Engine Maintenance; Servicing The Air Cleaner; Changing The Engine Oil - Toro 22291 Operator's Manual

Engine Maintenance

Servicing the Air Cleaner

Service Interval: Every 25 hours—Clean the foam
pre-cleaner (more frequently in dusty
conditions).
Every 300 hours—Replace the paper air filter (more
frequently in dusty conditions).
Important: Do not operate the engine without the
air filter assembly in place; otherwise, extreme engine
damage will occur.
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug.
3. Loosen the screw on the air-cleaner cover (Figure 17).
Figure 17
1. Air-cleaner cover
2. Paper air filter
4. Remove the cover and clean it thoroughly.
5. Remove and inspect the paper air filter (Figure 17), and
replace it if it is excessively dirty.
Important: Do not try to clean a paper filter.
6. Remove the foam pre-cleaner (Figure 17) and wash it
with a mild detergent and water, then blot it dry.
3. Foam pre-cleaner
7. Install the foam pre-cleaner.
8. Install the paper air filter.
9. Install the cover and secure it with the screw.

Changing the Engine Oil

Service Interval: After the first 8 hours
Every 50 hours
1. Run the engine to warm the engine oil.
Note: Warm oil flows better and carries more
contaminants.
WARNING
Oil may be hot after engine has been run, and
contact with hot oil can cause severe personal
injury.
Avoid contacting the hot engine oil when you
drain it.
2. Stop the engine and wait for all moving parts to stop.
3. Disconnect the wire from the spark plug.
4. Drain the gasoline from the fuel tank.
5. Place a suitable drain pan under the dipstick/oil drain.
6. Clean around the dipstick.
7. Remove the dipstick by rotating the cap
counterclockwise and pulling it out.
8. Tip the machine onto its right side (air filter up) to
drain the oil into the drain pan.
9. After draining the oil, return the machine to the
operating position.
10. Fill the crankcase to the Full mark on the dipstick with
fresh oil; refer to 3 Filling the Crankcase with Oil (page
10).
11. Insert the dipstick into the filler neck and rotate the cap
clockwise until it is tight.
12. Wipe up any spilled oil.
13. Recycle the used oil according to local codes.
18