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Drive System
Maintenance
Adjusting the Self-propel Drive
Service Interval: Every 100 hours
If the lawn mower 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 lawn mower housing and
remove the grass bag.
2. Rotate the control knob clockwise a half turn if
the lawn mower does not self-propel. If the lawn
mower creeps forward, rotate the knob a half turn
counterclockwise to loosen the belt (Figure 30).
Figure 30
1. Control knob
3. Slowly pull the lawn mower 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 31).
Figure 31
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 (Figure 13).
3. Remove the bolt, the wheel spacer, and the locknut
mounting the wheel to the pivot arm (Figure 32).
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 32).
Note: If you remove the bearings from the
bearing/hub assembly, remove them by pressing on
the bearing spacer (Figure 32).
Assembling the Wheels
1. Position the tire onto one wheel half, aligning the
lugs on each (Figure 32).
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 32).
3. Place the other wheel half onto the bearing/hub
assembly, aligning the wheel and the tire lugs and the
mounting holes (Figure 32).
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 32).
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 32).
6. Install the 2 bolts and 2 locknuts previously removed
in the remaining holes in the wheel halves and
23
Figure 32
6. Plastic cover (rear wheels
only)
7. Lug
8. Bearing (2)
9. Bolt
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