Detent Shaft - MTD 450 Series Shop Manual

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Detent shaft

Detent shaft
Shift arm
Shift fork
spacer
Figure 5.50
Shift fork
Figure 5.51
Figure 5.52
Input spur gear
Detent ball
Detent spring
Long shoulders
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1. The detent shaft assembly can be lifted out of the
chain case housing in tandem with the input pinion.
See Figure 5.50.
2. As the detent shaft, shift fork, spacer (below shift
fork) and input pinion slide up the shift arm, it can be
disengaged from the shift fork.
3. Detent shaft disassembly: the shift fork can be
pushed off of the shaft.
4. A spring-loaded ball in the shift fork stops the fork's
travel at each of the grooves in the detent shaft.
See Figure 5.51.
5. Capture the ball and spring as the end of the shaft
passes the bore that they fit into.
6. Orientation for reassembly: See Figure 5.52.
• The long shoulder on the shift fork should be
near the end of the detent shaft that has the
longer span from the end of the shaft to the
nearest detent groove.
• The spacer fits against the flat side of the shift
fork.
7. Reverse the removal process to install the detent
shaft.
7a. Fit the shift fork into the input pinion.
• The wider set of teeth on the input pinion should
be near the long shoulder on the shift fork.
• The narrow set of teeth on the input pinion
should be near the spacer on the detent shaft.
7b. Slide the input pinion down the hexagonal input
shaft with the shift fork in place.
7c. Engage the shift arm pin into the slot in the shift
fork as the assembly goes down.
Chain Case
45