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Sun May 19, 2013 9:03 am

To link to this thread
Code: [url=http://www.thesamba.com/vw/forum/viewtopic.php?t=556225&start=0&postdays=0&postorder=asc&highlight=]Brake Caliper ID T2[/url]

With the information available at the time of writing. What I can surmise is as follows.
1971 started out with a small caliper, 12mm mounting holes and 1 bleeder valve, that when mounted bleeder must be on top.
Sometime in 71 they retained the small caliper, 12mm mounting holes but installed two bleeder valves.

1972. 12mm mounting holes with 2 bleeders. Small calipers.

1973-79 larger calipers, 14mm mounting holes and 2 bleeders.
Two manufacturers were available.
ATE 1973-75
GIRLING 1976-79
Note: check your calipers before ordering parts because both will fit 1973-79.

Brake pads are the same for both the ATE and Girling.
Note that these parts are different.
#8 Retaining pin note: girling 8a retaining spring (hairpin), ate uses an expanding collar to hold the Retaining pin in place.
#6 Retainer
#7 Spreader spring
#20-21

It has been reported that VW was known to use up the parts from the previous year. Model year changes occurred in Aug. So if you have a build date close to Aug. check to see if you have the earlier parts.

VdubEngineering. Allows the fitment of more common and economical 74-79 disks/hubs/calipers on 71-72 spindles.

How to identify GIRLING and ATE calipers.

Refer to the parts diagram above. ATE #8, Girling #08 and #8A

#8 ATE Brake pad Retaining pin 73-79 prt 211 615 261 A
Note the little round split compression ferrule on the end. This is what holds the pin in the caliper.

ATE Note the brake pad retaining pin uses a compression furrel to retain the retaining pin.

Girling (Note the Hairpin cotter pin) that retains the Brake pad retaining pin. This identifies it as a Girling caliper.

This One's a Girling later Bay. Note: 14mm mounting holes.

Notice the 14mm mounting holes.

This piston retaining plate is from a Girling caliper. Arrow points in the direction the wheel travels.

71 Caliper

71 ATE notice the 12mm mounting holes.

Note wear the brake line attaches looks like a cows head.

71 bay window

71 only Ate Bus calipers

[/quote]

72 Bus calipers. Early 71 had smaller 12mm mounting holes and the single bleeder. In mid -'71 they installed 2 bleeders.

Note: 14mm mounting holes and two bleeder valves.

Sun May 19, 2013 9:04 am

Moved Down

Sun May 19, 2013 9:05 am

Tcash wrote: Posted in 2008
Rwheeler wrote: Installed a set of CSP Disc brakes from Wolfsburg West. Started yesterday and finished this afternoon. Vey high quality kit from Germany. And expensive at $1,400 bucks!
Go to the galley under baywindow campers and I'll have some pics there in a few minutes.

Sat Oct 26, 2013 4:00 pm

73 Caliper exploded view. Note wave washers for the mounting bolts are not present. Also one bolt is a shoulder bolt and the other is a threaded bolt. I think this is not by design but rather one of the bolts was from another vehicle?

73 Piston Locating plates

73, note wave washers present, retaining pins have compression retainers to locate the pins.

73 Piston Locating plate on piston illustration.

73 Piston Locating plate on caliper illustration.

Sat Oct 26, 2013 4:23 pm

Nice clear photos! W/regard to shoulder bolts, I believe they were
used on all the bus/vanagon calipers, from the very beginning. I've also seen (in a shot of some VW service literature posted right here in this forum) that they appeared at both the top and bottom position at various points in time. The latest Brazilian ATE calipers for late bays have but a single bleeder screw.

Tue Jan 28, 2014 10:12 am

Thanks kreemoweet, forgot about this.

http://www.jerseylooker.com/FicheDump/LateBaywindow/052-00-6-012.jpg

12mm shoulder bolts go on top.

Tue Jan 28, 2014 10:42 am

Tcash wrote: Thanks kreemoweet, forgot about this.
12mm shoulder bolts go on top.

I just posted elsewhere on this that the early disk brake buses had smaller calipers with 10mm thick pads and 12 mm bolts with the shouldered ones on the bottom. They torque to 94 ft/lbs.

