Toro ProCore SR Series Service Manual page 80

Coring Head Drive Chain
PROCORE SR72 SHOWN
13
10
2
6
12
FRONT
RIGHT
1. Idler shaft
2. Master link assembly
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)
NOTE: The drive chain assemblies for ProCore SR48
and SR72 series aerators are very similar. The ProCore
SR72 is shown in Figure 16.
Disassembly (Fig. 16)
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. Raise and support rear hood.
Coring Head (SR48 & SR72)
1
17
3
16
4
5
11
8
17
16
9
7
24
14
19
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
1
15
25
14
20
Figure 16
3. Loosen jam nut (item 3), hex nut (item 17) and bolt
(item 16) to loosen idler tension on drive chain.
4. Rotate coring crankshaft until drive chain master link
is located at gearbox sprocket. Note direction of closed
end of master link clip for assembly purposes. Remove
master link from drive chain. Locate and remove master
link O--rings.
5. Remove drive chain from gearbox, coring crankshaft
and idler sprockets (Fig. 17).
Page 5 - - 18
FLAT
12
6
5
4
3 7
9
24
14
14
25
23
22 21
18
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)
ProCore SR Series
2
19