Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1996 1996 Tech Service Bulletin 04-09-0130476

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ATTENTION:
GENERAL MANAGER J           PARTS MANAGER J
CLAIMS PERSONNEL J          SERVICE MANAGER J
IMPORTANT - All Service Personnel Should Read and Initial



                                                            SERVICE BULLETIN

 APPLICABILITY:                            1995~2000MY Legacy Vehicles                                  NUMBER:             04-09-01
      SUBJECT:                             Steering Knocking/Rattle Noise                                 DATE:             08/15/01
                                           When Turning

If you should encounter a knocking or rattle noise from the vehicle steering system please use the
procedures below to diagnose and reduce or eliminate the noise. The noise is usually heard when
turning and going over a bump in the road such as when turning into a driveway. Please keep in
mind that while the noise sounds the same, the cause (and ultimately the repair performed) is
different between 1995-99MY Legacy and 2000MY Legacy.


EXPLANATION OF MECHANISM AND CAUSE

The power steering assist is created using hydraulic pressure. This pressure is generated by the
pump and then distributed through valving on the steering rack, to the appropriate side of the
rack. There is always pressure on both sides of the rack, in order to provide quick steering
reaction and a positive feel.

When the steering input is negative, that is, straight driving, the fluid is basically just circulated
for lubrication, while maintaining equal pressure. When the steering wheel is turned, hydraulic
pressure is greater on the input side, while some residual pressure is maintained on the free side
of the rack.

When turning the steering wheel, even slightly, on rough roads, or especially when entering a
driveway over a curb, the tires will input a reactive force through the rack, caused by the impact.
This causes the hydraulic pressure in the input lines to force back against the residual pressure in
the free side lines. When the higher pressure hits the lower pressure, knocking noise is gener-
ated.




                             C A U T I O N: VEHICLE SERVICING PERFORMED BY UNTRAINED PERSONS COULD
                                     RESULT IN SERIOUS INJURY TO THOSE PERSONS OR TO OTHERS.

                     Subaru Service Bulletins are intended for use by professional technicians ONLY. They are written to inform those
                     technicians of conditions that may occur in some vehicles, or to provide information that could assist in the proper
                     servicing of the vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to
                     do the job correctly and safely. If a condition is described, DO NOT assume that this Service Bulletin applies to your
                     vehicle, or that your vehicle will have that condition.
Number: 04-09-01; Date 08/15/2001                                                                    Page 2


While some customers may object to this noise, it does not harm the steering system or any of its com-
ponents. This noise can be reduced or eliminated by following the procedures below.


REPAIR PROCEDURE

1995~1999 Model Years
      If you should encounter the condition on a 95-99MY it will be necessary to install a Steering
      Universal Joint With Damper. The Steering Universal Joint with damper are available in two
      lengths:

               Legacy Models         Part Number 34160AC030         (Shorter Length)
               Outback Models        Part Number 34160AC090         (Longer Length)

       These parts are available through your normal parts channel. Always check the part number
       suppression for any changes.

       After installing the new Steering Universal Joint with damper using the procedures in the
       appropriate service manual, it will be necessary to drive the vehicle to confirm the correction.

2000 Model Years
      If you should encounter the condition on a 2000 MY, it will be necessary to install a set of
      Modified Power Steering Lines.

               Modified Power Steering Lines         Part Number 34190AE120

       This kit is available through you normal parts channel. Always check the part number
       suppression for any changes.

       After installing the Modified Power Steering Lines using the procedures in the appropriate
       service manual. It will be necessary to drive the vehicle to confirm the correction.


WARRANTY INFORMATION/CLAIMS

For vehicles within the warranty period, these repairs can be claimed using the following warranty
information.


               Year           Component         Fail Code      Operation Code       Time
             1995-99         Steering Shaft      RAD-48           A658-301         0.3 Hrs.
                            Lower Universal

               2000         Modified Power       RAV-48           A657-008         2.3 Hrs.
                           Steering Hose Kit

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