Shift Valve, Component Description - GF27.60-D-5141HB
Transmission 722.6 in MODEL 906.111/113/131/133/135/153/155/211/213/231/233/235/253/255/611/613/631/633/635/637/653/655/657/711/713/731/733/735
Shift pressure shift valve
Location
A shift pressure shift valve belongs to each shift group. The shift pressure shift valve 1-2/4-5 and the 2-3 shift pressure shift valve are installed in the shift plate valve housing. The 3-4 shift pressure shift valve is installed in the shift plate valve housing.
Task
Each shift pressure shift valve assigns the corresponding shift pressure to an engaging actuator. Simultaneously the overlap pressure regulated by the overlap pressure regulating valve is assigned to the actuator to be disengaged.
Shown: 1-2/4-5 shift pressure shift valve
Multidisk brake engaging, multidisk clutch disengaging
Shown: 1-2/4-5 shift pressure shift valve
Multidisk brake disengaging, multidisk clutch engaging
Function
Working pressure is applied to the shift pressure shift valve on the end face via the command valve. Its shift condition is retained in the shift phase, meanwhile the variable shift pressure acting on the end face during the shift phase is replaced by a corresponding constant pressure.
When the multidisk clutch is engaged the end face of the shift pressure shift valve is unpressurized during the steady-state and shift phase, the shift condition also being retained here during the shift phase.