Snapper NZM21520KWV Safety Instructions & Operator's Manual page 13

Section 5 - ADJUSTMENTS & REPAIR
5.8
MOWER SPINDLES (Field Serviceable Spindles)
BEARING REPLACEMENT
In the event that a spindle bearing requires
replacement, the SNAPPER Field Serviceable
Spindles have been designed so that no special
tools or presses are required.
1. Remove belt. Loosen blade nut and remove.
Allow blade bolt, washer, blade and four spacers to
drop down out of the spindle housing. See Figure
5.19.
IMPORTANT: Spindle housing must be filled with
grease before operating mower. Failure to fill
housing will cause premature bearing failure.
®
REMOVE NUT _O'_ REMOVE BELT
[ _ FROM SPINDLE
BLADE
FIGURE 5.19
2. Remove spindle pulley from spindle shaft.
3. Locate circular retaining ring on spindle shaft at
top bearing. Remove retaining ring. Allow spindle
shaft to drop out of housing.
4. Top and bottom bearings are now removable.
Pull out on inner race to slide bearing from
housing. See Figure 5.20.
5. Thoroughly clean all parts removing all old
contaminated grease.
6. Install new bottom bearing first.
7. NOTE: The bearing is sealed/shielded on one
side only. The bottom bearing must be installed
with the sealedtshielded side DOWN.
8. Insert spindle shaft up through the bottom
bearing. Slide spacer down over spindle shaft.
9. Install new top bearing. Install the top bearing
with the seallshield UP.
10. Slide circular retaining ring down spindle shaft
until it fully locks into groove on shaft.
11. Apply a generous amount of general-purpose
grease to the concave side of the nylos seal. Install
the nylos seal with concave greased side down.
12. Place spindle pulley and spacer on top of
spindle shaft.
13, Reinstall blade bolt, washer, blade and four
spacers. See Figure 5.15
14. Torque blade bolt and nut to 70 to 80 ft. Ibs.
15, Pump grease into spindle housing until grease
purges from vent on housing.
16. After the first 5 hours of operation, grease
spindle housing to insure it is full, then every 25
hours.
I
I EARING I SEAL UP
DowNBEARING SEAL I
SPACER
GO NYLOS SEAL
RETAINING RING
BEARING
SPINDLE
HOUSING
i_P SPACER
OO BEARING
SPINDLE
SHAFT
FIGURE 5.20
28