Great Plains AS20 Operator Manual - Manual (Page 13)

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11 4/14/05 Great Plains Mfg., Inc.
Section 2 Assembly Instructions & Set-Up
AS15 and AS20 Planting System 148-153M
1. Make sure the transport lock handle is in the “Road”
position, and that the transport lock blocks are down
in their transport position. The all seeds hitch is nor-
mally shipped this way. If not, lift up and support the
hitch transport frame so the cylinders can be un-
pinned.
2. Unpin the rod end clevis pins. The cylinder rod
should be completely extended at this time. If not,
manually extend the cylinder rods. With the cylinder
rods completely extended, loosen the connection
between the hose end and the tee at the rod end of
the transport lift cylinder. Slowly work the remote le-
ver to feed oil to the cylinder rod ends, stopping
when oil is seen coming from around the fitting. Re-
tighten the rod end hose fitting.(Do not attempt to re-
tract the cylinder rods while bleeding the air from the
cylinder rod ends to minimize the air space at rod
ends of the cylinders.)
3. Once the rod end hose fitting has been retightened,
completely retract the cylinder rods. After the rods
are retracted, loosen the hose fitting to the hose run-
ning between the base end tee and the relief valve
which is connected to the rod end of the same cylin-
der. Loosen the hose fitting on the end which con-
nects to the base end tee. Slowly work the remote
lever to feed oil to base ends of the cylinders, stop-
ping when oil is seen coming from around the fitting.
Once the air is expelled, retighten the base end
hose fitting. (Do not attempt to extend the cylinder
rods while bleeding the air from the cylinder base
ends to minimize the air space at the base ends of
the cylinders.)
4. Extend and retract the transport lift cylinders several
times. The majority of the air should now be expelled
from the lift system. The remaining air will gradually
be pushed to the tractor during day-to-day opera-
tions.
5. Repin the transport lift cylinders and move the trans-
port lock lever to the “Field” position. Raise and low-
er the hitch several times to check for proper
operation. The hitch will first have to be completely
raised for the transport locks to snap out of their
locked position.
6. Recheck the tractor hydraulic reservoir level and
add clean fluid as necessary.
NOTE: The hydraulic lift cylinders are not the
rephasing type cylinders. Bleeding these cylinders
require a special procedure which involves loosen-
ing hose connections at the cylinder fittings. Bleed
the circuit at a JIC Connection or Pipe connection.
Do not attempt to bleed an o-ring connection, as o-
ring damage may occur.
Drill and Planter Hookup
The All Seed Hitch is a complete planting system de-
signed to accommodate all your planting needs. It
comes complete with all the hardware to turn your Great
Plains drill and Great Plains planter into a no-till planting
system capable of handling a range of planting condi-
tions from tough no-till to conventional tillage planting.
The All Seeds Hitch allows you to quickly change from
no-till planting to no-till drilling. The following section ex-
plains the procedure for drill and planter hookup.
Top Hitch Extension Assembly
Place the top hitch extension (#1) between the top hitch
plates of your drill or planter and bolt in place as shown
in Figure 2-5, using two 1" X 5 1/2" long bolts (#2), lock-
washers (#3), and hex nuts (#4). The All Seeds Hitch
comes with two top hitch extensions and hardware for
both a drill and a planter.
Lower Hitch Links
Great Plains 10 Series Drills with parallel linkage open-
ers require the use of special lower hitch links to
maintain a more level coulter and drill arrangement in
the field as well as allow greater transport clearance on
the road. The lower hitch links bolt to the lower hitch
plates of the 3-Point 10 Series Drill with two 1 1/8" x
2 1/2" long bolts (#1), lockwashers (#2), and hex nuts
(#3) as shown in Figure 2-6. Two 5/8" X 2" long bolts
(#4), USS washers (#5), lockwashers (#6), and hex nuts
(#7) are also required and fasten through the top slotted
holes in the lower hitch plates.
Top Hitch Extension
Figure 2-5
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