cquisuila Posted December 23, 2022 Share Posted December 23, 2022 (edited) Hello My brake pedal is hard so i think to change my power booster it is cardon 5471324 as riviera 1965 (i have a riviera 1966) but it is difficult available in stock so DO it exist an alternative as this booster please ? Edited December 23, 2022 by cquisuila (see edit history) Link to comment Share on other sites More sharing options...
EmTee Posted December 23, 2022 Share Posted December 23, 2022 Are you sure the booster is bad? I thought mine was until I replaced my hydraulic brake hoses and that restored the power assist. Most people here seem to send their boosters out to be rebuilt. Link to comment Share on other sites More sharing options...
jframe Posted December 24, 2022 Share Posted December 24, 2022 I tried the Card one booster for my 65, and the bolt pattern was wrong. I suggest Booster Dewey as a reduild in Oregon; he fixed me up right Link to comment Share on other sites More sharing options...
telriv Posted December 26, 2022 Share Posted December 26, 2022 To ALL. I have used Harmons Classic Brakes as recently as 2 weeks ago. Pricing is always competitive & the turn-a-round time is very reasonable. Being closer to myself in the N.E. is an advantage as far as shipping goes. Just my thoughts for the subject at hand. Tom T. Link to comment Share on other sites More sharing options...
cquisuila Posted December 26, 2022 Author Share Posted December 26, 2022 yeah if i was american it would be easier !! because shipping AND duties double often the price.🤨 but i have a riviera !!😁 Link to comment Share on other sites More sharing options...
NC1968Riviera Posted January 4, 2023 Share Posted January 4, 2023 On 12/24/2022 at 2:41 PM, jframe said: I tried the Card one booster for my 65, and the bolt pattern was wrong. I suggest Booster Dewey as a reduild in Oregon; he fixed me up right Booster Dewey is no longer in business. I verified this last October when I was visiting Portland Oregon. 1 Link to comment Share on other sites More sharing options...
NC1968Riviera Posted January 4, 2023 Share Posted January 4, 2023 (edited) Someone posted the following on the 68-69 Riviera Facebook group a few days ago: "I purchased a Cardone remanufactured Power Brake booster (Delco) for my 69 Riv and it failed within a month. It's a piece of rubbish and not worth replacing under warranty. I've also learned that Brakebest and Wearever are 'house brands' who sell parts sourced from Cardone. Does anyone know where I can purchase a reliable new or remanufactured Power Brake Booster not made by Cardone?" Edited January 4, 2023 by NC1968Riviera (see edit history) Link to comment Share on other sites More sharing options...
OldGerman Posted January 4, 2023 Share Posted January 4, 2023 2 hours ago, NC1968Riviera said: Booster Dewey is no longer in business. I verified this last October when I was visiting Portland Oregon. That is sad. 😢 I‘m happy Mine was done at Dewey two years ago. Link to comment Share on other sites More sharing options...
telriv Posted January 4, 2023 Share Posted January 4, 2023 Like I've stated earlier I use Harmons Classic Brakes. I don't think you can go wrong using them Mike. Tom T. Link to comment Share on other sites More sharing options...
Aaron65 Posted January 5, 2023 Share Posted January 5, 2023 8 hours ago, NC1968Riviera said: Booster Dewey is no longer in business. I verified this last October when I was visiting Portland Oregon. Their Facebook page says they're still open; I think they just moved or were bought out. With that being said, I use Harmon's; they have good communication and they seem to do a good job. 1 Link to comment Share on other sites More sharing options...
avgwarhawk Posted January 5, 2023 Share Posted January 5, 2023 (edited) 8 hours ago, NC1968Riviera said: Booster Dewey is no longer in business. I verified this last October when I was visiting Portland Oregon. Their site is still up so someone is paying to keep it up. It appears they are still in business. Edited January 5, 2023 by avgwarhawk (see edit history) 1 Link to comment Share on other sites More sharing options...
cquisuila Posted January 5, 2023 Author Share Posted January 5, 2023 (edited) what do you think of this system please ? I HAVE drums front and rear. EASY to fit ? is it more that original master cylinder ? n my riviera 1966? Edited January 5, 2023 by cquisuila (see edit history) Link to comment Share on other sites More sharing options...
