Coupling the hydraulic hose lines

All hydraulic hoses are equipped with handles. The handles have colour markings with a code number or a code letter. The markings are assigned to the respective hydraulic functions of the pressure line of a tractor control unit. Stickers are applied on the implement for the markings, which illustrate the respective hydraulic functions.

The tractor control unit is used with different types of actuation, depending on the hydraulic function:


Type of actuation	Function	Symbol
Latching	Permanent oil circulation
Momentary	Oil circulation until action is executed
Floating	Free oil flow in the tractor control unit


Designation	Function			Tractor control unit
Red	Pressure-free return flow. The pressure-free return flow must always be coupled!			Maximum line pressure less than 5bar
		Fan for singling unit	Switching on and off	With on-board hydraulic system, single-acting
	Return flow line			Without on-board hydraulic system, double-acting
		Fan for Central Seed Supply and fertiliser	Switching on and off	Without on-board hydraulic system, double-acting
	Return flow line			Without on-board hydraulic system, double-acting
	Leakage oil line. The leakage oil line must always be coupled!			Maximum line pressure less than 2bar
Green		Pre-selection on the control terminal: Folding the implement	Fold	Double-acting
			Unfold	Double-acting
		Pre-selection on the control terminal: Loading board	Unfold	Double-acting
		Pre-selection on the control terminal: Loading board	Fold	Double-acting
		Pre-selection on the control terminal: Telescopic axle	Extend	Double-acting
		Pre-selection on the control terminal: Telescopic axle	Retract	Double-acting
		Pre-selection on the control terminal: Wheel mark eradicator	Lowering	Double-acting
			Lifting	Double-acting
Blue		Jack	Extend	Single-acting

IMPORTANT

Implement damage due to insufficient hydraulic oil return flow

On the tractor side, only use lines that correspond to the nominal width of red T of the implement or larger for the pressureless hydraulic oil return flow.

Select short return paths.

Connect the pressureless hydraulic oil return flow to the intended coupling before all of the other hydraulic connections.

If the implement has a leakage oil line:

couple the leakage oil line in the intended coupling.

Install the supplied coupling sleeve on the pressureless hydraulic oil return.

Depressurise the hydraulic system between the tractor and the implement using the tractor control unit.
Clean the hydraulic plugs.
First couple the red T hydraulic hose line with the corresponding hydraulic socket on the tractor.
Couple the red 1 hydraulic hose line with the corresponding hydraulic socket on the tractor.
Couple the remaining hydraulic hose lines 1 to the hydraulic sockets on the tractor according to the marking 2.

The hydraulic plugs lock perceptibly.

Route the hydraulic hose lines with sufficient freedom of movement and without chafing points.