MTD 450 Series Shop Manual page 40

For Parts Call 606-678-9623 or 606-561-4983
450 Series Tillers
8. Press or drive the replacement bearing into the hous-
ing using an appropriate size arbor or driving tool that
will not damage the thrust surface of the bearing.
See Figure 5.27.
• Press the bearing completely home. The flange
of the bearing should rest against the inside of
the housing.
• If the bearings are not fully seated, thrust clear-
ance between the axle and its bearings may be
less than zero, causing the case to bind and
accelerating bearing wear.
9. The wheel axle speed reduction gear shaft can be
removed to get the reduction gear out of the bottom
of the chain case.
10. Double-nut the reduction gear shaft so that it can be
held from rotating, then remove the nut and Belleville
washer from the bottom of the shaft using an 11/16"
wrench. See Figure 5.28.
11. There is a washer beneath the wheel axle speed
reduction gear. The I.D. of the washer is smaller than
the shoulder on the shaft. The washer fits between
the bottom lip of the shaft and the lower chain case
housing. See Figure 5.29.
12. When putting the chain case back together, leave the
reduction gear shaft loose until the wheel axle, chain,
reduction gear, and sprocket are installed.
13. Reverse the removal process to reinstall the wheel
axle and the wheel speed reduction shaft assembly.
36
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Hydraulic ram
Arbor (socket)
Bearing
Case
Figure 5.27
Wheel axle speed reduction shaft
Figure 5.28
Reduction gear
Washer
Figure 5.29