Single Lever Control of Hitch And Double Acting Lift Assist Wheels-8000 Series Tractors
The planter should be equipped with no center mast. SCV I will be used to control both the tractor hitch and the lift assist wheels. The following conditions must be true:
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The lift assist cylinders (A) must be double-acting. If one were to attempt to set up a no-mast integral planter using single acting lift assist cylinders, the planter would not raise and lower level. This is because the tractor hitch carries about 70 percent of the planter weight. The front of the planter would always raise last and lower first, resulting in seed left on top of the ground.
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The planter must have no center mast. The frame is kept level in planting position by adjusting the closed length of the lift assist cylinders and/or adjusting the collars on the closing wheel vertical pivot.
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The Hitch Control Unit (HCU) (if tractor is so equipped) must be disabled when using single-lever control. A special 9-pin harness (B) containing a loop circuit that disables the 8000 Series Tractor Hitch Control Unit must be installed. The harness connects to a RE58827 9-pin kit (C) that is wired into the tractor main 7-Pin electrical harness (D). This harness loop is tie banded to the planter warning light harness to ensure that the tractor hitch will resume normal function when the planter is not connected.
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The planter drive wheels must be to the front of the planter frame.
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The rate of tractor hitch and lift assist raise and lower must be balanced (to keep the frame level) by adjusting back-to-back one-way flow control valves (E) (contained in BA26232).
Connect lift cylinder hoses (F) to SCV (G) and jumper hose to auxiliary hitch valve port (H).
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A-Lift Assist Cylinders
B-9-Pin Harness
C-9-Pin Kit
D-7-Pin Harness
E-Flow Control Valves
F-Lift Cylinder Hoses
G-SCV
H-Auxiliary Hitch Valve Port
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