Shift pressure shift valve, function - GF27.60-P-5136-04G

Transmission 722.6 

1-2/4-5 shift pressure shift valve 

Multiple-disc brake (B) engaging, multiple-disc clutch (K) disengaging 

Fig 1: Identifying Shift Pressure Shift Valve Function

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

1-2/4-5 shift pressure shift valve 

Multiple-disc brake (B) engaging, multiple-disc clutch (K) disengaging 

Fig 2: Identifying Shift Pressure Shift Valve Function

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Operation 

When the multiple-disc brake (B) is engaged, the working pressure (p-A) is applied to the end face of the shift pressure shift valve (29) via the command valve (31). Its shift condition is retained in the shift phase, whilst the shift element pressure acting on the end face and which is variable during the shift phase is replaced by a corresponding, constant pressure.

When the multiple-disc clutch (K) is engaged (K) the end face of the shift pressure shift valve (29) is depressurized during the stationary and shift phases, here the shift condition is also retained during the shift phase.