Great Plains EWNT7 1523Q-1630Q Operator Manual - Manual (Page 11)

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9 4/25/06 Great Plains Mfg., Inc.
Section 2 Assembly Instructions & Set-Up
EWNT7 and EWNT10 End Wheel No Till Drill 150-082M-A
4. Connect the hitch to the tractor using a pin of ade-
quate strength (minimum 1" diameter).
Refer to Figure 2-7:
5.
Unpin the tongue jack, and pin it on top of the
tongue.
Your drill comes equipped with a hitch safety chain. The
safety chain should be securely attached to the drill hitch
and the tractor drawbar whenever towing or planting.
Tractor Hydraulic Hook-Up
Route the lift hydraulic hoses along the tongue and
through the hose loop on the front of the tongue. Con-
nect the hoses to the tractor remote outlets.
!
CAUTION!
Escaping fluid under pressure can have sufficient force to pen-
etrate the skin. Check all hydraulic lines and hoses before ap-
plying 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 assistance
from a doctor that is familiar with this of injury. Foreign fluids
in the tissue must be surgically removed within a few hours or
gangrene will result.
10123
Hitch Height Adjustment
Figure 2-6
11833
Jack In Transport Position
Figure 2-7
NOTE: Make sure the hitch is securely bolted to the
drill tongue.
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 fol-
low the procedure carefully. The rephasing type cylin-
ders will not function properly with air in the hydraulic
circuit. Bleeding the system may have been done during
initial set up of the drill.
1. Jack up and support the front member of the drill at
a point close to each end wheel. If the end wheel cyl-
inders have previously been engaged, they may be
used to assist in raising the frame.
2. With the frame blocked and supported, unpin the
cylinders from the drill frame and turn the cylinders
upside down and wire or otherwise safely support
the rod end 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 cylinders have completely extended, hold the re-
mote lever on for one minute.
4. Retract the cylinders. Extend the cylinders again
and hold the remote lever on for one more minute.
Repeat this step two more times to completely bleed
the system.
5. Repin the cylinders to the drill frame, rod end to the
wheel arm. If air is trapped in either cylinder, the af-
fected cylinder will have a spongy, erratic movement
and the drill will not raise evenly. Refill the tractor hy-
draulic fluid reservoir to its proper level.
IMPORTANT: When using sealant on pipe threads the
friction between the threads is reduced; therefore, be
certain not to over tighten causing damage to the cylin-
der port or fitting.
NOTE: Check the hydraulic fluid in the tractor reser-
voir and fill to the proper level. Add fluid to the sys-
tem as needed. A low reservoir level may draw air
back into the system, causing jerky or uneven cylin-
der movements. The drill system capacity is approx-
imately 1 gallon.
NOTE: After the drill is raised, a slight settling will oc-
cur due to the action of the rephasing cylinders.