Cleaning Under The Belt Cover; Cleaning The Cooling System; Emptying The Fuel Tank; Charging The Battery - Toro 20831 Operator's Manual

Sharpening the Blade
File the top side of the blade to maintain its original cutting
angle (Fig. 31A) and inner cutting edge radius (Fig. 31B).
The blade will remain balanced if you remove the same
amount of material from both cutting edges.
1
153
Figure 31
1. Sharpen at this angle only
Balancing the Blade
1. Check the balance of the blade by placing the center
hole of the blade over a nail or screwdriver shank
clamped horizontally in a vise (Fig. 32).
Figure 32
Note: You can also check the balance using a commercially
manufactured, blade balancer.
2. If either end of the blade rotates downward, file that end
(not the cutting edge or the end near the cutting edge).
The blade is properly balanced when neither end drops.
Installing the Blade
1. Install a sharp, balanced Toro blade, the blade stiffener,
the lock washer, and the blade bolt.
Note: The sail part of the blade must point upward
(toward the top of the housing).
2. Torque the blade bolt to 45 to 60 ft-lb (33 to 44 N m).
3. Turn the lawn mower upright.
4. Connect the wire to the spark plug.

Cleaning Under the Belt Cover

Keep the area under the belt cover free of debris.
1. Stop the engine and wait for all moving parts to stop.
2
m-6336
2. Maintain the original
radius here
1007
20
2. Lift off the cover and brush out all the debris from the
belt area.
3. Install the belt cover.

Cleaning the Cooling System

After every 100 operating hours or every season, clean the
dirt and the chaff from the cylinder, the cylinder head fins,
and around the carburetor and the linkage. Remove debris
from the air intake slots on the recoil housing. This will
ensure proper cooling and the best engine performance.

Emptying the Fuel Tank

1. Stop the engine and wait for it to cool.
Important Drain gasoline from a cold engine only.
2. Disconnect the wire from the spark plug (Fig. 11).
3. Remove the cap from the fuel tank (Fig. 9).
4. Use a hand pump to pump the gasoline into a clean
approved gasoline container.
5. Connect the wire to the spark plug.
6. Run the engine until it stops.
7. Start the engine again to ensure that all the gasoline is
out of the carburetor.

Charging the Battery

Electric-start Model only
Warning
CALIFORNIA
Proposition 65 Warning
Battery posts, terminals, and related accessories
contain lead and lead compounds, chemicals
known to the State of California to cause cancer
and reproductive harm. Wash hands after
handling.
Charge a new or stored battery for 72 continuous hours to
ensure a full charge. The engine comes with an alternator
which charges the battery during operation. You do not
need to charge the battery after each mowing. During the
lawn mowing season, charge the battery for 48 hours every
month or as needed.
Important Do not overcharge the battery.
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire harness from the battery (Fig. 7).