Service Manual

MOWER DECKS
6 - 6 Mid-Mount Z Service Manual
14. A large snap ring is still inside the spindle housing.
It locates the matched bearing set in the bore of
the spindle housing. There is no need to remove
and replace this snap ring (Figure 125).
Figure 125
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Assembly
15. Thoroughly clean and inspect the parts prior to
assembly:
A. Spindle shaft for bearing surface damage or
signs of impact. Also check for damage to the
threaded areas for both the blade bolt and
pulley retention nut.
B. Bottom bearing spacer for wear. If the spacer
is damaged, the seal may not be able to keep
dirt out properly.
C. Bearings for wear. If reusing the bearings,
you must examine them carefully for wear.
Also, make sure to put the same bearing and
bearing saddle together as they were. As
noted above, look for pitting on the rollers of
the bearings and replace the bearing set if any
pitting is present.
NOTE: If using compressed air to dry the bearing
after cleaning, DO NOT allow it to spin. The
bearing could come apart and cause serious
injury. Always wear safety glasses.
D. Spindle housing for any damage or wear.
E. Pulley assembly - If the shaft shows signs of
wear, inspect the pulley for excessive wear in
the splines. If excessive wear is found,
replace the pulley. Excessive wear of the
splines will show up as a sharp edge on the
splines.
NOTE: New bearings are only available in
matched sets. The matched set is necessary
because the bearing endplay is not adjustable.
The small “C” shaped spacer is machined to
specifically match the bearings in the set. The
advantage of a matched set is the ability to torque
the assembly to a specified value and have a
preset endplay. Alternatively, most tapered
bearing applications use either a crush washer or
a castle nut with key as a means to set endplay.
16. Install the snap ring into spindle housing. Discard
the new snap ring if the spindle housing is being
reused.
17. Press in lower bearing cup until it firmly contacts
the snap ring (Figure 126).
NOTE: The machined stop for the seal may
cause your driver to stop before the bearing cup is
seated completely. NEVER use a punch to drive
in a bearing cup. This will damage the cup.
Figure 126
1101-003
18. Slide in the large spacer in from the top until it also
contacts the snap ring. Now press the upper
bearing cup in against the spacer. Apply a layer of
grease to both bearing surfaces.