The '73 models on up were supplied with larger calipers that take 14mm thick pads, 14mm bolts with the shouldered ones now installed on the top. They torque to 103 ft/lbs.

The shims with cut-out tabs are used to orient the cut-outs in the piston circle to the bottom (the leading edge of the pads) to reduce squealing.
Colin

Tue Jan 28, 2014 12:14 pm

perhaps someone with the yellow late bay service book can find the pics/descriptions and post them? a lot of info in earlier editions of the Bentley manual is not applicable to later model busses.
otherwise, from the 1979 edition Bentley manual. read the text, look at the pic. #15 is the LOCATING BOLT.

Fri Jun 06, 2014 9:52 am

Sun Jun 28, 2015 12:04 pm

Has anyone done a side by side comparison of the later ATE seals VS: the early ones?, they are all 54 MM diameter and aside from the width of the casting and the mounting holes they look the same inside, what am I missing? Why 2 different kits offered?

Edit: Nevermind, I just went a blew a late one apart, aside from the piston being 4mm longer there's no difference in the hydraulic or dust seals.

Rockauto here I come, Daddy needs some new dust seals!

Sun Jun 28, 2015 1:40 pm

my 1971 had ATE style calipers with just pins and no clips. The hardware setup was the same as my 1977 but a smaller caliper. The plates that sat between the piston and pad had the locating tabs.

Tue Apr 14, 2020 7:26 am

The pics have unfortunately gone missing from this article.

I have a 1972 model year T2 that was built in August 1971. The front right caliper has two bleed nipples and the front left caliper has one. They both have 14mm bolts.

They are both ATE. The front left is ATE 32 and the front right is ATE 10 3.

Could anyone tell me whether my brake calipers are the 72-79 ones, or are they the earlier models?

Thanks!

EDIT- They are 12mm mounting holes. I guess I have the earlier one :lol:

Tue Apr 14, 2020 7:36 am

Reload the page? None of the pics are missing?

Tue Apr 14, 2020 7:54 am

Hmm. I'm missing these photos:

Anyway, on a separate note. I'm seeing some retailers selling caliper repair kits that cover the period 71-79 and some that stock two different kits. 70-72 and 72-79. Can anybody shine some light on this?

Examples below:

70-72

https://www.customandcommercial.com/vw-baywindow/b...ash72_709/

72-79

https://www.customandcommercial.com/vw-baywindow/b...ash85_662/

71-79

https://www.justkampers.com/251-698-471-caliper-re...-1986.html

Tue Apr 14, 2020 8:50 am

If you have 14 mm bolts, then you have the late 73-79 calipers. The early 71-72 knuckle had 12 mm threads, and
the 14 mm bolts would not fit thru the 71-72 caliper holes.

You really should not rely on vendor descriptions, as many do not seem to grasp the concept of "model years", going
by date of manufacture or something instead.
As noted in a post earlier in this thread, the seals are identical
for all years of bus ATE calipers. The seals are only what most "rebuild" kits contain. I see that one kit contains new
spring washers for the bolts, so that one would be specific to early or late.

Thu Apr 16, 2020 3:08 pm

I bought a the 72-79 kit, although my van was built in August 1971. The outer seals don’t have a metal ring like the originals, is this the same for most kits?

Thu Apr 16, 2020 5:57 pm

Typically only the Girling calipers (which are only used on very late Bay) have the circlip ring that secures the dust seal to the caliper. If you have a '71 with ATE calipers and the dust seals have a ring, that probably means the calipers were repaired at some point, with a non-OEM kit. The Girling dust seals with the circlip tend to fit looser on the caliper, hence the need for the clip. If the dust seals in your new kits fit the caliper snugly - and are not sloppy or wanting to fall off - they are fine to use.

SL

Thu Apr 16, 2020 9:40 pm

holy fucking shit, is that the ghost of german supply posting?

Fri Apr 17, 2020 6:53 am

Well that’s interesting- I assumed they were original seals. Very glad I replaced them now. Here is a photo of the old seal and the new: