2
9.
Align the roller arm mounting holes with the side plate
mounting holes (Fig. 4).
10.
Secure the roller arms to the side plates with 5/8 x 2”
capscrews, .656 x 1.312 washers, flange bushings and
5/8 locknuts (Fig. 4).
1
2
5
3
4
Figure 4
1. Roller arm
2. Side plate
3. Capscrew
4. Flat washer
5. Flange bushing
11.
Secure the spring assembly to the side plate and the
roller arm with spring brackets, 3/8 x 1” carriage bolts
and 3/8 flange nuts (Fig. 5). Make sure the tabs on the
spring trunnions fit into the slots in the mating parts.
1
2
3
Figure 5
1. Spring assembly
2. Spring bracket
3. Spring trunnion
12.
Grease each roller fitting with No. 2 Lithium Based
grease, approximately 1/2 oz. (15 ml) per end..
13.
Loosen the lower nuts securing the scraper arms to the
roller arms (Fig. 6). Adjust the roller scraper until
there is approximately .060” clearance between the
roller and the scraper. Tighten the nut.
1
Figure 6
1. Scraper adjusting nuts
2.
14.
Tighten all the fasteners.
Note:
The spring is pre–adjusted at the factory but to
insure proper down pressure on the roller make sure the
compressed spring length is 15.00 inches. Adjust as
required.
Operating Tips
•
Shortening the spring adjustment does not increase the
operating down pressure. It will raise the transport
height and delay the contact with the ground when
engaging the coring head.
•
Hole quality can be dependent on many factors. Refer
to
Operating Tips
in the ProCore 648
Operator’s
Manual
for additional suggestions.
