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26 Dealer Service
MAN0670 (11/16/2007)
9. Secure snap ring (13) on input shaft (3) if not
already secure.
10. Place gear (1) through top of housing and align
gear (1) and gear (5) so that gear teeth are a
match.
11. While holding gear (1) in place, slide input shaft (3)
through gear (1) and bearing (8). Align splines on
shaft (3) and gear (1).
12. Slide spacer (14) over input shaft (3) and press
bearing onto input shaft (3), using a round tube of
the correct diameter and a hand press.
13. Slide shim (15) over input shaft (3) and secure with
snap ring (12).
14. 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 (8). Repeat until end float is less than
0.012". Check rotational torque by hand. The
torque should be less than 2.2 lbs-inch.
15. Check that the gear backlash is between 0.006"
and 0.016". You should not have to adjust the
backlash.
16. Press in input oil seal (22), using tube of correct
diameter. Be careful not to damage seal lip.
17. Press oil cap (23) on to cover the rear of housing,
using a tube of the correct diameter.
18. 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.
19. 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.
Reinstall Gearbox
NOTE: Gearbox is heavy: do not attempt to move
without mechanical assistance.
1. Set gearbox on cutter and fasten with bolts and
nuts. Torque bolts to 175 lbs-ft
2. Attach crossbar (See Crossbar Installation, page
28).
GEARBOX REPAIR
(ON CAST/CROWN TOP) (Figure 18)
Refer to Figure 18.
NOTE: Repair to this gearbox is limited to replacing
bearings, seals, and gaskets. Replacing gears, shafts,
and a housing is not cost effective. Purchasing a com-
plete gearbox is more economical.
NOTE: Replacing a complete flat top gearbox with
a complete crown top gearbox will require replac-
ing the cross bar assembly. See pages 36 and 37.
Gearbox is heavy: do not attempt to move without
mechanical assistance.
Vertical Shaft Repair (Cast/Crown Top)
1. Disconnect and remove the rear driveline from the
gearbox. See Figure 18, page 27.
2. Remove vent plug (9) and siphon gear lube from
housing through this opening.
3. Remove crossbar (see Crossbar Removal, page
27).
4. Remove output cap (17) and output seal (16) by
removing four cap screws (13) and washers (12).
Replace with new seal (see Seal Installation,
page 23).
Vertical seal should be recessed in output cap.
NOTE: Distortion to seal cage or damage to seal
lip will cause seal to leak.
5. Secure output cap (17) on to bottom of gearbox
using four cap screws (13) and lock washers (12).
NOTE: Make sure output gasket (10) and (11) are
in place.
6. Fill gearbox with SAE 80W or 90W gear lube until it
runs out the side level plug.
7. Remove and replace any seal damaged in
installation.
Horizontal Leak Repair (Cast/Crown Top)
1. Disconnect and remove the rear driveline from the
gearbox.
2. Remove vent plug (9) and siphon gear lube from
housing through this opening.
3. Remove input seal (4). Replace with new one
(refer to Seal Installation, page 23).
4. Fill gearbox with SAE 80W or 90W gear lube until it
runs out the side level plug.
(Rev. 8/29/2011)