Oil Pump Component Description - GF27.57-D-1010H
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
Location
The oil pump (crescent-type pump) is installed behind the torque converter in the torque converter housing and is driven via the drive flange of the torque converter.
Task
To produce the necessary oil pressure for the hydraulic sequences.
Design
An external gear supported excentrically on bearings in the pump housing is located on the internal gear connected to the drive flange. The crescent guides the external gear.
Function
When the engine is running, oil is delivered through the suction gallery along the top and bottom side of the crescent to the pressure chamber of the housing. The meshing of the teeth prevents oil from flowing from the pressure side to the suction side.