Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Forester 1999-2004 Approved Subaru Forester 1999-2000 MECHANICAL COMPONENTS SECTION Steering System MSA5T0125A27782

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MSA5T0125A27782


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                                       SERVICE PROCEDURE                                            [W4A2] 4-3
                                                                         4. Control Valve (Power Steering Gearbox)


4. Control Valve (Power Steering Gearbox)
A: CHECKING OIL LEAKING POINTS




                                                                                                          S4M0153A


(1) Power cylinder                     (3) Rack piston                           (5) Input shaft
(2) Cylinder                           (4) Rack axle                             (6) Valve housing

1. OIL LEAKING POINTS                                         2. OIL LEAK CHECK PROCEDURE AND
1) If leak point is other than a, b, c, or d, perform         REPLACEMENT PARTS
the 5th step in "OIL LEAK CHECK PROCEDURE                     NOTE:
AND REPLACEMENT PARTS" before dismounting                     Parts requiring replacement are described in the
gearbox from vehicle.  If                smallest unit of spare parts including damaged
gearbox is dismounted without confirming where                parts and spare parts damaged. In actual disas-
the leak is, it must be mounted again to locate the           sembly work, accidental damage as well as inevi-
leak point.                                                   table damage to some related parts must be taken
2) Even if the location of the leak can be easily             into account, and spare parts for them must also
found by observing the leaking condition, it is nec-
                                                              be prepared. However, it is essential to pinpoint the
essary to thoroughly remove the oil from the sus-
                                                              cause of trouble, and limit the number of replace-
pected portion and turn the steering wheel from
                                                              ment parts as much as possible.
lock to lock about 30 to 40 times with engine
running, then make comparison of the suspected                1) Leakage from "a"
portion between immediately after and several                 The oil seal is damaged. Replace valve assembly
hours after this operation.                                   with a new one.
3) Before starting oil leak repair work, be sure to           2) Leakage from "b"
clean the gearbox, hoses, pipes, and surrounding              The torsion bar O-ring is damaged. Replace valve
parts. After completing repair work, clean these              assembly with a new one.
areas again.                                                  3) Leakage from "c"
                                                              The oil seal is damaged. Replace valve assembly
                                                              or oil seal with a new one.
                                                              4) Leakage from "d"
                                                              The pipe is damaged. Replace the faulty pipe or
                                                              O-ring.
                                                              5) If leak is other than a, b, c, or d, and if oil is
                                                              leaking from the gearbox, move the right and left
                                                              boots toward tie-rod end side, respectively, with the
                                                              gearbox mounted to the vehicle, and remove oil
                                                              from the surrounding portions. Then, turn the steer-
                                                              ing wheel from lock to lock 30 to 40 times with the

                                                         25
4-3   [W4B0]                          SERVICE          PROCEDURE
4. Control Valve (Power Steering Gearbox)


engine running, then make comparison of the                 2) Carefully draw out input shaft and remove valve
leaked portion immediately after and several hours          assembly.
after this operation.
   (1) Leakage from "e"
   The cylinder seal is damaged. Replace rack
   bush with a new one.
   (2) Leakage from "f"
   There are two possible causes. Take the follow-
   ing step first. Remove the pipe assembly B from
   the valve housing, and close the circuit with ST.
ST 926420000 PLUG
   Turn the steering wheel from lock to lock 30 to
   40 times with the engine running, then make                                                    S4M0155B
   comparison of the leaked portion between
   immediately after and several hours after this              (1)   Valve ASSY
   operation.                                               3) Slide dust cover out.
CAUTION:



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