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Dealer Service 27
MAN0707 (5/30/2008)
correct diameter. Be sure not to damage the seal
lip.
8. Press in housing so that seal is recessed. Press
protective seal (8) until seated flush with housing.
Verify that the seal (8) is seated correctly.
9. Press bearing (7) into the housing, using a round
tube of the correct diameter and a hand press.
Secure with shim (13) and snap ring (10).
10. Secure snap ring (11) on input shaft (3) if not
already secure.
11. Place gear (1) through top of housing and align
gear (1) and gear (5) so that gear teeth are a
match.
12. While holding gear (1) in place, slide input shaft (3)
through gear (1) and bearing (7). Align splines on
shaft (3) and gear (1).
13. Slide shim (12) over input shaft (3) and press
bearing (7) onto input shaft (3), using a round tube
of the correct diameter and a hand press.
14. Slide shim (13) over input shaft (3) and secure with
snap ring (10).
15. Check input shaft end float by moving the input
shaft (3) by hand. If end float is higher than 0.012",
insert shim between input shaft (3) and rear
bearing (7). Repeat until end float is less than
0.012". Check rotational torque by hand. The
torque should be less than 2.2 lbs-inch.
16. Check that the gear backlash is between 0.006"
and 0.016". You should not have to adjust the
backlash.
17. Press in input oil seal (19), using tube of correct
diameter. Be careful not to damage seal lip.
18. Press oil cap (20) on to cover the rear of housing,
using a tube of the correct diameter.
19. Place top cover (22) on top of housing and secure
with six cap screw (23).
20. 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.
21. 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.
Reinstallation
NOTE: Gearbox is heavy: do not attempt to move with-
out mechanical assistance.
1. Set gearbox on cutter and fasten with bolts and
nuts. Torque bolts to 300 lbs-ft.
2. Attach crossbar (Crossbar Installation, page 31).
Figure 13. Gearbox
1. Crown gear
2. Gearbox housing
3. Input shaft
4. Output shaft
5. Gear pinion
6. Bearing
7. Input bearing
8. Protective seal
9. Cotter pin
10. Snap ring
11. Snap ring
12. Shim, 45.3 x 2.5
13. Shim, 70.3 x 84.7
14. Nut
15. Castle nut
16. Shim, 50.3 x 70.3
17. Shim
18. Oil seal (Vertical Shaft)
19. Oil seal (Horizontal Shaft)
20. Cap
22. Top cover
23. Cap screw 8 mm x 16 (8.8)
24. Vent plug
25. Cotter pin
26. Washer