Servicing The Spark Plug - Toro 4573 Operator's Manual

Checking the Engine Oil Level
Service Interval: Before each use or daily
1. Park the machine on a level surface.
2. Disengage the blades (PTO).
3. Set the parking brake.
4. Stop the engine and wait for all moving parts to stop.
5. Remove the ignition key.
6. Open the hood.
7. Clean around the dipstick (Figure 23) so that dirt
cannot fall into the filler hole and damage the engine.
1. Dipstick
2. Metal end
8. Unscrew the dipstick and wipe the metal end clean
(Figure 23).
9. Screw the dipstick fully onto the filler tube
(Figure 23).
10. Unscrew the dipstick again and look at the metal
end. If the engine oil level is low, slowly pour only
enough oil into the filler tube to raise the level to the
Full mark on the dipstick.
Figure 22
Figure 23
3. Filler tube
4. Drain plug
Important: Do not overfill the crankcase with
engine oil and run the engine; engine damage
may result.
Changing the Engine Oil
Service Interval: After the first 5 hours
Every 50 hours (Change it more
frequently when operating the
machine in dusty or dirty conditions.)
1. Start the engine and let it run for 5 minutes.
Note: This warms the oil so that it drains better.
2. Park the machine so that the drain side is slightly
lower than the other side to ensure that the oil drains
completely.
3. Disengage the blades (PTO).
4. Set the parking brake.
5. Stop the engine and wait for all moving parts to stop.
6. Remove the ignition key.
7. Open the hood.
8. Place a pan below the drain plug.
9. Remove the drain plug to allow the oil to drain
(Figure 23).
10. When the oil has drained completely, insert the drain
plug and tighten it securely.
Note: Recycle the used engine oil properly.
11. Clean around the dipstick and unscrew the cap
(Figure 23).
12. Slowly pour approximately 80% of the engine oil
into the filler tube (Figure 23).
13. Check the engine oil level; refer to steps 9 and 10 of
Checking the Engine Oil Level.

Servicing the Spark Plug

Service Interval: Every 25 hours—Check the spark
plug.
Every 100 hours—Replace the spark
plug.
Use a Champion RC12YC or equivalent spark plug.
Ensure that the air gap between the center and side
electrodes is 0.030 inch (0.76 mm) before installing the
spark plug. Use a spark plug wrench for removing and
installing the spark plug and a gapping tool or feeler
gauge to check and adjust the air gap.
Removing the Spark Plug
1. Disengage the blades (PTO).
2. Set the parking brake.
24