AG SHIELD LandRoller, Operator’S Handbook And Parts Manual

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9. PowerFold option
instructions
The PowerFold option allows you to park the
LandRoller on one spot and move the wings to field
position. It works by building up to a preset pressure in
the cylinders holding the tire against the drive spindle,
before oil flow is delivered to the hydraulic motors.
The face of the tire should be reasonably dry and
clean before operating the PowerFold. If the tire were
recently pulled through a sticky clay mud hole before
folding is attempted, extra care will be required to see
that the wheels are turning across the field within 2
seconds of the time that the lever is engaged.
OPERATOR ALERT
- Depending upon
your tractor system pressure, and sequence valve
adjustments, it is possible to damage a tire by holding
the lever to move the wings to field position after the
wings have contacted the fold stops. That is
the motor
might continue to turn the drive spindle, the wheel
is unable to rotate forward, and the spindle will
over heat the tire, and chew the tire rubber away.
When installed the PowerFold comes from the factory
with the sequence valves preset to 2500 psi on each
side. That may need to be adjusted to a lower setting if
the tractor cannot create 200 psi more than 2500 psi.
When folding to the field position, observe if one side
normally reaches the fold stop on center frame ahead
of the other. To synchronize the speed the 2 sides,
increase the pressure setting on the faster side by
screwing the adjust thread into the cavity 1/12 turn CW
or “into” the cavity. The pressure gauge do not have to
have the same pressure, the gauges can read slightly
different when receiving the same pressure. Use the
gauges as an approximate Use the gauge as an
approximate pressure reading.
The retrofit PowerFold option comes from the factory
with both sequence valve set too low to operate.
After the installation is complete, have a co worker
operate cab lever, while a second person adjusts the
pressures to 2500 psi on each side. The set pressure
determines the amount of rotating cylinder pressure
that is applied before the hydraulic motor starts to turn.
If that setting is too low compared to the maximum
system pressure of the system, then the drive spindle
may continue turning when the tire is not rotating,
causing damage to the tire.
If you do not have coworker present to observe the
spindle versus tire operation
DO NOT begin randomly
adjusting the pressures, tire damage may result.
Contact factory before making adjustment to get
further understanding of the system, and how it
operates.
Field installation
The LandRoller is shipped PowerFold ready, that is
the hoses to the rear wheel cylinders are ½” hoses
capable of handling the higher flows needed to
operate the 2 hydraulic motors, The motors are each
able to use 8-12 gpm, so the tractor circuit should be
adjusted wide open for most models of tractor. The
hydraulic motor operation preferred circuit will be the
best choice for this operation.
The unit will be preassembled subunits for each side,
and the correct unit for left side will be marked “left” on
the motor, the correct unit for right side will be marked
“right” on the motor.
1) Remove the transport locks to allow the rollers
to be lowered to the ground, lower the roller,
and raise the outer transport wheel up PART
WAY so that the tire is resting lightly on the
ground, or on a stand to allow easy work ion
the tire caster assembly.
2) Remove the tire from the hub to make easier
access, and easier lifting of parts.
3) Remove the cylinder clevis pins from rod end of
cylinder.
4) Loosen the bolt securing the cylinder clevis to
the cylinder rod, unscrew the steel cylinder
clevis, it is not used in the PowerFold system.
5) Screw on the new cast cylinder clevis provided
until the end of cylinder shaft is flush with the
inside of clevis. Tighten the lock bolt to
maximum recommended for that bolt.
6) Remove the vertical castor pin
–part # 800412
through the caster assembly. It is too short to
be used in a PowerFold system .
7) Place the drive wheel weldment into position,
loosely install the ½ x 1 ½ bolts into wheel
frame.
8) Install the rotating castor pin 800417 through
the caster, and new drive wheel weldment #
800525.
9) When assembled, move control lever to
shorten cylinder, observe 2 THINGS:
A) THAT THE CYLINDER SHAFT DOES NOT
SHORTEN COMPLETE, THAT IS THAT THERE IS
STILL .25 INCHES OF CYLINDER STROKE
REMAINING UNUSED WHEN THE FULL
PRESSURE OF 2050 PSI IS APPLIED- SCREW
THE CLEVIS
ON AS NEEDED TO ACHIEVE THIS
SETTING