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C and D series mowers
Transmission Internal Workings
NOTE: There are no internal parts for this transmission available through MTD. If the transmission in a
C or D series mower fails, replace it as a complete assembly. This section explains the internal opera-
tion of the transmission so that technicians have a better understanding of how it works. If a technician
actually sees any of the parts shown in this section of the manual, they have probably made a mistake.
1.
The input shaft drives a worm gear within the trans-
2.
The worm gear turns a helical gear that drives the
axles.
3.
The helical gear and axles are supported by a pair of
axle bearings. Blue-colored thust washers control
axle end-play. See Figure 4.64.
4.
The retainer for the bearing that supports the worm
gear also has two spring arms that drag against the
shoulders of the helical gear assembly.
See Figure 4.65.
52
Helical gear
m
i
s
s
i
o
n
.
Bearing and seal
assemblies
Figure 4.64
Worm gear
Spring arms
Figure 4.65
Worm gear
Thrust washers
Bearing retainer
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