1510P & 1520P
Adjustments
Great Plains
| 118-732M | 4/4/19
41
Marker Adjustments
Bleeding Marker Hydraulics
To fold properly, the marker hydraulics must be free of air.
If the markers fold in jerky, uneven motions, follow these
steps.
You may be injured if hit by a folding or unfolding marker.
Markers may fall quickly and unexpectedly if the hydraulics
fail. Never allow anyone near the drill when folding or
unfolding the markers.
Escaping fluid under pressure can have sufficient pressure to
penetrate the skin. Check all hydraulic lines and fittings before
applying pressure. Fluid escaping from a very small hole can
be almost invisible. Use paper or cardboard, not body parts,
and wear heavy gloves to check for suspected leaks. If injured,
seek medical assistance from 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.
Check that tractor hydraulic reservoir is full.
1.
With both markers lowered into field position, loosen
hydraulic-hose fittings at rod and base ends of
marker cylinders. If applicable, loosen fittings on
back side of sequence valve.
Never bleed an O-ring fitting. Instead, bleed a nearby pipe or
JIC fitting.
2.
With tractor idling, activate tractor hydraulic valve
until oil seeps out around a loosened fitting. Tighten
that fitting.
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 cracking
hydraulic fittings from over tightening, do not use plastic
sealant tape.
3.
Reactivate tractor hydraulic valve until oil seeps out
around another loosened fitting. Tighten that fitting.
Repeat process until all loosened fittings have been
bled and tightened.
