Great Plains ADI445 Operator Manual - Manual (Page 21)

19
Section 1 Assembly and Setup
5/11/05 Model 2250 Air Drill Implement 160-192M
Great Plains Mfg., Inc.
Bleeding the Folding System
!
DANGER!
The folding cylinders must be bled free of air and implement
should be hooked to cart and tractor before attempting to fold
implement, otherwise severe property damage and bodily dam-
age or death could result.
1. Unpin the rod end of the fold cylinders and block up,
wire, or otherwise safely support the cylinders so that
when extended the rod end will not contact any ob-
jects.
2. Cycle the cylinders completely in and out a minimum
of three times to purge all air from the fold system. In-
spect all hoses, cylinders, and fittings for hydraulic oil
leaks.
!
WARNING!
Serious injury or death could result from escaping high pressure
hydraulic fluid. Use paper or cardboard, NOT BODY PARTS, to
check for suspected leaks.
3. Fully extend the cylinders to repin the rod ends in their
respective slots.
!
CAUTION!
Never fold implement unless gauge wheel cylinder lock chan-
nels are installed.
4. Recheck the tractor hydraulic reservoir level and fill to
the proper level.
5. Slowly fold and unfold implement. Check for hydraulic
leaks. Be aware of any pinch points that might dam-
age or cause accelerated wear on hydraulic hoses.
Side to Side Frame Leveling
Equal seeding depth across the implement can only be
maintained if all frame sections are level. Leveling adjust-
ments should be done during initial setup of the imple-
NOTE: Check the hydraulic fluid level in the tractor
reservoir and fill to the proper level. Add fluid to the
system as needed. A low reservoir level may draw air
back into the system and cause jerky or uneven cyl-
inder movement. During initial cycling of new hydrau-
lic cylinders, approximately 9.5 gallons of oil will be
used to fill the new cylinders.
NOTE: If cylinders on left or right side will not extend,
release the tractor hydraulic lever momentarily, re-
verse the lever, and then try again. This switches the
sequence valve used to unfold one side at a time
ment. Periodic frame leveling should not be necessary.
You may, however, field check the levelness of the imple-
ment by laying a straight edge across the top of at least
two members of a frame section and measuring the dis-
tance from the bottom of the straight edge to the center of
the gauge wheel axle. By comparing this measurement to
the measurements taken from other frame sections and
gauge wheels, an indication of levelness can be obtained.
If leveling is necessary, follow the instructions listed.
Implement Frame Leveling
1.
The gauge wheel hydraulic circuit should be bled of air
and full of oil, see Bleeding the Hydraulic Lifting Sys-
tem, this section, page 16.
2. Hydraulically lower the entire implement frame. The
frame should then be jacked up and supported, see
Bleeding the Hydraulic Lifting System, this section,
page 16.
3. Retract the lift cylinders fully. Because the front dual
gauge wheels on the implement frames three and four
are non-adjustable, all adjustments will be made with
these as a reference. A reference measurement must
be taken by laying a straight edge across the top of at
least two tubes on the implement frame and take a ref-
erence measurement from the bottom of the straight
edge to the center of one dual gauge wheel axle, refer
to Figure 1-15.
4. Move the straight edge to the four castored gauge
wheels on sections one and six. Remove the cylinder
pins from the base ends of the hydraulic cylinders on
the castored gauge wheels. Block or support the
gauge wheels so that the measurement from the bot-
tom of the straight edge to the center of the gauge
wheel axle is the same as the reference measurement
taken on the dual gauge wheels on sections three and
four. Loosen the jam nuts on the eye-bolts that the
base of the cylinders were fastened to and screw the
eye-bolts in or out until they can be pinned to the base
end of the hydraulic cylinders. Secure the eye-bolts by
tightening the jam nuts, refer to Figure 1-16.
Frame Leveling Measurement
Figure 1-15
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