Subaru Impreza 2002 Service Manual page 61

Manual Transmission and Differential
7. Oil Pump
A: CONSTRUCTION
The lubricating oil pump incorporated in the transmission case is of a trochoid type.
The pump consists of an inner rotor having four teeth, outer rotor having five teeth, oil pump cover
and oil pump driven gear, which are all located at the rear of the transmission case.
The pump is driven by the drive gear located on the center differential, so the delivery rate varies
with the speed of the center differential.
There are a pressure regulator valve and pressure relief valve on the delivery side of the pump.
(1) Oil pump cover
(2) Oil pump driven gear
(3) Outer rotor
(4) Inner rotor
OIL PUMP
(5) Transmission case
(6) Pressure regulator valve
(7) Pressure relief valve
6MT-22
NF0617