Service Manual
ProCore 864/1298 Page 4 − 25 Coring Head
5. Loosen lock nut (item 15) that secures idler nut in
position on idler spring mount. Loosen idler nut (item 16)
to remove idler tension on drive belt.
CAUTION
Be careful when lifting the idler pulley. The idler
pulley is spring loaded and may cause personal
injury.
6. Lift and hold idler pulley away from belt. Remove belt
from drive pulley. Carefully lower idler pulley.
7. Loosen and remove two (2) flange nuts and hard-
ened D washers that secure rotolink damper for #1
stomper arm (see Rotolink Damper Disassembly in this
section). Lower rotolink damper from coring head frame.
8. Remove drive belt from driven pulley on coring
crankshaft.
9. Route drive belt down through coring head frame
and around lower end of #1 stomper arm to remove cor-
ing head drive belt from machine (Fig. 24 and 25).
Installation (Fig. 22)
1. Route drive belt around lower end of #1 stomper arm
and up through coring head frame (Fig. 24 and 25).
2. Position drive belt to driven pulley on coring crank-
shaft.
3. Lift idler pulley, route drive belt under idler pulley and
install belt onto drive pulley (Fig. 23).
4. Apply tension to idler pulley by adjusting idler nut
(item 16) until compression spring length is 5.750” (145
mm). Secure idler nut location with lock nut (item 15).
5. Raise rotolink damper for #1 stomper arm to coring
head frame. Make sure that damper standoffs and
bumper are on damper studs. Secure damper to coring
head frame with two (2) D washers and lock nuts (see
Rotolink Damper Assembly in this section).
6. Make sure that tinnerman nuts (item 1), flat washer
(item 8) and cap screw (item 9) are on frame. Position
belt guard to machine. Secure belt guard to support with
flange nut (item 7), two (2) flange head screws (item 6)
and flat washers (item 5).
7. Install pulley shield to machine (see Cover Installa-
tion in the Service and Repairs section of Chapter 3 −
Chassis).
8. Install rear hood to machine.
1. Drive belt 2. #1 stomper arm
Figure 24
1
2
1. Drive belt 2. #1 rotolink damper
Figure 25
1
2
1. Idler pulley
2. Drive belt
3. Compression spring
4. Idler nut
5. Lock nut
Figure 26
1
2
3
4
5
5.750”
(145 mm)
Coring Head