Search found 38 matches

by Grayjay66
Sat Mar 07, 2020 1:15 am
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

Well I think the slight lip on the discs was it. Since one of the 2 Dunlops developed a seal leak, I took it off and put on a Zeus with pads filed down on the outside corners where they touched the disc outer edge. So with three Zeus and one Dunlop, I ran the car 8 miles today on a country road with...
by Grayjay66
Wed Mar 04, 2020 10:09 pm
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

Back to the proper priority yesterday.. My rotors are original with 60 k and have developed a small lip along the outside rim maybe 1/32 or less. Anyway I thought perhaps the outside corners of the new pads could be riding on this lip causing the Pads to ride at a slight angle to the face of the dis...
by Grayjay66
Tue Mar 03, 2020 6:36 pm
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

Possibly, however if true that would mean somewhere there is trapped pressure.

With the bleed open and brake lines disconnected the Zeus stay bound.

How can that be explained?
by Grayjay66
Sun Mar 01, 2020 7:41 am
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

Bill, you may have guessed I was an engineer which is why I've continued to fuss with these vs just moving on. I'm still at the same net place I was when I first mounted the Zeus , bled and they bound. Lots of experiments between then and now but no different result. The problem is as yet I cannot d...
by Grayjay66
Thu Feb 27, 2020 4:12 pm
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

Thank you for the suggestion on Cooper crafts, I had heard of them but never did any research. I went with the Zeus initially because the repro Dunlops were more expensive and the Zeus were stainless eliminating the corrosion in a steel cylinder that started this whole saga. Now it would seem the Wi...
by Grayjay66
Wed Feb 26, 2020 10:38 pm
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

Barrie thank you for taking the time to think about this. Actually the Dunlops either have a return spring washer or a return spring internal. These springs cause the retraction not the seal. I think sometime in the 70's brake design changed to a seal retraction. My long time mech remembers the Merc...
by Grayjay66
Wed Feb 26, 2020 3:54 pm
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

Looking back when I very first put on the LF Zeus I had my old worn pads in. Ie more piston travel. With new pads in , less piston travel . In both cases the binding occurred during bleeding before even starting the car. I noticed if I backed off the 4 bolts the binding released . I think this is be...
by Grayjay66
Tue Feb 25, 2020 1:31 am
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

Btw I did compare the Dunlop to the Zeus and they appear to be dimensionally the same.

The internal difference is the spring retract internal to the dunlops vs a seal in the Zeus.

My friends tell me I should have gone with Wiwoods in the first place. Maybe so.
by Grayjay66
Tue Feb 25, 2020 1:28 am
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

Today I tried placing shims between the face of the Zeus and the carrier. Still binding. Tried removing the dust seal completely on the thought that was bunching up. Still binding. Decided I was done messing with these Zeus. Put my old Dunlops back on and they work fine no binding , full stop. May b...
by Grayjay66
Mon Feb 24, 2020 5:10 am
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

Good suggestion.
by Grayjay66
Mon Feb 24, 2020 1:58 am
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

i remounted and bled today , without even being fully bled the brake bound up again. I did note when I took the outboard cylinder/ piston off the car completely, draining all fluid, the inboard was still binding. Do you think I am correct in thinking then the problem has nothing to do with the hydra...
by Grayjay66
Sun Feb 23, 2020 6:23 am
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

in my case the disc is central to the carrier. The Zeus cylinder/piston body Bolts to the carrier . I'm not clear about what you actually shimmed. Placing shims under the 4 bolts of the Zeus would move it out from the carrier and disc forcing the Pistons to move further , which is equivalent to havi...
by Grayjay66
Sat Feb 22, 2020 10:03 pm
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

I did not change any shims on the carrier. Just unbolted the Dunlops and bolted on the Zeus.
by Grayjay66
Sat Feb 22, 2020 2:14 am
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

Thank you for the suggestion. Today I did the following: After leaving the car sit overnight, all engine off, I jacked the front up and tried to turn the left front wheel It was binding. I then disconnected the manifold vacuum line - still binding. Pumped brakes , seemed binding was slightly worse. ...
by Grayjay66
Fri Feb 21, 2020 5:46 am
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

I spoke too soon. I drove 6 miles. Parked the car, came back 10 minutes later and found the knockoffs too hot to touch on both sides. The brakes are still binding. I quit the car through the holidays and started again today thinking what else could be the problem. I checked reaction valve works. Bac...
by Grayjay66
Thu Nov 07, 2019 6:23 pm
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

For the first set of cylinder/Pistons, I tried both the used pads and the new pads and binding occurred with both. I did not do any filing of the pad edges during those trials. Zeus found nothing wrong with the binding set on their test stand. Zeus did say all along I needed to have Zeus on both whe...
by Grayjay66
Tue Nov 05, 2019 3:59 am
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

SUCCESS! All 4 cylinder/Pistons are now working as they should. On the one sticking, I loosened the 4 retaining bolts by 3 turns removed the retaining clip and pulled out the pad. I found a 1/16 square slight gouge at the fore and aft edge of the pad. I also found these pads are built around a circu...
by Grayjay66
Mon Nov 04, 2019 4:47 am
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

After traveling for several weeks was able to put the new set Zeus sent on the left front along with Zeus on the right front. So all Zeus now. Now right front are working fine, no heating. The left front inboard is binding causing cylinder housing, disc and hub to be very hot after a mile or so. Out...
by Grayjay66
Mon Sep 30, 2019 6:54 am
Forum: Series 1
Topic: Zeus Callipers
Replies: 10
Views: 5280
United States of America

Re: Zeus Callipers

Thanks , I should have mine back from Zeus soon. They could find no fault.
by Grayjay66
Mon Sep 30, 2019 6:52 am
Forum: Series 1
Topic: Zeus single pot. Pistons not retracting
Replies: 64
Views: 10333
United States of America

Re: Zeus single pot. Pistons not retracting

Zeus has tested the calipers and taken them apart with no faults found. They sent a set back, so should have them to try again soon.

Zeus has been really good to deal with. The Vendor in Ohio, I would not buy bubble gum from.