Toro 22291, Руководство оператора, Страница: 20 / 28

Servicing the Spark Plug
Service Interval: Every 100 hours—Inspect, clean,
and adjust the spark plug gap;
replace the spark plug if necessary.
Use an NGK BPR5ES spark plug or equivalent.
1. Shut off the engine and wait for all moving parts
to stop.
2. Disconnect the wire from the spark plug.
3. Clean around the spark plug.
4. Remove the spark plug from the cylinder head.
Important:
Replace a cracked, fouled, or
dirty spark plug. Do not clean the electrodes
because grit entering the cylinder can
damage the engine.
5. Set the gap on the plug to 0.76 mm (0.030 inch);
refer to
Figure 22 .
g000533
Figure 22
1. Center-electrode insulator
2. Side electrode
3. Air gap (not to scale)
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.
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 13) .
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 23 ) clockwise 1 turn and repeat
steps 4 through 6 .
g024465
Figure 23
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 23 ) 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.
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