Source for caliber O rings

[Dee]

Looking for O rings to fit an ATE caliber on a Ralt Rt5 1982 , the pucks are 1.65 in /41.9mm in Da. any idea on a source.Thanks,Dee

[R. Pare]

Maybe check with Dave Bean?

[scott fairchild]

Call Keith Averill

[Tom Fraelich]

The last few ATE rebuild kits I bought (from some west coast buggy shop) were so old the o-rings had turned to dust. I finally gave up and started using square section metric o-rings from McMaster Carr. Check their website, for your dimensions. Only available in Buna-N so not optimal for long life, not a problem if you rebuild seasonally.

[R. Pare]

maybe just search for them on the 'net. look at suppliers like Zatkoff.

[johnhafkenschiel]

Looking for O rings to fit an ATE caliber on a Ralt Rt5 1982 , the pucks are 1.65 in /41.9mm in Da. any idea on a source.Thanks,Dee

Can you post the piston diameters? When I rebuilt my SV calipers, I was able to source new parts from a Porsche aftermarket supplier.

[Dee]

Thanks all, was able to get some from back east and a couple of kits from the UK

[fleetdude]

I found EPDM o-rings to fit ATE's at www.theoringstore.com. ordered AS568A 223 for nominal 1.625 id x .125cs. they are round, which their website said can be used in place of square, and they fit/working great.
by the way, what brake pads are you using in these calipers?

[jkrt125]

@Fleetdude, Round section orings/seals for a brake caliper is not a good idea, they will "seal" but they will not provide the "return" that a square/rectangular seal would, and, the sealing area is much smaller.

[johnhafkenschiel]

@Fleetdude, Round section orings/seals for a brake caliper is not a good idea, they will "seal" but they will not provide the "return" that a square/rectangular seal would, and, the sealing area is much smaller.

That is correct. Provide them with the piston diameter and groove width:
PMB PERFORMANCE
162 W 9240 S
SANDY, UT 84070 855 786-7104
Contact This Porsche/ATE supplier for correct seals: