Great Plains AS20 Operator Manual - Manual (Page 16)

AS15 and AS20 Planting System 148-153M 4/14/05 14 Great Plains Mfg., Inc.
Section 3 Basic Operation
Transporting
Transport Locks
The All Seeds Hitch has two transport lock blocks which
are controlled by a spring loaded handle located on the
left end panel of the transport frame. The handle can be
moved from “Field” to “Road” position or “Road” to
“Field” position regardless of the position of transport
rockshaft or transport lock blocks. This allows the oper-
ator to rotate the transport lock handle to the desired
position and then operate the hydraulics to allow the
transport locks to “lock in” or “lock out” automatically.
To lock the All Seeds Hitch for transport, pull the trans-
port lock handle outward and rotate the handle
counterclockwise to the “Road” position and hook the
handle back over the receiver tab, Figure 3-1. Then, lift
the machine completely until the transport lock blocks
snap into position against the rockshaft lugs. Once the
transport lock blocks are in position, the hydraulics can
be activated to set the machine down against the blocks
and relieve the pressure on the cylinders.
Locking the machine for transport is essential to prevent
damage to the hitch or operator should hydraulic failure
occur during transport or when working around the ma-
chine in the raised position. To lower the All Seeds Hitch
for planting or storage, reposition the transport lock han-
dle clockwise to the “Field” position as shown in Figure
3-2. The machine must then be completely raised to al-
low the transport lock blocks to slide free before the
machine can be lowered.
Pivot Lock Tubes
The adjustable pivot lock tubes, located on the front of
the transport frame and next to the leaf spring rollers, re-
strict the pivot movement between the transport frame
and the coulter hitch to allow for safer transport. They
can be adjusted by loosening the jam nut and screwing
the bolt in or out to the desired setting and retightening
the jam nut. When the transport frame is 90 degrees to
the tongue, each bolt head should be about 1/16" away
from its stop pad on the pivot hitch.
The pivot lock tubes are controlled automatically by
spring loaded links connected to the rockshaft. When
the All Seeds Hitch is completely raised, the pivot lock
tubes rotate down and contact the stop pads on the pivot
hitch to restrict pivoting during transport and when turn-
ing at the end of the field. When the All Seeds Hitch is
lowered, the pivot lock tubes rotate up and allow the
hitch and frame to pivot freely in the field.
The pivot lock tubes can be manually locked down or
locked up by swinging the lock tube (down/up) and in-
serting the 3/4" X 5 1/4" long hitch pin to hold it in place
as shown in Figure 3-3. The 3/4" hitch pin is normally
stored in the storage hole just behind the pivot lock
tubes.
Transport Lock Handle in Transport "Road" Position
Figure 3-1
12332
Transport Lock Handle in "Field" Position
Figure 3-2
12330
Section 3
Basic Operation