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20 Dealer Service
51642 (Rev. 11/9/2007)
Blade Spindle Assembly (Figure 13)
Bearing cones and cups are designed to work together.
It is important to position them so bearing cone taper
mates with cup taper.
Lubricate new cups with a light oil. Place them in spin-
dle housing so they will mate with bearing cones. Cups
and cones are a press fit to minimize wear.
Seat cups securely with a press or place a large drift in
the flat lip and drive cups into housing until they seat
against machined shoulder of housing.
Place bottom bearing cone onto spindle shaft with
taper positioned to mate with cup. Press onto shaft and
seat on bottom shoulder of shaft.
Insert shaft and bearing through bottom of housing.
Fill housing cavity with a medium grade grease.
Install top bearing on shaft to mate with top cone.
Apply a thin coat of Permatex to shaft area where
sleeve will seat. Install sleeve on shaft and press
sleeve and bearing into housing until all free play is
removed and there is a very light drag on bearings
(similar to adjusting front wheel bearings on an auto-
mobile). Check by spinning spindle. It should turn
freely.
Be careful not to overtighten bearings. Proper bearing
adjustment is essential to good bearing life. Should you
overtighten bearings, hold spindle housing and rap
spindle shaft with a lead hammer.
Place a rag over bearings to protect them and drill a
3/16" hole 9/32" down from top of sleeve and drive roll
pin through sleeve and shaft to hold bearing adjust-
ment. Make sure roll pin does not extend past outer
diameter of sleeve on either side.
NOTICE
■ Improper positioning of seals can cause seal
damage.
Proper seal installation is important. An improperly
installed seal will leak and could cause bearing failure.
Pull the rubber portion of seal back and locate spring.
Lightly coat area of housing where seals seat with Per-
matex. Install bottom seal with spring up toward center
of housing.
Place seal squarely on housing and select a piece of
pipe or tubing with an OD that will set on outside edge
of seal. A tubing with an OD that is too small will bow
seal cage.
Carefully press seal into housing, preventing distortion
to metal seal cage. Seal should seat firmly and
squarely against machined shoulder in housing.
Make sure seal lip did not roll under. Distortion to seal
cage or damage to seal lip will cause seal to leak.
Damaged seals must be replaced.
Carefully press top seal in with spring up away from
center of housing. Top seal should be flush with, to
1/16" above, housing.
Lubricate spindle with a medium grade grease. Rotate
housing on spindle shaft, checking for free movement.
Blade Spindle Installation
Install spindle through bottom of mower and install four
mounting bolts. Be sure to position grease fittings
toward lubrication access areas.
Blade Spindle Pulley Installation
Insert bolts through unthreaded holes in bushing and
start into threaded holes of pulley. Install pulley, split
taper bushing and key to spindle shaft. Set pulley
dimension (see Figure 14) from top of mower frame
and alternately tighten bushing bolts. Continue alter-
nate tightening sequence until assembly is tight and all
bolts are torqued to 12 lbs-ft.
Figure 14. Belt Pulley Height Adjustments
Make sure shields and guards are properly
installed and in good condition. Replace if damaged.