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30 Dealer Service
MAN0632 (5/15/2007)
11. Check that the gear backlash is between 0.006"
and 0.016". You should not have to adjust the
backlash.
12. Slide gear spacer (7) and roller bearing (20) on
input shaft (5) and secure with retaining rings (6)
and (8).
13. Slide input seal (4) onto input shaft (5) and press
into housing flush with front using a tube of correct
diameter. Be careful not to damage seal lip.
14. Check gearbox housing for leaks by plugging all
holes except one. Apply 4 psi compressed air and
immerse the gearbox in water to verify that there
are no leaks.
15. Remove gearbox from water and dry off with
compressed air. Add SAE 80W or 90W EP oil until
it runs out of side level hole. Tighten all plugs.
Reassemble Gearbox - Cast Top (BB60X
and BB72X)
1. Clean housing, paying specific attention to areas
where gaskets will be installed.
2. Wash housing and all components thoroughly.
Select a clean area for gearbox assembly. Replace
all seals, bearings, and gaskets. All parts must be
clean and lightly oiled before reassembling.
3. Insert upper output bearing cups (25) in the
housing and press using a round tube with the
correct diameter.
4. Slide shims (26) over output shaft (16). Use the
same thickness as removed as a starting point.
5. Push bearing cone (25) onto output shaft (16).
Shims maybe required between cone (25) and
retaining ring (6) to eliminate any space.
NOTE: Make sure there is no endplay or gaps in
this assembly.
6. Insert output bearing spacer (18) and bearing cone
(25) over output shaft until seats against upper
bearing (25). Press lower bearing cup into position
as shown.
7. Secure output cap (17) with new output seal (16)
installed to bottom of gearbox housing using the
four 10mm x 1.5 x 25 cap screws (13) and lock
washers (12). Use shim gaskets (10) and (11) to
adjust output bearings to a rolling torque of 9 to 12
In-lbs.
NOTE: Be sure output gaskets (10 and 11) are in
place. Apply grease to output seal (16) lip for easy
installation.
8. Place ball bearing (21) at back of housing and
press in socket using a round tube of the correct
diameter and a hand press until fully seated.
9. Insert input shaft (5) part way through housing and
slide gear (3) and retaining ring (6) over input shaft
(5). Keep gear (3) and retaining ring (6) loose.
10. Insert input shaft (5) into roller bearing (21) until
seated against each other.
11. Slide gear (3) forward and attach retaining ring (6)
in groove closest to front of input shaft (5). Slide
gear (3) back against retaining ring (6).
12. Check that the gear backlash is between 0.006"
and 0.016". You should not have to adjust the
backlash.
13. Slide gear spacer (7) and ball bearing (20) on input
shaft (5) and secure with retaining rings (6) and (8).
14. Slide input seal (4) onto input shaft (5) and press
into housing flush with front using a tube of correct
diameter. Be careful not to damage seal lip.
15. Check gearbox housing for leaks by plugging all
holes except one. Apply 4 psi compressed air and
immerse the gearbox in water to verify that there
are no leaks.
Remove gearbox from water and dry off with com-
pressed air. Add SAE 80W or 90W EP oil until it runs
out of side level hole. Tighten all plugs.
(Rev. 5/11/2010)