Bosch SB7 Auxiliary Control Unit, Without Latching on A&B (AK Regeltechnik)

Offered here are new double-acting replacement control valves for the Bosch SB7 system.

They fit various tractors and manufacturers.

This is a 5/4-way valve, like the original valves from Bosch. It has the positions lift, neutral, lower, and float position.
The control valve can be switched between single-acting and double-acting using a grub screw on the back.
The control valve has a hydraulic end stop on connection A, which means that when the maximum pressure is reached, it unlocks and automatically returns to the neutral position. This corresponds to the function of the original SB7 control valves.

The Lift position (A) is not detented.

The Lower position (B) is not detented. If you continue switching past the lower position, the detented float position is activated, (consumer connections A and B connected together to return flow). The float position can be used as a detented lower position on both double-acting and single-acting lifting cylinders. 

The control valve is simply integrated into the existing system with longer studs.
The control valve has working ports at the bottom (as on the original) and at the top. The upper ports also make it suitable for use where there is limited space to the steering knuckle.

It fits various tractors from the following manufacturers (list may be incomplete):
IHC; Deutz; Fendt; Eicher; Schlüter; MB Trac; Güldner; Kramer; Lindner; Steyr; Porsche;

Technical data:
Max. operating pressure [bar]: 250
Max. return pressure [bar]: 50
Rated flow [l/min]: 60
Tightening torque [Nm]: 30
Overlap: positive
Connections [mm]: M18 x 1,5