Great Plains CPH-20 Operator Manual - Manual (Page 13)

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Section 2 Operating Instructions
12/29/2011 CPH Center Pivot Hitch 148-152M
Great Plains Mfg., Inc.
Section 2
Operating Instructions
This section covers general operation. Experience, ma-
chine familiarity and the following information will lead to
efficient operation and good working habits. Always oper-
ate farm machinery with safety in mind.
Prestart Checklist
1. Carefully read “Important Safety Information,” be-
ginning on page 1.
2. Lubricate implement as indicated under Lubrication,
“Maintenance and Lubrication,” page 19.
3. Check all tires for proper inflation as indicated on Tire
Inflation Chart, “Appendix,” page 24.
4. Check all bolts, pins and fasteners. Torque as speci-
fied on Torque Values Chart, “Appendix,” page 24.
5. Check implement for worn or damaged parts. Repair
or replace before going to the field.
6. Check hydraulic hoses, fittings and cylinders for leaks.
Repair or replace before going to the field.
Field Operation
1. Hitch center pivot hitch and drill to a suitable tractor.
Refer to Hitching Tractor to Hitch and Hitching Drill to
Hitch, “Preparation and Setup,” page 7.
2. Unlock pivot-lock tubes. Refer to Pivot Lock Tubes,
this page.
3. Hydraulically adjust coulters to desired depth. Note
reference measurement on tongue-cylinder gauge to
help you achieve the same coulter depth with each
field pass. Refer to Coulter Depth, “Adjustments,”
page 13, for further adjustment instructions.
4. Set drill seeding rate. Refer to drill operator’s manual.
5. Load drill box with clean seed.
6. Pull forward, lower coulters and drill and begin seed-
ing.
7. Always lift coulters and drill out of ground when turn-
ing at row ends and for other short turns. Seeding will
stop automatically as drill is raised.
Pivot Lock Tubes
The pivot-lock tubes are located behind the stabilizer cyl-
inders on each side of hitch. See Figure 2-1.
Figure 2-1
Pivot Lock Tube Location
During normal field operation, operate hitch with pivot-lock
tubes unlocked so hitch can pivot and drill openers can
properly track coulters. Refer to Figure 2-2.
Figure 2-2
Pivot Lock Tubes Unsecured–Normal Field Position
When drilling on steep slopes or transporting, lock pivot-
lock tubes. To lock tubes, turn so tubes are horizontal with
hitch frame. Refer to Figure 2-3.
Figure 2-3
Pivot Lock Tubes Secured–Transport Position
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