Component Description For Oil Pump - GF27.57-D-1010HAG
TRANSMISSION 722.9 in MODEL 906
View of automatic transmission from front left (with code (MJ7) ECO start)
Location
The oil pump (6) is installed in the transmission bell housing behind the torque converter, and it is driven by the drive flange of the torque converter.
Task
The oil pump (6) generates the oil pressure necessary for the hydraulic processes.
Design
An external gear (6a) supported on bearings eccentrically in the pump housing is located on the internal gear (6b) connected to the drive flange. The crescent (6c) drives the external gear (6a).
Function
When the engine is running oil is delivered through the suction gallery (6e) along the top and bottom side of the crescent (6c) to the pressure chamber (6d) of the housing. The meshing of the teeth prevents oil from flowing from the pressure side to the suction side.