque.
Off-Season Storage
The following steps should be taken to prepare your lawn
mower for storage.
1. Clean and lubricate mower thoroughly as described in
the lubrication instructions.
2. We do not recommend the use of a pressure washer
or garden hose to clean your unit.
3. Refer to engine manual for correct engine
storage instructions.
4. Coat mower’s cutting blade with chassis grease to
prevent rusting.
5. Store mower in a dry, clean area. Do not store next to
corrosive materials, such as fertilizer.
When storing any type of power equipment in a poorly
ventilated or metal storage shed, care should be taken to
rust-proof the equipment. Using a light oil or silicone, coat
the equipment, especially cables and all moving parts of
your lawn mower before storage.
Figure -2

Maintaining
Your Lawn
Mower
WARNING
When removing
the cutting blade
for sharpening or
replacement, protect
your hands with a
pair of heavy gloves
or use a heavy rag to
hold the blade.
An unbalanced blade
will cause excessive
vibration when rotat-
ing at high speeds. It
may cause damage
to mower, and could
break causing per-
sonal injury.