OMA88864

24 Row Markers

IMPORTANT: Before performing any of these checks, verify hydraulic SCVs are set to maximum flow, frame control console has power (backlight is on), cleanout switch is set to “Plant” position, and the proper buttons are pushed for the desired function .

Symptom	Problem	Solution
Marker floats off ground.	Machine not down.	Machine must be fully lowered for proper marker operation.
	Leaking tractor SCV.	Repair valve or connections.

Markers not alternating in automatic mode.

Marker alternating switch on inner right-hand wing wheel module out of adjustment.

Add an additional washer on top of spring loaded pin.

Left marker lowers when not selected.

Valve Y3L stuck open.

Check for 12 volts at solenoid.

Check solenoid

Right marker lowers when not selected.

Valve Y3R stuck open.

Check for 12 volts at solenoid.

Check solenoid

Left marker will not lower.	No power to control box.	Check seven pin connector. Check inline fuses.
	Valve Y3L not energized.	Check for 12 volts at solenoid. Check solenoid.
	Valve Y3L is stuck closed.	Clean or replace valve.
	Check position of switches on frame control box.	Activate correct switches.
	Winglet not lowered.	Lower winglet first.

Right marker will not lower.	No power to control box.	Check seven pin connector. Check inline fuses.
	Valve Y3R not energized.	Check for 12 volts at solenoid. Check solenoid.
	Valve Y3R is stuck closed.	Clean or replace valve.
	Check position of switches on frame control box.	Activate correct switches.
	Winglet not lowered.	Lower winglet first.

Marker operating too fast.	Verify there is an orifice fitting in both the rod end and piston end of the cylinder.	Install orifice fitting.
	Air in hydraulic system.	Disconnect cylinder and cycle cylinder to eliminate air.

Shear bolt shears too often.	Marker disk angle too aggressive.	Reduce angle of marker disk blade.
	Incorrect marker breakaway bolt adjustment.	Adjust marker breakaway bolt exactly as described in REPLACE 24 ROW MARKER BREAKAWAY BOLT- in Service section.
	Incorrect marker shear bolt or marker shear bolt too short.	Replace marker shear bolt with correct M8 x 1.25 x 55 mm Grade 8.8 bolt.

Cannot see marker mark in field.

Marker disk angle not aggressive enough.

Increase angle of marker disk blade.

OUO6074,0000E79-19-20090515