MTD 450 Series Shop Manual page 48

For Parts Call 606-678-9623 or 606-561-4983
450 Series Tillers
6. With the counter shaft removed, the bottom gear
(wheels reverse drive) and the washer that fits
beneath it can be maneuvered out of the housing.
See Figure 5.48.
Assembly Tip: Note the orientation of the counter
shaft in the chain case housing:
• There are two snap rings on the shaft, each one
positions a gear.
• The top gear is thicker, so the longer section of
shaft partitioned by a snap ring goes up.
• The bottom gear is thinner, so the shorter section
of shaft partitioned by a snap ring goes down.
• The washer is captive under the shaft once it is
installed.
• The bottom gear can be removed if the snap
rings are removed, the input spur gear is
removed, and the gears and sprockets are
removed from the main shaft.
Assembly Tip: Note the position and orientation of
the bottom counter shaft gear:
See Figure 5.49.
• One side of the gear is flat.
• The flat side faces down, against the washer,
when it is installed.
• The other side of the gear has a shoulder on the
body of the gear, and the teeth are pointed so
that they slide easily into engagement with the
lower set of teeth on the input pinion gear.
• The shoulder and the pointed side of the teeth
must face up, toward the snap ring on the shaft,
when the gear is installed in the chain case hous-
ing.
7. Reverse the removal process to install the counter
shaft assembly.
Assembly Tip: Assembly tip: It is best to leave the
shaft loose until the case halves are back
together to ensure proper shaft alignment.
44
www.mymowerparts.com
Wheels
reverse gear
Figure 5.48
The flat side of the
wheels reverse
gear on the
counter shaft faces
the washer (down)
Figure 5.49
The shoulder and
pointed edge of the
teeth face up