Service Manual

ProCore SR SeriesPage 6 -- 18Coring Head (SR75)
Coring Head Drive Chain
1. Idler bolt (2 used)
2. Master link assembly (2 used)
3. Grooved washer (2 used)
4. Jam nut (2 used)
5. Idler sprocket (2 used)
6. Lock nut (2 used)
7. Sprocket hub (2 used)
8. Jam nut (2 used)
9. Sprocket (2 used)
10. Saddle bolt (16 used)
11. Jam rod (2 used)
12. Drive chain (2 used)
13. Lock nut (16 used)
14. Idler bracket (2 used)
15. Gearbox assembly
16. Square key (2 used)
17. Cap screw (3 used per hub)
18. Lock washer (3 used per hub)
19. Idler sprocket jam nut (2 used)
Figure 14
FRONT
RIGHT
2
3
6
8
9
10
11
13
1
5
7
12
14
15
16
17
4
10
18
3
10
10
19
Disassembly (Fig. 14)
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 jam nuts (items 4 and 8) and jam rod (item
11) to remove 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 c hain from gearbox, coring crankshaft
and idler sprockets (Fig. 15).
6. If necessary, remove sprocket(s) from gearbox shaft
(see Coring Head Drive Sprockets Disassembly in this
section).
7. If sprocket r emoval from coring crankshaft is neces-
sary, remove coring crankshaft bearing housing that in-
cludes sprocket and remove sprocket from crank arm
(see Coring Crankshaft Bearing Housing Removal in
this section).
8. If necessary, remove idler assembly using Figure 14
as a guide.