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
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.
30 Dealer Service
(Rev. 5/11/2010) MAN0632 (5/15/2007)
