Specifications

MORRIS Industries Ltd.
5-17
Operation
Transport Hydraulics
The transport hydraulic system is controlled by a
parallel hydraulic system. A sequence valve and
counter balance valve are used to control the order
in which the hydraulic cylinders are activated.
The valves are located on the main frame with the
sequence valve mounted on top of the counter
balance valve. The counter balance valve is preset
at 3000 psi with a pilot pressure of 1000 psi. The
sequence valve is preset at 2400 psi.
Note: The sequence valve may have to be
adjusted depending on individual tractor
characteristics. The counter balance
valve should not be adjusted.
The function of both the sequence valve and counter
balance valve are critical, during the unfolding
procedure, without these valves the transport wheel
cylinders will retract as soon as the tractor lever is
moved in the unfolding direction, causing damage
to the main frame packer assembly.
Note: On the 55 and 60 foot model, a pressure
compensated flow control valve (FCV)
manifold is integrated in the circuit to
synchronize the raising and lowering of
the wings.
To unfold the Maxim Air Drill, the sequence valve
prevents hydraulic fluid from flowing to the transport
wheel cylinders, forcing the fluid to the wing lift
cylinders causing the wings to unfold first.
Once the wing lift cylinders are fully extended the
pressure in the circuit builds to the point that the
sequence valve opens, causing the pilot line to the
counter balance valve to pressurize opening the
counter balance valve. With both valves open the
hydraulic fluid retracts the transport wheels up into
field position.
During the folding procedure, hydraulic fluid free
flows through both valves. First, hydraulic fluid
extends the transport wheel cylinders lifting the main
frame packers off the ground. Once the transport
wheel cylinders are fully extended, the wing lift
cylinders retract folding the wings. As the weight of
the wings transfer onto the main frame, the counter
balance valve prevents the transport wheels from
retracting.
OR PACKER GANG PIVOTS.
TO MAIN PACKER FRAME AND/
RESULT IN SEVERE DAMAGE
FAILURE TO DO SO COULD
AND WHEN TRANSPORTING.
FOLDING UNIT UP OR DOWN
LOCKED IN PLACE BEFORE
TRANSPORT WHEELS MUST BE
S22441
CAUTION
ADJUSTMENT
COUNTER BALANCE VALVE
SEQUENCE VALVE