EmTee Posted January 6, 2023 Share Posted January 6, 2023 You have a 1966 Riviera, correct? If so, it had a single cylinder master cylinder from the factory. Has it already been converted to a dual-cylinder master, or are you planning to do that together with the booster replacement? If you are keeping the factory drum brakes, the dual-circuit master cylinder from a 1967 four-wheel drum application will work. You don't want a master cylinder from a disk/drum application, as the drum brakes require the master cylinder have a residual pressure check valve that isn't used on disk brakes. You can order the kit to rebuild your booster here: https://harmonclassicbrakes.com/ and they will ship the kit internationally. Link to comment Share on other sites More sharing options...
cquisuila Posted January 6, 2023 Author Share Posted January 6, 2023 (edited) yes it is a car 1966 i have single cylinder master and yes, in the future , i will change perhaps with this double brake system (master cylinder and new servo brake) Unfortunatly harmonclassicbrakes.com doesn"t delivery the booster to France and only the kit to rebuild > However, Performanceonline ships internationally. ---> i just ordered a kit to rebuild my single master cylinder on Rockauto.com because it had an output leak to the servo brake and that's probably what was causing the lack of power in my brakes ! i will verify when i will rebuild the master cylinder ---> when i dismantled the brakes i sawn that the servo brake moves well when i press the brake pedal Edited January 6, 2023 by cquisuila (see edit history) 1 Link to comment Share on other sites More sharing options...
EmTee Posted January 6, 2023 Share Posted January 6, 2023 Hopefully when you put the system back together you will find that the booster is working. If you have not replaced your rubber brake hoses, do that now while the hydraulic system is open. A collapsed rear hose on my '67 gave the impression that the booster was faulty. Replacing the hose restored the power brake boost function on my car. Link to comment Share on other sites More sharing options...
cquisuila Posted January 6, 2023 Author Share Posted January 6, 2023 (edited) 57 minutes ago, EmTee said: Hopefully when you put the system back together you will find that the booster is working. If you have not replaced your rubber brake hoses, do that now while the hydraulic system is open. A collapsed rear hose on my '67 gave the impression that the booster was faulty. Replacing the hose restored the power brake boost function on my car. yes i remplaced the 3 hoses (2 front and 1 in rear) and the brake fluid comes to rear in the cylinder Edited January 6, 2023 by cquisuila (see edit history) 1 Link to comment Share on other sites More sharing options...
cquisuila Posted January 11, 2023 Author Share Posted January 11, 2023 so i rebuild the master cylinder and it no longer leaks OK but now the brake pedal is no longer hard AND it is pumping effect with air noise and i haven't braking i notice that the rubber dust boot rear the power booster decay ! do you think that it is very important and NOT only for dust ? i know that i have opened the brake system with rebuild the master cylinder and perhaps it needs a brake purge the fluid reservoir is full i am tired! help please !;) Link to comment Share on other sites More sharing options...
telriv Posted January 11, 2023 Share Posted January 11, 2023 That rubber boot is to have some insulation inside to filter the air going into the rear of the booster to keep out dust & debris. Tom T. Link to comment Share on other sites More sharing options...
cquisuila Posted January 11, 2023 Author Share Posted January 11, 2023 1 minute ago, telriv said: That rubber boot is to have some insulation inside to filter the air going into the rear of the booster to keep out dust & debris. Tom T. so it is not the problem Link to comment Share on other sites More sharing options...
gungeey Posted January 11, 2023 Share Posted January 11, 2023 If you opened up the system you need to bleed it. The master cylinder you just rebuilt needs to be bled first and foremost. Link to comment Share on other sites More sharing options...
cquisuila Posted January 11, 2023 Author Share Posted January 11, 2023 bleed master cylinder ? i filled the reservoir I will open the purge screw at the back to see if the liquid comes well ! Link to comment Share on other sites More sharing options...
cquisuila Posted January 11, 2023 Author Share Posted January 11, 2023 9 minutes ago, gungeey said: If you opened up the system you need to bleed it. The master cylinder you just rebuilt needs to be bled first and foremost. so it is not the problem Link to comment Share on other sites More sharing options...
gungeey Posted January 11, 2023 Share Posted January 11, 2023 Buddy there's air trapped in the master cylinder. Look on you tube how to set up a pipe to bleed it internally. You also opened up the sealed system removing the master. You might get pedal back bleeding at drivers front wheel but bleed the hole system and then report back if you still don't have a pedal. Link to comment Share on other sites More sharing options...
