specialist brake tool for replacing seals/cups

[kps70]

Hi
I'm replacing the seals/rubber cups on my master cylinders (brake and clutch) of my 412 and to get the seals on, I need a special tool. Haynes describe it as originally manufactured by TEVES and that it's a tapered pipe so that the cup can be gradually stretched and slipped on to the piston.
Does anyone know where I can get one?
Thanks
Kieron

[david58]

Hi
I'm replacing the seals/rubber cups on my master cylinders (brake and clutch) of my 412 and to get the seals on, I need a special tool. Haynes describe it as originally manufactured by TEVES and that it's a tapered pipe so that the cup can be gradually stretched and slipped on to the piston.
Does anyone know where I can get one?
Thanks
Kieron

Never saw one before but a small plastic funnel is tapered.

[kps70]

I guess a sawn off plastic funnel at the right diameter might work. I'll give it a go. Cheers

[John411]

Kieron:
Hi, I have a 1971 411 and I want to rebuild the master cylinder. Where did you find the seals to rebuild yours?
thanks,
John S.

[wildthings]

I have a small well rounded radiator hose pickl that I use for such jobs. With a little careful persuasion the seal can be worked into place without damaging it. If the seal is so old and brittle it can't be worked on with a pick it shouldn't be used anyway.

[raygreenwood]

Well put. I just make sure all of my pistons have very smooth edges with 2000 grit paper (the pistons do not seal the bore anyway)...and I lube them with brake paste and use a polished o-ring hook to stretch them on. Ray

[kps70]

Hi John,
great to see a new name appear on the forum.
I actually got my kit from the states on ebay. The same seller also sold me a slave cylinder repair kit for the clutch. Since then though I have managed to get two NOS slave cylinders - lucky!
I'm guessing you are talking about a BRAKE master cylinder? I was repairing the master cylinder on my clutch and now it's fine. However, it seems possible to use a clutch master cylinder from an 80's Vanagon if you can make a right angled bracket - Ray put us on to this adaption through another thread.
I've not been able to get hold of a brake master cylinder repair kit although a few websites claim to have them when you actually try to order one it is no use.
BUT, you can get complete brake master cylinders from the states, remanufactured units. I have one making its way over to me as we speak. The supplier was www.thepartsbin.com
"A1 CARDONE MASTER CYLINDER, REMANUFACTURED -- A High Quality, Direct Fit OE Replacement Master Cylinder, Made From Cast Iron With Premium Protective Coating To Extend On-Car And On-Shelf Life, Features OE Quality Seals For Performance And Reliability, 100% Computer Tested, With A1 Cardone Product's 3-Year And 36,000-Mile Warranty"
Good luck
Kieron

[kps70]

be careful though as left hand drive master cylinders are mirror images of the right hand drive ones!