Great Plains 3-Point Solid Stand Drills - Manual (Page 7)

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5 3/19/03 Great Plains Mfg., Inc.
Section 3 Operating Instructions
113-324M
Installation Instructions
Refer to the parts section of this manual for visual
representation of the parts and their locations.
1. Attach fittings to cylinder ports. Attach the needle
valve and hoses to the cylinder fittings as shown in
Fig.???. Route hoses down to the drill frame and
along the back side of the drill frame tubes to the
center of the drill.
Important: Before folding the marker, bleed all the air
out of the hydraulic system. Refer to "Bleeding of the Hy-
draulics" on page 5.
2. To bleed the air out of the hydraulic system, remove
the marker cylinder pin from the rod end of the cylin-
der, support the cylinder with the base end pin and
block supporting the body of the cylinder on the first
marker section. Cycle the marker cylinder several
times to work the air out of the system.
3. After all of the air is removed from the system, refer
to Fig.??? and repin the cylinder with the clevis pin
(# ), 1/8" cotter pin (# ), and 1" flat washers (# ).
4. Referring to Fig.???, adjust the speed of the marker
with the needle valve (# ) to a low setting. Fold the
marker up and down a few times and recheck for
pinching and kinking of hoses. Reset folding speed
with the needle valve to a safe speed.
Bleeding of the Hydraulics
1. Be sure tractor hydraulic reservoir if full.
Note: Never attempt to bleed an O-ring type fitting. In-
stead, choose a pipe or JIC fitting nearby.
2. With the marker(s) in field position, crack the hy-
draulic hose fitting(s) located at the base end of the
cylinder(s). With your tractor at an idle speed, acti-
vate your tractor hydraulic valve until hydraulic oil
seeps out around the hose ends. Tighten the hose
end fittings and repeat this process with the hose
end fitting(s) located at the rod end of the cylin-
der(s). If dual markers are used with a sequence
valve, follow the procedure above for one marker
cylinder. Then crack the fittings on the back side of
the sequence valve, activate the tractor hydraulics
valve until hydraulic oil seeps out around the hose
ends. Tighten the hose end fittings and repeat the
complete process for the opposite marker cylinder.
3. Fold and unfold the marker(s) slowly in order to work
all the air out of your marker hydraulics. Use caution
when folding and unfolding the marker for the first
time, and check for pinching and kinking of hoses.
!
CAUTION!
Never allow anyone near the drill when cycling the markers.
4. The marker hydraulic system is equipped with a
needle valve to control how fast the marker oper-
ates. Systems without a sequence valve have nee-
dle valves at each cylinder. On systems with a
sequence valve, the needle valve is built into the se-
quence valve body. There are two hex adjustment
heads, one for each side of the drill. To adjust your
markers, screw the needle valve in 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 oper-
ating rpm, adjust the needle valve to limit the marker
to a safe operating speed. Excessive folding speeds
can cause marker damage.
!
CAUTION!
Excessive folding speeds can cause marker damage!
!
WARNING!
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
The markers cycle in the following sequence
(1) Right Up, Left Up
(2) Right Down, Left Up
(3) Right Up, Left Up
(4) Right Up, Left Down
(5) Sequence Repeats
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 fit-
tings. To avoid possible danger of cracking hydraulic fit-
tings from over tightening, DO NOT use plastic sealant
tape.
Marker Transporting
Always transport the marker with it folded in the flat fold
position. Make sure the second marker section(s) rests
securely on the transport carrier(s).
Section 3
Operating Instructions