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

Blue

Jack

Lifting

Double-acting

Lowering

Red

Continuous oil circulation

Single-acting

Red

Pressureless hydraulic oil return flow

Red

Load sensing control line

Adjust on the hydraulic block as needed

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. Clean the hydraulic connectors.
NOTE

If the hydraulic hose lines are incorrectly connected, the hydraulic functions may be faulty.

  1. Close the stop tap 1.

  2. To depressurise the red T oil return flow:

    Open stop tap 2 for 3 seconds. Then close it again.
  3. Connect the red T oil return flow to the hydraulic socket on the tractor.
  4. Open the stop tap 1.

  5. Couple the red P pressure line.

  6. When the load sensing system is used:

    Couple the red LS load sensing control line.
  1. Couple the other hydraulic hose lines 1 to the hydraulic sockets of 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.