GF27.57-P-1010ACM Component Description For the Oil Pump

GF27.57-P-1010ACM Component description for the oil pump
- TRANSMISSION 722.643/649
- refinement package
- as of model year 09

Component Identification:

Location
The oil pump is installed in the torque converter housing behind the torque converter and is driven via the drive flange of the torque converter.

Task
The oil pump produces the necessary oil pressure for the hydraulic sequences.

Design
An external gear supported eccentrically 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.