Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 2000-2003 Approved Subaru Legacy 2000 2000 Service Manual MECHANISM AND FUNCTION SECTION Automatic Transmission and Differential MSA5TCD00L18188

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                         LEGACY (W2260BE_SGML Complete)



3-2      [M1A0]                  MECHANISM AND FUNCTION
1. Oil Pump


1. Oil Pump
A: CONSTRUCTION
The trochoid pump is housed in the oil pump housing. It consists of a inner rotor (9 teeth), outer
rotor (10 teeth) and oil pump cover.




                                                                                           B3H0888A



  (1) Oil pump housing                (4) Gasket                      (7) Oil pump cover
  (2) Hose                            (5) Inner rotor                 (8) Seal ring
  (3) Nipple                          (6) Outer rotor                 (9) Thrust bearing


B: FUNCTION
D The automatic transmission fluid (ATF) is drawn through the oil strainer mounted under the con-
trol valve ASSY, and is routed to the transmission case, to the oil pump housing, and to the oil pump
cover. It then goes to the suction port.
D As the inner rotor rotates, the outer rotor also rotates. This motion causes ATF to be sucked up
through the suction port and discharged under pressure from the discharged port.
D The discharged ATF flows from the oil pump cover to the oil pump housing. It then goes to the
transmission case, the control valve and to the regulator valve, thus serving as hydraulic oil and
lubricating oil for the torque converter clutch, valves, clutch.
D As engine speed increases, the delivery rate of the trochoid pump also increases.




                                                        2
          LEGACY (W2260BE_SGML Complete)



                                MECHANISM AND FUNCTION                 [M1B0]     3-2
                                                                          1. Oil Pump




                                                                            B3H0889A



(1) To torque converter regulator valve         (8) Oil pump housing
(2) To manual valve                             (9) Outer rotor
(3) From reverse clutch                        (10) Inner rotor
(4) From pressure modifier pressure            (11) Suction port
(5) Pressure regulator valve                   (12) Oil strainer
(6) To manual valve                            (13) Oil pan
(7) Delivery port                              (14) Line pressure




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