Service Manual

Groundsmaster 4500−D/4700−D Page 6 − 13 Axles, Planetaries and Brakes
NOTE: The planetary drive assembly can be serviced
with the planetary installed to machine. If the spindle
(item 1) needs to be removed, see Planetary Drive As-
sembly in this chapter.
Disassembly (Figs. 7 and 8)
1. Park machine on a level surface, stop engine and re-
move key from the ignition switch.
2. Drain oil from planetary drive/brake assembly; refer
to traction unit Operator’s Manual.
3. Chock rear wheels and jack up front of machine (see
Jacking Instructions in Chapter 1 − Safety). Support ma-
chine with jack stands and remove front wheel assem-
bly.
4. Remove retaining ring (item 17).
5. Remove end cap (item 20). Thrust plug (item 21) and
thrust washer (item 22) usually remain in end cap bore
and should be removed for cleaning and inspection.
6. Remove drive shaft assembly (items 23, 24 and 25)
If necessary, remove retaining ring and primary gear
from shaft.
7. Remove primary carrier (item 26), secondary gear
(item 27) and secondary carrier (item 28).
NOTE: Steps 6 through 10 are necessary only if in-
specting or replacing bearings and/or seals.
IMPORTANT: Do not reuse retaining ring (item 10)
after it has been removed.
8. Remove retaining ring (item 15) and thrust washer
(item 14). Discard retaining ring.
9. Carefully remove housing (item 9) from spindle (item
1). Remove outer bearing cone (item 12).
10.Remove and discard seals (items 2 and 3) and O−
rings (item 13) from housing.
11. Remove inner bearing cone (item 4) from housing. If
necessary, remove bearing cups (items 5 and 11) from
housing.
12.If wheel stud (item 6) removal is necessary, use
press to extract stud(s) from housing.
13.If necessary, remove socket head screws (item 7)
with lock washers (item 8) that secure ring gear (item 16)
to housing. Remove ring gear and two (2) dowel pins
(item 10) from housing.
1. Spindle
2. Boot seal
3. Oil seal
4. Inner bearing cone
5. Inner bearing cup
6. Wheel stud (8)
7. Socket head screw (16)
8. Lock washer (16)
9. Housing
10. Dowel pin (2)
11. Outer bearing cup
12. Outer bearing cone
13. O−ring
14. Thrust washer
15. Retaining ring (external)
16. Ring gear
17. Retaining ring (internal)
18. Plug (2)
19. O−ring (2)
20. End cap
21. Thrust plug
22. Thrust washer
23. Retaining ring
24. Primary gear
25. Drive shaft
26. Primary carrier assy.
27. Secondary gear
28. Secondary carrier assy.
Figure 8
Assembly (Figs. 7 and 8)
1. Thoroughly clean parts in solvent and dry completely
after cleaning. Inspect parts for damage or excessive
wear and replace as necessary.
2. If any wheel studs were removed, use a press to
install new studs into housing. Make sure that stud
shoulder is fully pressed against housing surface.
NOTE: Use new seal and shim kits when assembling
planetary drive.
3. If spindle and housing were separated:
A. Press bearing cups (items 5 and 11) into housing
(item 9). Cups should be pressed fully to shoulder of
the housing bore.
B. Set inner bearing cone (item 4) into inner bearing
cup.
Axles, Planetaries
and Brakes