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Dealer Service 31
MAN0390 (Rev. 4/6/2007)
SPLITTER GEARBOX REPAIR
NOTE: Replacing gears, shafts, bearings, and seals
may not be cost effective. Purchasing a complete gear-
box may be more economical.
REMOVE GEARBOX FROM CUTTER
1. Disconnect driveline from the tractor PTO and
remove it from center gearbox.
2. Remove vent plug (6) and siphon gear lube from
housing through this opening.
3. Disconnect and remove flex coupler drivelines from
side of gearbox by:
a. Removing cap screws and hex nuts from drive-
line.
b. Loosen set screws from flex coupler yoke.
c. Slide flex coupler yoke from gearbox shaft.
4. Remove the four bolts that attach gearbox to cutter
and remove gearbox. Gearbox is heavy; do not
attempt to move without mechanical assistance.
DISASSEMBLE SPLITTER GEARBOX
Refer to Figure 20.
1. Remove breather plug from top of gearbox.
2. Remove plug (19) from side of input housing (1)
and pour out gear oil.
3. Remove eight cap screws (3) from around input
housing (15). Remove input shaft assembly and
housing.
4. Remove oil seals (11) (to be replaced) from both
sides of cross shaft (4).
5. Remove eight cap screws (3) from around gearbox
cover (12) and remove cross shaft (4) from
gearbox.
6. Disassemble shims (5 & 18), spacer (20), bearings
(16 & 13), and crown gear (7) from cross shaft.
7. Support housing in a vise and remove bearing
cones (16) by using a punch and hammer to drive
bearing cone out.
8. Support cover (12) in a vise and remove bearing
cups (13) by using a punch and hammer to drive
bearing cone out.
9. Remove lock nut (2) from end of input shaft (14).
10. Support input housing in a handpress and push
input shaft (14) out of housing.
11. Support housing in a vise and remove bearing
cups (13 & 16) by using a punch and hammer to
drive bearing cones out.
12. Inspect gears for broken teeth and wear. Some
wear is normal and will show on loaded side.
Forged gear surfaces are rough when new. Check
that wear pattern is smooth.
13. Inspect input and cross shafts for grooves, nicks,
or bumps in the areas where the seals seat.
Resurface any damage with emery cloth.
14. Inspect housing and caps for cracks or damage.
Figure 20. Center Gearbox Assembly
1. Gearbox
2. Lock nut
3. M10 x 1.5 x 22 Cap screw
4. Cross shaft
5. Shim, 45.3 x 65.3 x 2.5
6. Vent plug
7. Crown gear
8. Pinion gear
9. Shim, 45.3 x 65.3 x 1
10. Key, 14 x 9 x 40
11. Seal
12. Cover
13. Bearing cup & cone
14. Input shaft
15. Housing, input
16. Bearing cup & cone
17. Seal
18. Shim kit
19. Plug, 3/8 NPT
20. Spacer
21. Key