Toro 41568 Operator's Manual page 35

3. If the belt is worn or damaged, remove it and replace it
with a new belt.
Note: To replace the governor/cooling fan belt, you will
need to remove the alternator belt; refer to
adjusting/Replacing the Alternator Belt, page 34.
4. Pull the governor up until you achieve the desired
tension.
5. Hold the governor in place and tighten the mounting
bolts.
Changing the Spark Plugs
Change the spark plugs after every 400 operating hours.
Make sure the air gap between the center and side
electrodes is correct before installing the spark plugs. Use a
spark plug wrench for removing and installing the spark
plugs and a gapping tool/feeler gauge to check and adjust
the air gap.
Type: Motorcraft-AGSF 22C or AGRF22
Air Gap: 0.040 inch (1 mm)
Removing the Spark Plugs
1. Set the parking brake, stop the pump, stop the engine,
and remove the ignition key.
2. Lift the driver seat.
3. Grasp the molded wire boot of a spark plug wire, twist
it, and pull it from the spark plug; repeat for the other
spark plug wires (Fig. 50).
Important Do not grab the wires and pull. Only
remove the wires by grasping the molded boots.
1
1
Figure 50
1. Spark plug wire
4. Clean around the spark plugs to prevent dirt from
falling into the engine and potentially causing damage.
5. Remove the spark plugs and metal washers.
Checking the Spark Plugs
1. Look at the center of the spark plugs (Fig. 51).
If you see a light brown or gray coating on the insulator,
the engine is operating properly. A black coating on the
insulator usually means the air cleaner is dirty.
Important
Do not clean the spark plugs. Always
replace a spark plug when it has a black coating, worn
electrodes, an oily film, or cracks.
2
1. Center electrode insulator
2. Side electrode
2. Check the gap between the center and side electrodes
(Fig. 51) and bend the side electrode, if the gap is not
correct.
Installing the Spark Plug
1. Install the spark plugs and metal washers.
2. Tighten the spark plugs to 18 to 22 ft-lb (24.4 to
29.8 N m).
3. Push the wires onto the spark plugs (Fig. 50).
4. Lower the seat.
1
35
3
1
0.040 inch
Figure 51
3. Air gap (not to scale)
s
(1 mm)
m–3215