Great Plains 8030-3P Wide Row Planters - Manual (Page 11)

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9 4/9/04 Great Plains Mfg., Inc.
Section 3 Hydraulic System
3-Point Wide Row Planter Flat Fold Marker 113-519M
Adjusting The Hydraulics
1. Be sure tractor hydraulic reservoir is full.
!
CAUTION!
Never allow anyone near the drill when cycling the markers.
2. The marker hydraulic system is equipped with nee-
dle valves to control how fast each marker operates.
The needle valves are built into the sequence valve
body. There are two hex adjustment heads, one for
controlling marker speed up and one for controlling
marker speed down. To adjust the speed of each
marker, screw the needle valve clockwise to adjust
the marker speed to a low setting. Fold the marker
up and down a few times and recheck for pinching
and kinking of hoses. With the tractor engine at an
operating rpm, adjust the needle valve to limit the
marker to a safe operating speed. Excessive folding
speeds can cause marker damage.
!
CAUTION!
Escaping Fluid under pressure can have sufficient force to
penetrate the skin. Check all hydraulic lines and houses be-
fore applying pressure. Fluid escaping from a very small hole
can be almost invisible. Use paper or cardboard, not body
parts, to check for suspected leaks. If injured, seek medical as-
sistance form a doctor that is familiar with this type of injury.
Foreign fluids in the tissue must be surgically removed within
a few hours or gangrene will result.
General Notes
If both markers are required down at the same time run
one marker down, momentarily start to raise it, reverse
the hydraulic lever and lower the opposite marker. Hold-
ing the lever down then will force both markers down.
If the markers are down they can both be raised simulta-
neously but they can only be lowered one at a time
alternating from one side to the other.
NOTE: JIC fittings do not require high torque. JIC and O-
Ring fittings do not require sealant. Always use liquid pipe
sealant when adding or replacing pipe thread fittings. To
avoid possible danger of cracking hydraulic fittings from
over tightening, DO NOT use plastic sealant tape.
Section 3
Hydraulic System