Drive System Maintenance; Adjusting The Self-Propel Drive; Servicing The Wheels - Toro 22196 Operator's Manual

Drive System
Maintenance

Adjusting the Self-propel Drive

Service Interval: Every 100 hours
If the machine does not self-propel or has a tendency to creep
forward when the control bar is more than 1-1/2 inches (3.8
cm) from the handle, adjust the wheel drive control knob
on the rear of the gear box.
1. Close the door in the machine housing and remove
the grass bag.
2. Rotate the control knob clockwise a half turn if the
machine does not self-propel. If the machine creeps
forward, rotate the knob a half turn counterclockwise
to loosen the belt (Figure 32).
Figure 32
1. Control knob
3. Slowly pull the machine backward while you gradually
move the control bar toward the handle.
Note: The adjustment is correct when the rear wheels
stop turning and the control bar is about one inch (2.5
cm) from the handle (Figure 33).
Figure 33
1. 1 inch (2.5 cm)

Servicing the Wheels

Removing the Wheels
Service Interval: Every 100 hours
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug.
3. Remove the bolt, the wheel spacer, and the locknut
mounting the wheel to the pivot arm (Figure 34).
1. Locknuts
2. Wheel spacer
3. Bearing/hub assembly
4. Bearing spacer
5. Wheel half
4. Separate the wheel halves from the tire by removing 4
bolts and 4 locknuts (Figure 34).
Note: If you remove the bearings from the
bearing/hub assembly, remove them by pressing on the
bearing spacer (Figure 34).
Assembling the Wheels
1. Position the tire onto one wheel half, aligning the lugs
on each (Figure 34).
2. Place the bearing/hub assembly into the center hole
of the wheel half. Ensure that the legs of the hub are
positioned over the flange of the hole (Figure 34).
3. Place the other wheel half onto the bearing/hub
assembly, aligning the wheel and the tire lugs and the
mounting holes (Figure 34).
4. Using 2 fully threaded screws or bolts (1/4-20 x 1.50
inch) and non-locking nuts, loosely secure the wheel
halves together. Mount the screws or bolts in the
opposing holes (Figure 34).
5. Check the alignment of all parts and tighten the bolts,
alternating from side to side for a uniform fit, until the
wheel halves are drawn together (Figure 34).
6. Install the 2 bolts and 2 locknuts previously removed
in the remaining holes in the wheel halves and tighten.
Remove the 2 long screws or bolts and replace them
with 2 bolts and 2 locknuts (Figure 34).
7. Install the wheel to the pivot arm with the bolts,
a spacer, and a locknut. Ensure that the spacer is
positioned between the wheel hub and the pivot arm
(Figure 34).
23
Figure 34
6. Plastic cover (rear wheels
only)
7. Lug
8. Bearing (2)
9. Bolt