OMA111137

Opener Downforce System (Tractor with Open-Center Hydraulics)


Downforce system does not function.	Hydraulic lock-up valve closed.	Open hydraulic lock-up valve.

Pressure gauge shows zero when openers are down.	Selective control valve (SCV) lever is in the float position.	Put SCV lever in neutral position.
	SCV lever is not held in the lower position long enough to charge downforce system.	When lowering openers, hold SCV lever in lower position long enough for the downforce system to reach preset pressure as shown on pressure gauge.

Openers do not maintain proper ground contact.	SCV lever is not held in the lower position long enough to charge downforce system.	When lowering openers, hold SCV lever in lower position long enough for the downforce system to reach preset pressure as shown on pressure gauge.
	Slow internal hydraulic leakage. (Normal with all hydraulic systems.)	Hold SCV lever in lower position long enough for the downforce system to reach preset pressure as shown on pressure gauge.
	More hydraulic pressure required.	Increase preset hydraulic pressure.

Pre-set pressure does not lower when turning valve knob counterclockwise.

Open center attachment traps oil in system until openers are raised.

Raise and lower openers to reset to lower pressure.

Pre-set pressure does not rise when turning valve knob clockwise.	No pressure to the adjusting valve.	Hold SCV I in lower position for a few seconds.
	Hose couplers not connected properly to tractor.	Ensure that hose couplers are connected to proper SCV and locked.

OUO6030,0000393-19-20170502