Toro ProCore SR Series Service Manual page 112

Service and Repairs
Gearbox Service (SR48, SR70 and SR70- -S)
16
15
17
1. Oil seal
2. Retaining ring
3. Shim set (gear backlash)
4. Shim set (input shaft endplay)
5. Tapered bearing (cup and cone)
6. Output shaft
7. Relief vent
8. Ball bearing
Gearbox Disassembly (Fig. 1)
1. Thoroughly clean all corrosion and burrs from output
shaft and input shaft to allow easier gearbox disassem-
bly.
2. Use a marker to make a diagonal line across the
housing and axle tubes for assembly purposes (Fig. 2).
3. Carefully pry cover plate (item 12) from rear of hous-
ing taking care to not damage housing opening. Check
that sealing surface of cover is not damaged. Replace
cover if necessary.
4. Remove socket head screws (item 19) that secure
axle tubes (items 18 and 21) to housing. Slide axle tube
assemblies from gearbox.
5. Use a press to remove output shaft and bearings
from gearbox housing:
Gearbox Service
11
3
19
18 5
2
20
22
4
13
9. Housing
10. Retaining ring
11. Bevel gear
12. Cover plate
13. Input shaft
14. Plug (3 used)
15. Ball bearing
16. Retaining ring
7
12
8
9
2
3
14
23
10
1
Figure 1
NOTE: Shim set (item 3) is used to adjust gearbox
backlash. When removing output shaft, take note of
location and number of shims to assist in gearbox as-
sembly.
A. Remove retaining ring (item 2) and shim(s) (item
3) from ball bearing (item 8) side of gearbox housing.
B. Support bevel gear (item 11) to prevent it from fal-
ling during output shaft removal.
C. Press output shaft toward the ball bearing side of
the housing to remove shaft. Ball bearing (item 8) will
be pressed out of housing during shaft removal. Ta-
pered bearing cone (item 5) and bevel gear will be re-
moved from shaft as the shaft is pressed out of
housing.
D. Remove bevel gear and tapered bearing cone
from housing.
E. Remove ball bearing from output shaft.
Page 7 - - 2
15
16
19
21
20
17. Oil seal
18. Axle tube
19. Socket head screw (6 per tube)
20. O- -ring
21. Axle tube
22. Inner bearing (cup and cone)
23. Outer bearing
ProCore SR Series
6
17