Toro ProCore SR Series, Service Manual, Page: 84 / 122

ProCore SR Series Page 5 -- 22 Coring Head (SR48 & SR72)
Gearbox
1. Idler shaft
2. Master link assembly (2 used)
3. Jam nut (grooved)
4. Jam nut
5. Idler sprocket
6. Lock nut
7. Sprocket hub (2 used)
8. Cap screw (4 used)
9. Sprocket (2 used)
10. Saddle bolt (10 used)
11. Lock washer (4 used)
12. Drive chain (2 used)
13. Lock nut (10 used)
14. Lock washer
15. Gearbox assembly
16. Bolt
17. Hex nut
18. PTO driveshaft
19. Square key
20. Driveshaft shield
21. Cap screw (4 used)
22. Lock washer (4 used)
23. Flat washer (4 used)
24. Cap screw (3 used per hub)
25. Cap screw (3 used per sprocket)
Figure 20
PROCORE SR72 SHOWN
3
6
8
9
10
11
13
1
7
12
15
16
17
18
19
20
4
6
5
5
4
1
3
7
9
21 22
23
24
25
14
14
14
14
24
19
25
17
16
2
2
12
FRONT
RIGHT
NOTE: Gearbox installation for ProCore SR48 and
SR72 series aerators is very similar. The ProCore SR72
is shown in Figure 20.
Gearbox Removal (Fig. 20)
1. Position aerator on a firm, level surface. If aerator is
attached to tractor, disengage PTO, apply tractor park-
ing brake, stop engine and remove key from the ignition
switch.
2. Remove screens from aerator frame (see Covers
Removal in the Service and Repairs section of Chapter
3 -- Chassis).
3. Drain lubricant from gearbox.
4. Disconnect PTO driveshaft from gearbox input shaft
(see PTO Driveshaft Removal in the Service and Re-
pairs section of Chapter 3 -- Chassis).