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 machine 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

Fan hydraulic motor

Switching on and off

single-acting

Pressure relief through pressureless return flow.

Green

Coulter pressure

Seed rate increase

Exact following harrow pressure

Coulter lift

Increase

Double-acting

Reduce

Lowering

double-acting

Lifting

Yellow

Not required in combination with track marker.

Tramline marker

Lifting

Single-acting

Blue

Exact following harrow lift

Roller harrow lift

Roller harrow pressure

Lowering

Double-acting

Lifting

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.
  1. Depressurise the hydraulic system between the tractor and the machine using the tractor control unit.
  2. Depending on the equipment, lock the tractor control units mechanically or electrically.
  3. Clean the hydraulic connectors.
  4. First couple the red T hydraulic hose line with the corresponding hydraulic socket on the tractor.
  1. Couple the remaining hydraulic hose lines 1 to the hydraulic sockets on the tractor according to the marking 2.

The hydraulic connectors lock perceptibly.

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