Command valve component description - GF27.60-P-5142G

TRANSMISSION 722.6 in MODEL 204.0, 216, 221 up to Model Year 8 

Fig 1: Identifying Command Valve Components Location

Courtesy of MERCEDES-BENZ USA

Location 

Each shift group has its own command valve. The command valve 1-2/4-5 and 2-3 command valve are installed in the valve housing of the shift plate. The 3-4 command valve is installed in the valve body of the shift plate.

Task 

The command valves switch the shift groups from the steady-state phase into the shift phase and back.

Shown: 1-2/4-5 command valve 

Stationary phase (multi-disk brake B1 engaged, multi-disk clutch K1 disengaged) 

Fig 2: Identifying Command Valve Function Diagram (Stationary Phase)

Courtesy of MERCEDES-BENZ USA

Shown: 1-2/4-5 command valve 

Switching phase (multi-disk brake B1 disengaged, multi-disk clutch K1 engaged) 

Fig 3: Identifying Command Valve Function Diagram (Switching Phase)

Courtesy of MERCEDES-BENZ USA

Function 

When the end face is unpressurized (stationary phase) the working pressure is routed to the shift element operated.

If shift valve pressure is applied to the end face of the command valve (switching phase), then the shift pressure is shifted through to the engaged element and the overlap pressure to the disengaged element.