[s-cars] High pressure hydraulic line, part II

[Kirby Smith]

Igor:

I presume you determined that Viton (fluorocarbon) was compatible with
the hydraulic oil (not that I would expect otherwise).  And, that the
maximum temperature to which they are subjected is within their useful
range.  Are silicone o-rings less expensive than Viton these days?  I
can't see Audi picking a more expensive o-ring material if it weren't
needed.

Other end o-rings?  I didn't measure, but I'm pretty sure that when I
replaced them once that they were the same size on both ends of the
hose.  Note that the bolts are the same size, even if oppositely
filtered.

kirby


Igor Kessel wrote:
> 
> Kirby Smith wrote:
> 
> > Igor:
> >
> > The o-ring data, as best one can easily measure a soft o-ring without
> > special tools, are as follows. I used vernier calipers.  Note that the
> > o-rings are red, and I presume silicone.  They do seem a bit soft to be
> > Viton.  They are a bit brighter red than US industry used to use for
> > silicone.
> >
> > O-ring OD = 16.5 mm
> > O-ring ID = 11.5 mm
> > O-ring section diameter = 2.5 mm
> >
> > retaining cavity dimensions (more difficult to measure)
> > center OD = 12.0 mm
> > outer ID = 17.5 mm
> > well depth = 2 mm
> >
> > A Parker o-ring catalog should show  a ring very close to these
> > dimensions and provide retention cavity dimensions that agree
> > approximately with the numbers above.  I have forgotten whether o-rings
> > are like bearings and sold in metric sizes, or in English unit sizes.
> > If the latter you will have to convert.
> >
> > kirby
> 
> Thanks a million, Kirby! I am ordering from McMaster these:
> 9263K236
> Metric Viton O-Ring 2.5 mm Width, 12 mm ID
> $ 6.18 per Pack
> This item is only sold in Packs of 10
> 
> along wiht the O-rings for the end of this line:
> 9263K263
> Metric Viton O-Ring 3 mm Width, 10 mm ID
> $ 7.11 per Pack
> This item is only sold in Packs of 10
> 
> as well as a few other O-rings for other lines.
> 
> --
> Igor Kessel
> two turbo quattros