Great Plains ADC1150 Operator Manual - Manual (Page 26)

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Section 2 Implement Assembly and Setup
Model 1150 1995 - 1997 167-058M 7/28/10
Great Plains Mfg., Inc.
IMPORTANT: When the lift cylinder hoses are installed
carefully check them to be sure they are not rubbing on
any sharp edges. Check that the hoses are loose enough
to allow the implement to fold or unfold and raise or lower
without damage. Be sure that hoses will not bind or get
pinched during operation. If hoses are in a position where
they might get damaged change their route until they are
safe.
Bleeding the Hydraulic Lifting System
The implement lifting system is equipped with rephasing
type hydraulic cylinders that require a special procedure for
bleeding air from the hydraulic circuits. Read and follow the
procedure carefully. The rephasing type cylinders will not
function properly with air in the hydraulic circuit. This will
cause uneven seeding depth across the implement.
1. Jack up and support the front member of each imple-
ment frame section at a point close to each gauge
wheel.
2. With the frame blocked and supported, unpin the rod
end of the gauge wheel cylinders. Pivot the cylinders
up and wire; or otherwise safely support the rod end
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Hydraulic Hose Clips
Figure 2-5
NOTE: Check the hydraulic fluid in the tractor reser-
voir and fill to the proper level. Add fluid to the system
as needed. A low reservoir level may draw air back
into the system, causing jerky or uneven cylinder
movement.
port higher than the base end port.
3. With the tractor engine at an idle speed, hold the re-
mote lever on to put fluid into the lifting circuit. When
the outboard cylinders on both sides of the implement
have completely extended, hold the remote lever on
for one minute.
4. 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. If the gauge wheel leveling adjustments are to be
made, leave the cylinders unpinned and the imple-
ment frame supported.
5. Recheck the tractor reservoir and fill to the proper level.
Fold Cylinders
!
DANGER!
The folding cylinders must be bled free of air before attempting
to fold implement, otherwise severe damage and bodily injury
may result. Refer to Figure 2-7:
34’ and 45’ Drills
Position main fold cylinders with base end toward center of
the drill, rod end toward wings. Pin the base end to the fold
cylinder lug. Secure the pin with the provided clip, refer to
Figure 2-7. Leave rod end unhooked and block up in the
air so that the rod will not come in contact with anything
when extended. Do not connect rod end until after air is
bled from fold circuit.
NOTE: The cylinders located directly behind the cart
will not pivot upward for bleeding, and must be un-
pinned at both ends and then supported with the rod
end port higher than the base end port. Refer to Fig-
ure 2-6.
Center Hydraulic Cylinders
Figure 2-6
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