Great Plains ADI334 Operator Manual - Manual (Page 15)

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Section 1 Preparation and Setup
5/11/05 Models ADI334 and ADI345 Air Drill Implement 160-195M
Great Plains Mfg., Inc.
Figure 1-5
Center Hydraulic Cylinders
4. With the tractor engine at an idle speed, engage the
remote lever for the lifting circuit. When the outside
cylinders on both sides of the implement have com-
pletely extended, hold the remote lever on for one
minute.
5. Retract the cylinder rods. Extend the rods again and
hold the remote lever on for one more minute. Repeat
this step two more times to completely bleed the sys-
tem.
6. Recheck the tractor reservoir and fill to the proper level.
Bleeding the Fold System
!
WARNING!
Escaping fluid under pressure can have sufficient pressure to
penetrate the skin causing serious injury. Avoid the hazard by
relieving pressure before disconnecting hydraulic lines. Use a
piece of paper or cardboard, NOT BODY PARTS, to check for
leaks. Wear protective gloves and safety glasses or goggles
when working with hydraulic systems. If an accident occurs, see
a doctor immediately. Any fluid injected into the skin must be
surgically removed within a few hours or gangrene will result.
IMPORTANT: The cylinders located directly behind
the cart will not pivot upward for bleeding. Unpin and
remove these cylinders from the implement, then
support rod-end port higher than the base-end port.
Refer to Figure 1-5.
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1. Check the hydraulic fluid in the tractor reservoir and fill
to the proper level. Add fluid to the system as needed.
A low oil level may draw air back into the system, caus-
ing jerky or uneven cylinder movement.
2. Unpin the rod end of the fold cylinders. Wire or other-
wise safely support the cylinders so when the rod is
fully extended it does not contact anything. See Figure
1-6.
3. Cycle the cylinders completely in and out at least
three times to purge the air from the fold system.
NOTE: On the 45-foot implement, if the fold cylinders on
one side of the drill will not move after the other side has
completely extended or retracted, release the remote le-
ver momentarily, reverse the lever, then try again.
4. Fully extend the cylinders and repin the rod ends.
!
CAUTION!
Do not fold implement unless gauge-wheel transport locks are
installed.
5. Recheck the tractor reservoir and fill to the proper level.
Figure 1-6
Bleeding Fold Cylinders
14446