1965rivgs Posted January 11, 2023 Share Posted January 11, 2023 Try lightly tapping the brake pedal and have a 2nd person watch for air bubbles to enter the master cylinder reservoir. If you see air bubbles, continue to lightly tap the brake pedal until the bubbles stop. Then, check to see if you have a firm pedal. Tom Mooney Link to comment Share on other sites More sharing options...
cquisuila Posted January 11, 2023 Author Share Posted January 11, 2023 (edited) ok I'm good at reassembling the master and bleeding as this >> is it ok ?? Edited January 11, 2023 by cquisuila (see edit history) 1 Link to comment Share on other sites More sharing options...
cquisuila Posted January 13, 2023 Author Share Posted January 13, 2023 at this moment the brake pedal is normal in position D it is efficient but in REVERSE IT DOES NOT BRAKE i'm going crazy🤪 I was told about a depression pipe.... i finally ordered a new master cylinder and i will see Link to comment Share on other sites More sharing options...
EmTee Posted January 13, 2023 Share Posted January 13, 2023 Have you inspected the brake shoes? Contamination (oil or brake fluid) on the friction material could be the cause. Link to comment Share on other sites More sharing options...
cquisuila Posted January 13, 2023 Author Share Posted January 13, 2023 i will inspect thanks Link to comment Share on other sites More sharing options...
EmTee Posted January 13, 2023 Share Posted January 13, 2023 Also check the shoe adjustment. They may be set too loose. Link to comment Share on other sites More sharing options...
cquisuila Posted January 13, 2023 Author Share Posted January 13, 2023 and why position reverse it is not efficient ? Link to comment Share on other sites More sharing options...
EmTee Posted January 13, 2023 Share Posted January 13, 2023 The 'servo action' isn't as effective in reverse. Servo action brakes definition Brakes so constructed as to have one end of the primary shoe bearing against the end of the secondary shoe. When the brakes are applied, the primary shoe attempts to move in the direction of the rotating drum and in so doing applies force to the secondary shoe. This action, called "servo action," makes less brake pedal pressure necessary and is widely used in brake construction. 1 Link to comment Share on other sites More sharing options...
cquisuila Posted January 20, 2023 Author Share Posted January 20, 2023 (edited) I JUST received my new cylinder master and i sawn the OUT to connect the brake pipe > This new part is opened at the 2 sides (end and out) and the metal is delivered separately (on mine there isn't this screw) Please what is the end screw for ? Bleed ? (see picture) When i will bleed, i think to screw this metal screw ; ok ? Edited January 20, 2023 by cquisuila (see edit history) Link to comment Share on other sites More sharing options...
RivNut Posted January 20, 2023 Share Posted January 20, 2023 Looks like a master cylinder for a 1963. That port was where the hydraulic switch for the brake lights was mounted. Link to comment Share on other sites More sharing options...
cquisuila Posted January 21, 2023 Author Share Posted January 21, 2023 (edited) Ah OK thanks for this quick answer I hope that it is not important for my riviera 1966 I will close with the screw Edited January 21, 2023 by cquisuila (see edit history) 1 Link to comment Share on other sites More sharing options...
EmTee Posted January 21, 2023 Share Posted January 21, 2023 I think it it simply a matter of stocking one part that covers multiple years, rather than having to maintain a '63-only part. If the bore size matches the original it should work fine. Just plug the unused port. 1 Link to comment Share on other sites More sharing options...
OldGerman Posted January 22, 2023 Share Posted January 22, 2023 IMHO You should leave working with hydraulic brake to a experienced car mechanic or ask someone to assist. Link to comment Share on other sites More sharing options...
cquisuila Posted January 23, 2023 Author Share Posted January 23, 2023 13 hours ago, OldGerman said: IMHO You should leave working with hydraulic brake to a experienced car mechanic or ask someone to assist. i didn't know a port on master cylinder for the brake light it is often on the brake pedal with a switch because i know a lot of of brake system Link to comment Share on other sites More sharing options...
EmTee Posted January 23, 2023 Share Posted January 23, 2023 I believe Buick switched to a mechanical switch at the pedal linkage for 1964. Up to that point, Buick used some form of hydraulic pressure switch. If you search the post-war forum I think there was a discussion about a Harley-Davidson switch that seems to work pretty well. If I recall, that came up in response to someone who had the opposite issue; brake lights didn't come on under light braking. Link to comment Share on other sites More sharing options...
cquisuila Posted January 23, 2023 Author Share Posted January 23, 2023 8 minutes ago, EmTee said: I believe Buick switched to a mechanical switch at the pedal linkage for 1964. great > up t0 1963 it is totally exact ! Link to comment Share on other sites More sharing options...
OldGerman Posted January 29, 2023 Share Posted January 29, 2023 On 1/23/2023 at 9:54 AM, cquisuila said: i didn't know a port on master cylinder for the brake light it is often on the brake pedal with a switch because i know a lot of of brake system Ok, then I‘m relieved. 👍 2 Link to comment Share on other sites More sharing options...
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