Craftsman 247.38520 Operator's Manual page 19

CleaninG DeCk
Clean underside of the mower deck once a season to prevent build-up
of grass clippings or other debris. Follow steps below for this job.
1. Run engine until it stops from lack of fuel. Disconnect spark plug
wire.
2. Tip mower so that it rests on the housing,
down. Refer back to Figure 14. Hold mower firmly.
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Never tip the mower more than 90º in any direction and do not leave
the mower tipped for any length of time. Oil can drain into the upper
part of the engine causing a starting problem.
3. Scrape and clean the underside of the deck with a suitable tool.
Do not spray with water.
IMPORTANT: Do not use a pressure washer or garden hose to clean
your unit. These may cause damage to bearings, or the engine. The
use of water will result in shortened life and reduce serviceability.
4. Put the mower back on its wheels on the ground.
blaDe Care
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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 boot from spark plug. Turn mower on its
side making sure that the air filter and the carburetor are facing
up.
2. Remove the bolt and the blade bell support which hold the blade
and the blade adapter to the engine crankshaft. See Figure 16.
3. Remove blade and adapter from the crankshaft.
4. Remove blade from the adapter for testing balance. Balance the
blade on a round shaft screwdriver to check. Remove metal from
the heavy side until it balances evenly. when sharpening the
blade, follow the original angle of grind. Grind each cutting edge
equally to keep the blade balanced.
SERVICE AND MAINTENANCE
keeping the muffler side
Blade Bell
Support
An unbalanced blade will cause excessive vibration when rotating at
high speeds. It may cause damage to mower and could break causing
personal injury.
5. Lubricate the engine crankshaft and the inner surface of the blade
adapter with light oil. Slide the blade adapter onto the engine
crankshaft. Place the blade on the adapter such that the side of
the blade marked "Bottom" (or with part number) faces the ground
when the mower is in the operating position. Make sure that the
blade is aligned and seated on the blade adapter flanges. See
Figure 16 inset.
6. Place blade bell support on the blade. Align notches on the blade
bell support with small holes in blade.
7. 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.
19
Blade
Adapter
Blade
Bolt
Figure 16
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