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Can I strip and rebuild PAS Pump W124??

Discussion in 'Suspension, Steering & Brakes' started by Waft, Dec 22, 2012.

  1. Waft

    Waft Senior Member

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    Hello!!

    My PAS pump sounds "bearingy" while listening close up,and has begun getting heavy now.

    Also,I changed the fluid about 6 months ago and already it's black.I used normal ATF,Dexron 3.

    Can I strip and rebuild the pump??
    Is there a schematic someone could perhaps post,so I can see a full breakdown.
    Once I have torque settings,I'm more than capable of replacing components,O-Rings etc. In fact I'd quite enjoy an overhaul over Christmas in the workshop :D

    TIA

    Steve
     
  2. william28ho

    william28ho Active Member

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    Hi - you can get a good second hand pas pump from a scrapyard, saves a lot of time.

    I hope this has help
     
  3. television

    television Always remembered RIP

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    As the above post,,, there are no Mercedes instruction anywhere for this
     
  4. mikestrivens

    mikestrivens Senior Member

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    If I had the time, and knowledge, I'd be inclined to get a good 2nd hand one to put in and then dismantle the one that is on the way out. This way one would learn about the pump and whether it can be refurbished whilst still having one on the car that works. That way it doesn't matter if it can't be fixed and you still have the car on the road. If it can be fixed then you have a spare for later. I used to do this with Ford parts when I was a student - saved quite a lot of money in the long run and learnt a lot. When I have more time on my handss I'd do it again but the components have become a lot more complex nowadays.
     
  5. television

    television Always remembered RIP

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    So true Mike and that was the way I lived some time ago and a learning curve into the bargain :D:D
     
  6. Frontstep

    Frontstep Senior Member

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    I suggest a search on Youtube I have seen a few pump rebuilds of other makes and models.
    Access to pullers and or a press would seem a good move there is nothing complicated in them.
     
  7. grober

    grober Senior Member

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    Last edited: Dec 22, 2012
  8. Frontstep

    Frontstep Senior Member

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  9. kth286

    kth286 Senior Member

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    the pump is suprisingly easy and has few parts in the rebuild kit.

    was about £13 last time.

    BUT you need to research which pump you have as there are several
    versions.
     
  10. grober

    grober Senior Member

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    IRRC htere should be an identity plate on the pump somewhere which should help?
     
  11. kth286

    kth286 Senior Member

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    Yes.
     
  12. syncropaddy

    syncropaddy Senior Member

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    The guts of those pumps look like the ones on VW power steering systems which are ZF units
     

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