Service Manual

ProCore 864/1298 Page 4 − 33 Coring Head
Removal (Fig. 32)
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 to allow access to depth control
assembly (see Cover Removal in the Service and Re-
pairs section of Chapter 3 − Chassis).
4. Use compression spring tool (see Special Tools) to
compress coring head compression spring(s) slightly.
The springs do not have to be removed from machine.
A. Install compression spring tool threaded rod
through holes in each spring cup (item 7), then install
washer and nut on both ends of rod.
B. Tighten upper nut on rod to compress spring
(item 6) until upper spring cup is approximately 1/2”
(13 mm) from spring seat on hitch frame.
C. If working on ProCore 864, repeat for second
compression spring.
CAUTION
The ProCore 864 coring head frame assembly
weighs approximately 900 pounds (408 kg). The
ProCore 1298 coring head frame assembly
weighs approximately 675 pounds (306 kg).
Make sure that proper lift or hoist is used to sup-
port coring head frame during repairs.
5. Use suitable lift or hoist and lifting eyelets on coring
crankshaft as lift points (Fig. 33) to raise coring head.
Raise coring head so that clearance exists between
depth control assembly and pad on hitch frame.
6. Use appropriate jackstands or blocking to support
the coring head to prevent it from shifting or lowering.
7. Remove four (4) carriage screws and flange nuts
that secure depth control assembly to coring frame.
8. Remove depth control assembly from coring frame.
Installation (Fig. 32)
1. Make sure that coring frame is supported in a raised
position to prevent unexpected lowering of coring frame.
2. Position depth control assembly to coring frame.
3. Secure depth control assembly to coring frame with
four (4) carriage screws and flange nuts.
4. Use appropriate hoist to lower coring frame so that
depth control assembly is supporting coring frame.
5. Remove compression spring tool from coring head
compression spring(s):
A. Loosen lower nut on threaded rod to allow spring
(item 2) to extend. Make sure that upper spring cup
(item 1) extends into spring seat on hitch frame.
B. Remove compression spring tool components
(threaded rod, washers and nuts) from spring.
C. If working on ProCore 864, repeat for second
spring.
6. Adjust aerator to desired depth setting.
7. Install front cover to machine (see Cover Installation
in the Service and Repairs section of Chapter 3 − Chas-
sis).
8. Install rear hood to machine.
1. Bearing housing 2. Lifting eyelet
Figure 33
2
1
Coring Head