Drive System Maintenance; Adjusting The Self-Propel Drive - Toro 22293 Operator's Manual

Figure 21
1. Center-electrode insulator
2. Side electrode
6. Carefully install the spark plug by hand (to avoid cross
threading) until it is hand tight.
7. Tighten the spark plug to 23 N-m (2.3 kgf-m, 17 ft-lb).
Important: A loose spark plug can become very
hot and can damage the engine; overtightening a
spark plug may damage the threads in the cylinder
head.
8. Connect the wire to the spark plug.
3. Air gap (not to scale)
Drive System
Maintenance

Adjusting the Self-propel Drive

If the machine is new, does not self-propel, or it tends to
creep forward, adjust the drive cable.
1. Move the machine outside and onto a paved surface
near a solid wall to safely prevent the machine from
moving forward while the engine is running.
2. Position the machine with the front tires against the
wall.
Note: Ensure that the area is well ventilated and clear
of debris that could be thrown by the machine.
3. Shift the transmission to third gear.
4. Start the engine; refer to Starting the Engine (page 11).
5. Pull the self-propel-drive bar to the handle.
Note: The wheels should start to turn as the
self-propel-drive bar just touches the handle.
6. Shut off the engine.
7. If you must adjust the machine, do the following:
•
If the wheels do not spin when you engage the
self-propel-drive bar, the traction belt is too loose.
Rotate the wheel-drive-control knob (Figure 22)
clockwise 1 turn and repeat steps 4 through 6.
1. Wheel-drive-control knob
•
If the wheels spin before you fully engage the
self-propel-drive bar, the traction belt is too tight.
Rotate the wheel-drive-control knob (Figure 22)
counterclockwise 1 turn and repeat steps 4 through
6.
8. For a new traction belt, rotate the drive cable
adjustment knob clockwise 1 additional turn to allow
for the normal stretching of the belt during the break-in
period.
Note: You can skip this step if you are adjusting a
used belt.
19
Figure 22