05-28-2020, 12:19 AM | #1 |
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brake problem
I've been converting my 35 to Bendix style brakes. I cannot get a pedal....
I am convinced the RH front wheel cylinder is bad. Long story, but I'll try to give all relevant details to enable you to make a diagnosis. Master cylinder and all wheel cylinders were purchased from Summit. When they arrived, the m/c was made in Taiwan, all wheel cyl's were chink. Master cylinder 1 1/16 bore. Front wheel cylinders 1 1/8 bore. Rear w/c's 7/8 bore. I am running a remote reservoir up on the firewall with a line into top of m/c. Fitted everything up to discover the rear wheel cyl's were tapped 3/8 24 UNF. Does not suit the 7/16 tube nuts required for Ford 1/4" lines. Ordered more rear cylinders from James @ Gotham City... Fitted them and plumbed up. Attempted to bleed all brakes. No pedal. By a process of elimination; plug the tee at back of master cylinder that runs to front brakes, I could get a good hard, high pedal which indicates to me that the rear brakes are 'sweet'. Plumb in the front brakes, pedal goes to floor. No leaks apparent anywhere. Reading on here that some chinkee cylinders don't have the bleed nipple at top of bore, I've unbolted front cylinders from backing plates, leaving the hoses attached, removed the links and boots, and used Gclamps and plastic endcaps to prevent the pistons from being blown outta the bores, I again bled the cylinders, being able to position them in various positions to preclude the possibility of any air remaining. Good hard, high pedal. Left overnite. Next morning, pedal was still the same, so removed Gclamps etc, fitted links and boots, bolted wheel cylinders back onto backing plates, refitted shoes, springs drums. Still a good hard pedal. Left overnite.... This morning still the same, so refitted wheels, took car for a spin; pedal goes to floor. Only the rear brakes would lock up on my gravel driveway. Back home, attempt to bled brakes; no air is coming out, only fluid. If I clamp visegrips on the rh hose, pedal is high and hard. This indicates to me that the rh cylinder, I dunno, seems to be sucking air in somewhere. Again, no sign of leakage anywhere. This rather long narrative is really a very condensed account of what I've been attempting for the past two months. I am sure that James at Gotham City could supply 'decent' cylinders, but it is impossible to get anything from the US of late [no planes]. Or....have I diagnosed this incorrectly? Bear in mind, my car is RHD; the brake line Tee's off off the RH side to the RH wheel before continuing around to the LHS
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05-28-2020, 01:30 AM | #2 |
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Re: brake problem
Using 39 pedal assembly, and yes, I have a bit of free travel before pushrod contacts end of m/c piston
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05-28-2020, 01:59 AM | #3 |
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Re: brake problem
Is everything adjusted properly?
Do you have a cracked brake drum, let a friend brake and put you hands on the drum. Problems withe the bake hose ,let a friend brake and put you hands on the brake hose. Switch the cylinders left to right, and see if the fault follows the cylinder. |
05-28-2020, 05:05 AM | #4 |
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Re: brake problem
Possible need of residual valves ?
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05-28-2020, 07:01 AM | #5 |
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Re: brake problem
A while back some brake cyls were made wrong, something about the bleed or return hole in the wrong place...............
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05-28-2020, 08:04 AM | #6 |
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Re: brake problem
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In a similar situation with a dual master cylinder installed the solution was to install 'Speed bleeders' and bleed accordingly. This may or may not work but may be worth a shot. Why are you using 1/4" brake lines??
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05-28-2020, 10:13 AM | #7 |
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Re: brake problem
What kind of Bendix brakes?
What adjustment procedure are you using? Anchor pin adjusted to center the shoes? Adjust the brakes tight and see where the pedal goes. |
05-28-2020, 01:20 PM | #8 |
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Re: brake problem
Brake drums not cracked, they are nos
Residual valves? Why? isn't the residual valve built into the m/c? And, having the remote reservoir mounted up on the firewall actually adds a slight 'head'. Brake cylinders made wrong? Yes, I am convinced these w/c's are wrong. Only way I can bleed all air out, is to unbolt from back plates, whilst still attached to hoses, G clamp across ends of cylinders to prevent pistons popping out, and 'manipulating' them into such a position as to get all air out. Re-assemble everything, still good. Drive the 'beast' and upon first application of brakes, pedal goes to floor! Single circuit, Lockheed style m/c with 1 1/16 bore. Why 1/4" lines? Dunno, ask Henry Ford. Speed bleeders could be a bit hard to get out of the USA right now, I have, during all my efforts, wrapped thread tape around the threads of all the bleed nipples. 39 Lincoln brakes Yes, have set all shoes hard out against drums and set handbrake, and had good hard, high pedal. Then, when I drive this thing and apply brakes, pedal goes to floor. Repeated pumping brings about a spongy pedal that still goes to floor. Much angst!!
