Great Plains CPH-20 Operator Manual User Manual
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Section 1 Preparation and Setup
CPH Center Pivot Hitch 148-152M
12/29/2011
Great Plains Mfg., Inc.
Bleeding Transport Lift Cylinders
The transport-lift cylinders are rephasing cylinders and re-
quire a special procedure for bleeding air from the circuit.
Read and follow procedure carefully. Cylinders will not
function properly with air in the hydraulic circuit.
1.
Check hydraulic fluid in tractor reservoir and fill to
proper level. Add fluid to system as needed. Trans-
port-lift-cylinder capacity is about 2 gallons (7.57 li-
ters).
2.
Jack up and support hitch frame.
3.
Remove 1/2-inch nylock nuts on spring side of cylin-
der-support brace. Unpin cylinders. Do not alter posi-
tion of jam nuts on center of support-brace bolts.
4.
Turn cylinders to a position where rod ends are higher
than base ends. Support cylinders in a safe location.
5.
Start tractor and run engine at idle speed. With rod
ends higher than base ends, hydraulically extend cyl-
inders. After cylinder rods are fully extended, continue
to hold control lever for one minute before hydrauli-
cally retracting cylinders.