Author Topic: Mercedes 6.9: Sintered Filter in Pressure Regulator  (Read 1007 times)

jllgd

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Mercedes 6.9: Sintered Filter in Pressure Regulator
« 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

TJ 450

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Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
« Reply #1 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
1976 450SEL 6.9 1432
1969 300SEL 6.3 1394
2003 ML500

jllgd

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Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
« Reply #2 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

rumb

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Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
« Reply #3 on: 17 July 2019, 09:28 AM »
A1163270091

unobtanium
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daantjie

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Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
« Reply #4 on: 17 July 2019, 09:45 AM »
Member "tcj" sells these.
Daniel
1977 450 SEL 6.9 - Astralsilber

slfan

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Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
« Reply #5 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. 
1978 - 450SEL 6.9 - 3170
1978 - 450SEL 6.9 "Parts Car" - 2973

s class

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Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
« Reply #6 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.

'76 6.9 Euro, '78 6.9 AMG, '80 280SE, '74 350SE, '82 500SEL euro full hydro, '83 500SEL euro full hydro , '81 500SL

PosedgeClk

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Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
« Reply #7 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?
1979 450SEL 6.9

jllgd

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Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
« Reply #8 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
« Last Edit: 19 July 2019, 06:35 AM by jllgd »

PosedgeClk

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Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
« Reply #9 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.
1979 450SEL 6.9

s class

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Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
« Reply #10 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.

'76 6.9 Euro, '78 6.9 AMG, '80 280SE, '74 350SE, '82 500SEL euro full hydro, '83 500SEL euro full hydro , '81 500SL

tcj

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Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
« Reply #11 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

Regards,
Thomas
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raueda1

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Re: Mercedes 6.9: Sintered Filter in Pressure Regulator
« Reply #12 on: 20 July 2019, 08:28 PM »
Will one of those cheap ultrasonic jewelry cleaners do a decent job on these little parts?
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0