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Garage => Mechanicals => Topic started by: jllgd on 17 July 2019, 05:43 AM

Title: Mercedes 6.9: Sintered Filter in Pressure Regulator
Post by: jllgd on 17 July 2019, 05:43 AM
As a preventive measure on my 6.9, I am looking to replace the small sintered (sinter) filter that is fitted inside the hydraulic pressure regulator, at the hydraulic high pressure port.

Anyone now where to obtain this filter?
Unfortunately I don't have the part number.
Perhaps someone here has this number available?
Thanks
Title: Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
Post by: TJ 450 on 17 July 2019, 06:34 AM
This part is NLA, it just needs to be soaked in brake cleaner or even ultrasonically cleaned.

Tim
Title: Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
Post by: jllgd on 17 July 2019, 06:50 AM
Thanks a lot for this info.
But I still would like to get the part number? Anyone?
Thanks
Title: Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
Post by: rumb on 17 July 2019, 09:28 AM
A1163270091

unobtanium
Title: Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
Post by: daantjie on 17 July 2019, 09:45 AM
Member "tcj" sells these.
Title: Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
Post by: slfan on 17 July 2019, 10:42 PM
I purchased one from the Classic Center in Irvine about two years ago.  It is important that you also get a new gasket for the top part of the reservoir that you open to reach the hydro pneumatic fluid filter. 
Title: Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
Post by: s class on 17 July 2019, 11:10 PM
The sintered filter is accessed via a steel closing plug facing the rear of the car.  No need to remove the regulator.  However, the regulator must indeed be removed to change the easily available paper filter element on its underside.
Title: Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
Post by: PosedgeClk on 18 July 2019, 08:36 AM
I would not replace this filter unless it were corroded, and even then, corrosion can oftentimes be removed. The sintering process means that metal particles were pressed together under heat, so you are looking at a porous metal object here. The particles appear to be on the order of 0.1mm, so this is in a different realm than activated charcoal or paper.

Counterarguments, anyone?
Title: Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
Post by: jllgd on 19 July 2019, 06:14 AM
I would not replace this filter unless it were corroded, and even then, corrosion can oftentimes be removed. The sintering process means that metal particles were pressed together under heat, so you are looking at a porous metal object here. The particles appear to be on the order of 0.1mm, so this is in a different realm than activated charcoal or paper.

Counterarguments, anyone?

Why would you not replace this sinter filter with a new one? New is better! No?
Thanks
Title: Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
Post by: PosedgeClk on 19 July 2019, 08:53 PM
That's not how it works. If you coughed on your otherwise brand new car key, would you rather wipe it off with a cloth or pay the dealer $700 for a new key? If you throw that filter away, there is a good chance that you could come back in 5000 years, wash it off with acetone, and reinstall it in your now prehistoric 6.9. I am not joking.
Title: Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
Post by: s class on 19 July 2019, 10:42 PM
Well it's moot since new ones are not available.  Take it out, clean it with brake and parts cleaner, then compressed air, and refit it.
Title: Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
Post by: tcj on 20 July 2019, 10:21 AM
Member "tcj" sells these.

correct. We reproduced the sinterfilter as they are NLA for a number of years now.
see here:
https://www.ebay-kleinanzeigen.de/s-anzeige/mercedes-w116-450sel-6-9-w126-mit-hpf-sinterfilter-neu-1163270091/1039701009-223-1688 (https://www.ebay-kleinanzeigen.de/s-anzeige/mercedes-w116-450sel-6-9-w126-mit-hpf-sinterfilter-neu-1163270091/1039701009-223-1688)

Regards,
Thomas
Title: Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
Post by: raueda1 on 20 July 2019, 08:28 PM
Will one of those cheap ultrasonic jewelry cleaners do a decent job on these little parts?