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Groundsmaster 5900/5910 Cutting DecksPage 8 -- 17
3. Using an arbor press, push the bearing cups into the
top and bottom of the spindle housing. The top bearing
cup must contact the outer bearing spacer previously
installed, and the bottom bearing cup must contact the
snap ring. Make sure that the assembly is correct by
supporting the firstbearing cup and pressing the second
cup against it (Fig 16).
4. Pack the bearing cones with grease. Apply a film of
grease on lips of oil seals and O--ring.
5. Install lower bearing cone and greased oil seal into
bottom of spindle housing. Note: The bottom seal must
have the lip facing out (down) (Fig. 17). This seal instal-
lation allows grease to purge from the spindle during the
lubrication process.
IMPORTANT: If bearings are being replaced, make
sure to use the spacer ring that is included with new
bearing set (Fig. 15).
6. Slide spacer ring and inner bearing spacer into
spindle housing, then install upper bearing cone and
greased oil seal into top of housing. Note: The upper
seal must have the lip facing in (down) (Fig. 17). Make
sure upper seal is flush to 0.060” (1.5 mm) recessed to
housing surface.
7. Inspect the spindle shaft and shaft spacer to make
sure there are no burrsor nicks that could possibly dam-
age the oil seals. Lubricate the shaft and spacer with
grease.
8. Install spindle shaft spacer onto shaft. Place thin
sleeve or tape on spindle shaft s plines to prevent seal
damage during shaft installation.
9. Carefully slide spindle shaft with spacer up through
spindle housing. The bottom oil seal and spindle spacer
fit together when the spindle is fully installed.
10.Install greased O--ring to top of spindle shaft.
11.Install pulley (hub down), hardened washer and lock
nut to spindle shaft. Tighten lock nut from 130 to 150 ft--
lb (176 to 203 N--m).
IMPORTANT: Pneumatic grease guns can produce
high pressure inside spindle housing that can dam-
age spindle seals. Pneumatic grease guns, there-
fore, are not recommended to be used for greasing
of spindle housings.
12.Attach a hand pump grease gun to grease fitting on
housing and fill housing cavity with grease until grease
starts to come out of lower seal.
13.Rotate spindle shaft to make sure that it turns freely.
1. Bearing cups
2. Large snap ring
3. Large outer spacer
4. Arbor press
5. Support
6. Arbor press base
Figure 16
PRESS
5
2
4
3
6
1
1. Bottom seal installation 2. Upper seal installation
Figure 17
UP TO 0.060” (1.5 mm)
1
2
Cutting Decks