Drive System Maintenance; Adjusting The Self-Propel; Drive; Servicing The Wheels - Toro 22168 Operator's Manual

Drive System
Maintenance

Adjusting the Self-propel

Drive

If the mower does not self-propel or has a
tendency to creep forward when the blade 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 (Figure 26).
Figure 26
1. Control knob
1. Close the door in the mower housing and
remove the grass bag.
2. Rotate the control knob clockwise a half turn if
the mower does not self-propel. If the mower
creeps forward, rotate the knob a half turn
counterclockwise to loosen the belt (Figure 26).
3. Slowly pull the mower backward while you
gradually move the blade control bar toward
the handle.
Note: The adjustment is correct when the
rear wheels stop turning and the blade control
bar is about one inch (2.5 cm) from the handle
(Figure 27).
Figure 27
1. 1 inch (2.5 cm)

Servicing the Wheels

Removing the Wheels
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 28).
Figure 28
1. Locknut
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 28).
Note: If you remove the bearings from
the bearing/hub assembly, remove them by
pressing on the bearing spacer (Figure 28).
Assembling the Wheels
1. Position the tire onto one wheel half, aligning
the lugs on each (Figure 28).
2. Place the bearing/hub assembly into the center
hole of the wheel half.
Note: Ensure that the legs of the hub
are positioned over the flange of the hole
(Figure 28).
3. Place the other wheel half onto the bearing/hub
assembly, aligning the wheel and the tire lugs
and the mounting holes (Figure 28).
4. Using 2 fully threaded bolts (1/4 x 1-1/2
inches) and non-locking nuts, loosely secure
the wheel halves together. Mount the bolts in
the opposing holes (Figure 28).
5. Check the alignment of all parts and tighten
the bolts, alternating from side to side for a
23
6. Plastic cover (rear wheels
only)
7. Lug
8. Bearing (2)
9. Bolt