Don't thank me, John Anderson provided this very useful info a while back.  Tim

>From: John Anderson <vwbus@netbiz.net>
>To: Multiple recipients of list <vanagon@lenti.med.umn.edu>
>Subject: Re: Clutch cylinder rebuild kits?
>X-Listprocessor-Version: 6.0c -- ListProcessor by Anastasios Kotsikonas
>
>FWIW I got the rebuild kits for the clutch master and slave
>cylinders the other day from my local import parts guy.  VW
>had only the slave kit available for $31, well import guy
>wants $20 for master kit (2 seals, 1 belows, 1 clip) and
>$20 for slave kit for FAG cylinder (1 seal, 1 belows, 2 clips)
>and $15 for slave kit for ATE cylinder (as above, 1 clip) I bought
>all these as both Vans '81 and '85 needed rebuilt, and they have
>each type of slave.  They also have 1 ATE and 1 FAG master but
>the rebuild kit is interchangeable for masters.  
>
>Further FWIW the master cylinder kit is Beck/Arnley World Parts
>part no 071-7491 is made in germany with a FAG bellows but
>"generic" seals.
>
>The FAG slave kit is a FahrzeugTechnik part contains all FAG
>rubber components and carries their number 656-111 or VW 251 798 041
>Bellows is FAG K2559, seal is FAG H25305
>
>The ATE slave kit is a Wagner kit again with all FAG parts their
>part F103522.  Bellows is FAG K2351 6, seal is FAG H25302, seals
>are near enough interchangeable, bellows are drastically different
>diameters, we'll see if everything fits tomorrow weather allowing.
>
>I also had to pick up a smaller 2 stone cylinder hone for the
>master cylinders which set me back $14 for a nice Lisle tool
>but annoyingly the stones are fairly coarse and finer were
>not to be had, as I'm not about to make a final finish hone
>and can't get sandpaper far enough down the small bores, I'll
>live with the finish, better than I had anyway.
>
>So for a total investment of about $90 I'm rebuilding all
>4 cylinders, where 1 rebuilt master was going to run me the
>same amount.  I'm pretty satisfied but have only thus rebuilt
>the masters, will do the slaves tomorrow.  Seals were not
>quite like OEM for the masters but should not affect function.
>
>I STRONGLY URGE people to bleed these things out now while you
>can, standard brake procedure works fine regardless of Bentleys
>warnings to use a pressure bleeder, Haynes says do it the old
>fashioned way.  The master cylinders in these systems have some
>rather intricate and in both of my cases rather clogged valving
>in the piston and resevoir feed.  I'm not even sure what the valves
>do entirely but expect both my systems to be much improved.  Bleeding
>these would have prevented the profound amounts of sediment from
>forming in each, let alone the rust.
>
>John
>vwbus@netbiz.net
>
>