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Triumph TR6 - Brake Servo Repair- need diaphragm

Howdy.

I have a failed brake servo unit (power brake)

The diaphragm has a 3/4 inch rip in it. Failed while driving back from the Adirondack mountains in eastern New York.

As far as I am aware there is no replacement available on the market and a whole aftermarket servo unit must be bought. Is anyone aware if there is a diaphragm that one can buy?
Michael Petryschuk

They can be rebuilt
http://www.applehydraulics.com/brakes.htm
DON KELLY

I just replaced mine...I'm telling you after all the research I did...just buy a new one....BPNW has a good price on theirs. Just put theirs in my TR6 last week. Works great and now I'm good for another 35 years.
JT White

Many TR6 servos have been rebuilt by Brake Materials&Parts Inc. Ph-(260)426-3331) for about $100. It is the successor to vendor recommended on the Buckeye site. I don't think the diaphragms are available. I had mine rebuilt about 8 years ago and it is still working.
Berry
BTP Price

By the way... Mr Good now sells a replacement to rid yourself of that booster. No need if you don' mind just a wee bit stiffer brakes and what he says are quicker responses from the brakes

http://www.goodparts.com/shop/index.php?productID=473
DON KELLY

Thanks for the ideas.

In reviewing options on the web , I am trying to repair the diaphragm with "Plasti Dip" a spray on rubber coating. This technique has been tried by others on these types of diaphragms with success I guess. I figure for the $15 can it is worth a try since I have the unit apart and I hate to scrap it without trying.

My back up is to go with new since I can get it locally same day.

I called Brake Materials and parts and he said he could rebuild the one I have but to ship it there and back across the border and pay for the repair will exceed 50% of the cost of a new one and I figure new has less chance of failure.

I started on the repair tonight so I will let you know how it goes in the next few days.
Michael Petryschuk

Do you really want to "flirt" around with trying a "repair" of some question on your brakes? I'd just get the new one and call it good.
JT White

JT

When I set out to rebuild this car, I vowed that I would use it as a learning experience in repair techniques. I want to try this route and if it works, there are probably other ways to apply this technique. I am pretty sure that the repair places mentioned above use a similar way to repair the diaphragm since diaphragms are no longer available based on what I have been told.

I have pulled this unit apart before during the rebuild from 2002-2005 to clean it so I am familiar with the dis-assembly and reassembly procedure. So to me doing it myself or having someone else do the repair in the same way provides the same risk.

The brake servo is strictly an assist unit and in failure will not stop the brakes from working as I experienced on my way back from our trip to eastern New York State. Thus worst case is it fails after this repair on a typical trip and I have to press harder on the brakes and adjust my driving until I get it home and go for the new unit. Removing and installing the unit is a 30 minute job. So nothing ventured nothing gained is my approach on this.
Michael Petryschuk

Repair facilities are NOT repairing your old diaphragm. They will manufacture a new one before they apply rip-stop to one. I know it assists but it's still not something I'm willing to flirt with a repair especially if during a panic ctop it fails and I don't get the expected brake application as someone pulls in front of me....if there are none out there then where do the new servos come from...there is a difference between whats available for retail sell and whats available in the manufacturing industry. There are no replacement gaskets available for the oil filter conversion but they still got plenty to include in the kits...they just don't sell them singularly. Sorry to sound so negative, it's just not something I'm willing to "repair" without the proper replacment parts.
JT White

i read a link once that said the the diafram from and early mustang would work, only problem is the booster from and early mustang is rarer than hens teeth. try BUSH POWER BRAKE in national city ca. had few rebuilt there for mustangs, and never had a problem from their rebuilds. jim
jw nolen

My repair attempts on the diaphragm hole with e srayon rubber and a second attempt with silicon gasket material have failed. The repair material does not stick well to the diaphragm. I bought a replacement unit today and installed it. All is fixed.
Michael Petryschuk

This thread was discussed between 12/07/2011 and 24/07/2011

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