[T3] Single Circut Master Cyl and wheel cyl kits? Or parts to assemble?

[elvisleft_bldg at comcast.net]

Soren according to my parts manual for type 3 it says rebuild kit 311 698 191A Is for a 20.64 stroke 36mm From chassis numbers: 211 974  311-314-361-364 
and From Ch. No. 365 000 001- 365 220 883 
I do have a 1965 1500S with chassis number ... 173 669 
Thank you again I am confused. 
Kelleigh  

----- Original Message -----
From: "Soren Jacobsen" <snj at pobox.com> 
To: type3 at vwtype3.org 
Sent: Thursday, February 7, 2013 6:46:58 PM 
Subject: Re: [T3] Single Circut Master Cyl and wheel cyl kits? Or parts to assemble? 

On Feb 5, 2013, at 8:36 PM, elvisleft_bldg at comcast.net wrote: 

> I think my Single circut master cylinder needs a possible rebuild and I need to assemble the parts there about to do this. 
> I am also concerned about wheel cylinders and kits to rebuild those too.. I can find shoes and lines and such but nothing else. Mr Adney do you have specifications as to what would work and/or a rebuild kit avail? I do believe on my 651500S is should be a 19.05  with a 33 or 36 stroke?  but since I got that information from ISP west I could be wrong. I am checking my parts book which gives me a kit number 
> 
> 311 698 181 B 

The size of your master cylinder depends on what kind of car you have.  1965 Variants used 20.64mm (13/16") master cylinders (same as was used on all T3s through 1963), while 1965 Notchbacks/T34s used 19.05mm (3/4") master cylinders.  If you have a Notchback/T34, the rebuild kit is 311 698 181.  If you have a Variant, the rebuild kit is 311698191A (ATe 3.0370-0220.2).  I've got a 65 Variant myself, and I recently bought an NOS (or factory rebuilt?) master cylinder for it.  Predictably, the primary cup was rotten, as you can see here: http://blef.org/vw/t3/20mmMCrottencup.jpg  The primary cup is easily obtained, but I've yet to find a source (other than NOS kits, which, as you note, are a bit suspect) for the secondary seal.  For a 20mm master cylinder, you can get the primary cup from NAPA as part number UP12400.  With all that said, you really should check and see what size master cylinder is installed in your car.  After all these years, it's not at all unlikely that the ma 
 ster cylinder has been replaced at some point, and who knows what size was installed by whomever last worked on the car.  Most of the master cylinders should have a 19 or 20 stamped on them to help you identify the master cylinder without removing it from the car. 

For front wheel cylinders, a 1965 T3 should have 22.2mm (7/8") cylinders, which you can find at NAPA as part number UP3023.  With the rear cylinders, again, it depends on what type of car you've got.  A Variant should have 23.8mm (15/16") rear cylinders, while a Notchback/T34 should have 22.2mm (7/8") cylinders.  The 23.8mm cylinder cups are available as NAPA UP3535.  Once again, I wouldn't be all that surprised if the rear wheel cylinders had been replaced with the wrong size, so I'd suggest measuring the rear cylinders before going out to buy parts. 

If you feel like buying all new parts, the rear cylinders for a 65 Variant are, luckily, shared with Super Beetles (fronts for them), so you ought to be able to find 361611067A at any reputable VW parts supplier.  I'm pretty sure the 22.2mm rear cylinders are easy to come by as well, but I've never looked. 

Soren 
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