Toro ProCore SR Series Service Manual page 56

Coring Head Drive Chain
PROCORE SR54 SHOWN
1
5
11
8
1. Cap screw
2. Cap screw
3. Idler sprocket
4. Offset spacer
5. Lock nut
NOTE: The coring head drive chain assemblies for Pro-
Core SR54 and SR70 aerators are very similar. The Pro-
Core SR54 is shown in Figure 13.
Disassembly (Fig. 13)
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.
3. Loosen cap screw (item 2) and lock nut (item 5) to re-
move idler tension on drive chain.
Coring Head (SR54 & SR70)
1
2
3
4
7
6. LH idler bracket
7. Lock nut
8. Idler rod
9. Drive chain
9
10
Figure 13
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
clip and master link from drive chain. Locate and remove
master link O--rings.
5. Remove drive chain from gearbox, coring crankshaft
and idler sprockets (Fig. 14).
6. If necessary, remove idler assembly using Figure 13
as a guide.
7. If necessary, remove sprocket(s) from gearbox shaft
(see Coring Head Drive Sprockets Disassembly in this
section).
Page 4 - - 18
4
3
2
13
12
13
FRONT
RIGHT
10. Master link assembly
11. RH idler bracket
12. Gearbox
13. Gearbox sprocket
ProCore SR Series
5
6
7
8
7
9
10