Amity Technology 2010, Homeowner'S Operating Instructions

Page: 15 / 75

Lift Assist Rear Hitch Continued
The rear lift assist system utilizes a hydraulic
control valve and a hydraulic accumulator to:
•
Maintain constant pressure on the rear lift
assist cylinders when transporting the
Single Disc Drill.
•
Minimize pressure for reduced weight
transfer while seeding in the field.
Pressure gauge rear lift assist
The rear lift assist system is pressurized as the wings are folded. The rear lift assist lockout valve
must be open for the system to be pressurized.
Ensure that the main lift system is in transport
height before pressurizing the rear lift assist . After the wings are folded, check the rear lift
assist pressure gauge to ensure proper transport pressure is in the Green area on gauge and
subsequently close the lockout valve to isolate the system from the tractor. If proper pressure is
not met, the wings can be unfolded and folded again in order to achieve proper transport
pressure.
The transport system is de-pressurized automatically when the wings are unfolded all the way.
The rear lift assist lockout valve must be open for the system to be de-pressurized. If the
pressure is not released from the system from un-folding the wings, hold the hydraulic remote in
the lower position to fully extend the wing cylinders until the rear lift-assist pressure drops to
zero.
The rear lift-assist system must be de-pressurized and the lockup valve must be open
before the SDD can be used for seeding , this allows the rear transport wheels to float over the
field. The down pressure control circuit while seeding allows the rear transport wheels to float as
the SDD is used on various terrains.
The rear lift-assist pressure gauge is marked with an optimum range that the pressure should be
within for seeding. If the pressure is ever above the seeding range, check to ensure the rear lift-
assist lockout valve is open. Also verify that the hydraulic flow for the toolbar down pressure
function is below 5 GPM as the backpressure will affect the rear assist pressure while seeding.
The lift-assist pressure can be relieved by extending the wing cylinders all the way and holding
them out until the pressure drops within the seeding range.
If it is desired to put the toolbars in “Float” while seeding in very light soil conditions, the rear
lift-assist needs to be put into float mode. This mode is activated by first activating the toolbar
tractor remote to at least 500 psi down pressure for 5 seconds then by putting the toolbar tractor
remote directly into float. This mode is deactivated automatically whenever the wings are folded
or if the toolbars are raised to transport position.
The rear lift-assist control valve is calibrated at the factory and does not require adjustments.
11