Service Manual

ProCore 864/1298 Page 4 − 27 Coring Head
Removal (Fig. 27)
1. Position aerator on a firm, level surface. If attached
to tractor, disengage PTO, apply tractor parking brake,
stop engine and remove key from the ignition switch.
2. Remove rear hood from machine.
3. Remove front cover and pulley shield from machine
(see Cover Removal in the Service and Repairs section
of Chapter 3 − Chassis).
4. Remove coring head drive belt (see Coring Head
Drive Belt Removal in this section).
5. Remove driveshaft from pulley shaft (see Driveshaft
Removal in this section).
6. Remove pulley (item 6) from pulley shaft:
A. Install a .375” − 16 UNC − 2B screw into one of the
threaded pulley holes leaving 1” to 2” of the screw ex-
tending from the pulley surface. Do not tighten screw
with a wrench. Use a suitable pry bar between the
pulley flange and screw extension to prevent the
pulley and pulley shaft from rotating.
B. Remove cap screw and flat washer that secure
pulley to pulley shaft.
C. If needed, the use of three (3) .375” − 16 UNC −
2B screws (see Special Tools) can be installed into
threaded holes of pulley to aid in pulley removal.
Tighten screws progressively and evenly until the
pulley is loose on the pulley shaft.
7. Remove additional components as necessary using
Figure 27 as a guide.
Installation (Fig. 27)
1. Install all removed components using Figure 27 as a
guide.
A. If pulley shaft (item 2) was removed, apply anti-
seize lubricant to shaft bearing surface before sliding
shaft into bearing bores.
B. Apply antiseize lubricant to splines of pulley shaft
(item 2) before installing pulley and driveshaft.
C. As drive pulley (item 6) is being installed, place 0,
1 or 2 shims (item 5) between outer shaft bearing and
drive pulley to align drive pulley with driven pulley on
coring crankshaft. Pulleys should be aligned within
0.070” (1.8 mm).
D. Install a .375” − 16 UNC − 2B screw into one of the
threaded pulley holes leaving 1” to 2” of the screw ex-
tending from the pulley surface. Make sure that the
end of the screw does not contact pulley drive hous-
ing. Use a suitable pry bar between the pulley flange
and screw extension to prevent the pulley and pulley
shaft from rotating.
E. Secure drive pulley to pulley shaft with flat washer
and cap screw. Torque cap screw from 210 to 230 ft−
lb (285 to 311 N−m).
F. Remove screw from pulley hole.
2. Install coring head drive belt (see Coring Head Drive
Belt Installation in this section). Make sure that drive belt
is properly tensioned.
3. Install driveshaft to pulley shaft (see Driveshaft
Installation in this section).
4. Install front cover and pulley shield to machine (see
Cover Installation in the Service and Repairs section of
Chapter 3 − Chassis).
5. Install rear hood to machine.
1. Drive pulley
2. Idler pulley
3. Driven pulley
4. Drive belt
Figure 28
1
2
4
3
Coring Head