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05-28-2020, 03:34 PM | #9 |
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Re: brake problem
NOS does not mean Not Cracked.
Have you checked them? |
05-28-2020, 03:44 PM | #10 |
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Re: brake problem
Not all mc have built in residual valves . But i understand your arrangement and the remote fill should work . I would remove the wheel cyl in question and disassemble to inspect the bore , cups and machining .
I just went through a similar, no pedal , on a 30 with juice brakes . All i did was replace some flex lines , bleed and results were a mushy pedal . After much frustration and pulling of my hair . I installed residual valves and problem solved . Mind you this same setup worked for 10-12 yrs until i changed the lines . |
05-28-2020, 04:03 PM | #11 |
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Re: brake problem
Cylinders The problem with the repoped ones was the inlet hole was larger than stock and the cup straddled the hole so when new linings were used the cup was bushed back over them ,My current brake job one wheel had that problem .solution grind a bit of the end of the shoe 3/32 ,
Last edited by FlatheadTed; 05-28-2020 at 06:34 PM. |
05-28-2020, 04:07 PM | #12 |
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Re: brake problem
"Only way I can bleed all air out, is to unbolt from back plates, whilst still attached to hoses, G clamp across ends of cylinders to prevent pistons popping out, and 'manipulating' them into such a position as to get all air out."
Brian, that is not a usable part or bleeding process. I know you were just attempting to get it bleed, but over time you don't want to be disassembling the whole brake system every time in needs to be bleed. You need good quality wheel cylinders, but no idea where they would come from in England! |
05-28-2020, 04:08 PM | #13 |
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Re: brake problem
Displacement Mismatched m/c or pipes to large ,1/4 is ok .
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05-28-2020, 04:38 PM | #14 |
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Re: brake problem
Take apart wheel cylinders and inspect to see if holes drilled properly--- the bleeder hole at top, the fluid hole in center---- some have bleeder hole drilled 1/2 way down, some fluid holes drilled to be under cup, I always take apart new wheel cylinders-- and rebuilt ones for inspection, the new ones many times have the holes drilled wrong, the resleeved ones have honing grindings not cleaned out
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05-30-2020, 07:00 PM | #15 |
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Re: brake problem
what did you find brian? i know you are not sitting still !
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05-30-2020, 08:05 PM | #16 | |
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Re: brake problem
Brian is in New Zealand thats about 1.1/2 hrs from Australia about 14hrs from the USA and about the same from England ,Don't forget We have always supported the USA ideals , fought in support in the war ect ,
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05-30-2020, 08:08 PM | #17 |
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Re: brake problem
Yep, need to stay awake here!!
Last edited by JSeery; 05-30-2020 at 09:16 PM. |
05-30-2020, 08:19 PM | #18 |
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Re: brake problem
Thanks , No offence meant Jerry ,
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05-30-2020, 09:22 PM | #19 | |
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Re: brake problem
Quote:
Not that many Americans realize that what good allies Australia and New Zealand are.They have always been there for the US. Thanks from a vet.
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05-30-2020, 09:27 PM | #20 |
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Re: brake problem
This was not intended as an internal incident, just a stupid mistake! For some strange reason I was thinking Brian lived in England (I know, it says New Zealand right under his name!). And on top of that I knew Brian lives in New Zealand, just one of those things, doing too many things at once.
And I still think he needs new (as in correctly built) wheel cylinders! LOL Last edited by JSeery; 05-30-2020 at 09:32 PM. |
05-30-2020, 10:04 PM | #21 |
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Re: brake problem
Actually, I haven't been sitting still; just been doing other things [Ford V8 flattie related] for other people. Having a break [brake lol] from this little dilemma. I have had quite a few fellows tell me my master cylinder is the offending item; this I doubt, however, I am going to remove a mates master cylinder from under his 39 Mercury [a known good cylinder], and swap into my car. Process of elimination....
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05-31-2020, 10:10 PM | #22 |
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Re: brake problem
Maybe try it without the hose and remote reservoir hooked up.
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05-31-2020, 11:13 PM | #23 |
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Re: brake problem
Today noticed wet spots bottom of both front backing plates. So front cylinders are leaking. Chinese rubbish bought from Summit. I have a wanted advert in the swap meet section. If anyone can suggest where to get decent front cylinders, I'll appreciate it.
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06-01-2020, 12:43 AM | #24 |
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Re: brake problem
Before shipping across the ocean take a look at what you have...usually when leaking nowdays is when honing is either out of size or to coarse.
If it´s to coarse you can fix that put in a new set of cups and be on the road. |
06-01-2020, 01:45 AM | #25 |
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Re: brake problem
DOT 3 or DOT 5?....
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06-01-2020, 02:09 AM | #26 |
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Re: brake problem
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And if the bleed was not quite at the top, would it be possible to fill the offending air gap with epoxy?
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06-04-2020, 06:08 PM | #27 |
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Re: brake problem
Update; I bought locally some new 1 1/8 cups. replaced the cups in the front wheel cylinders with them. The new cups measure approx .025" bigger than the Chinese things. I think the problem is now resolved...raining here [lovely winters day], so have not road tested.
I wish to thank everyone who contributed with ideas, that's what makes this forum so great! A wealth of knowledge.
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06-04-2020, 06:49 PM | #28 |
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Re: brake problem
Fingers crossed thats it Brian!
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06-06-2020, 06:31 PM | #29 | |
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Re: brake problem
Quote:
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06-06-2020, 06:45 PM | #30 |
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Re: brake problem
At one time you could purchase just the cups by diameter. Ebay seems to have them as well as some brake specialty suppliers. https://americanbrakecorp.com/wheel_...bber_cups.html
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06-06-2020, 06:58 PM | #31 |
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Re: brake problem
Thank you, this helps a lot.
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06-06-2020, 07:28 PM | #32 |
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Re: brake problem
I'm in New Zealand, so unable to assist you in advising where to purchase rebuild parts. Let me tell you this...sign of the times...I too had trouble sourcing these components which were so readily available in years past. Everything today seems to just be catering for the throwaway society...people no longer rebuilt stuff, merely replace their worn out 'old' stuff with the latest and greatest new version.
My latest 'issue' with this job is the brake linings the franchised brake specialist bonded onto the shoes I supplied. Some sort of black lining, very dusty, and the dust sort of smears over the lining as a crusty glaze. I've sent them back and they can put something decent on... When the 35 still had mechanical brakes, I got the local garage [who have a brake dept], to bond some new linings onto my shoes. Same bloody stuff!! and I had no brakes!! Absolutely no braking effect, lots of pedal, but no retardation. And, it heated the drums so much that the powder coating on my wheels melted. I ended up supplying old style woven asbestos linings and they re-did the job. [charged me again too, the mongrels!!] Just so hard to source quality parts anymore....
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06-06-2020, 08:38 PM | #33 |
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Re: brake problem
How long ago was that Brian, thought they were really against asbestos, in Australia at least, from the import stories posted on here?
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06-07-2020, 02:17 AM | #34 |
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Re: brake problem
There are plenty of good friction material available...just have to ask the right questions buying it and not from a modern brakeshop...
It´s become real difficult to find a modern material for rivetting though. For bonded material look for industrial...elevators still use drum brakes. High friction is what we want...longevity is secondary. |
06-07-2020, 02:20 AM | #35 |
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Re: brake problem
Bonded is normally bad, although i had bonded stuff that was like cardboard. It had heaps of grip & made for amazing brakes. Last 10 months and it was worn out.
I then went to the truck shop & asked for woven lining. TLR Truck shop woven lining comes at a price but is.. worth it?
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06-07-2020, 02:32 AM | #36 |
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Re: brake problem
JSeery, Yes, the Aussies are really down on asbestos. Here in NZ we can still import a car without every component being stripped down to check for the dreaded asbestos, unlike our cousins across the ditch.
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06-07-2020, 01:19 PM | #37 |
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Re: brake problem
That's good. I would not be happy with someone else dismantling my vehicle!
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06-07-2020, 07:41 PM | #38 |
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Re: brake problem
Yes its happened to one of our Ford Barn members and a friend who just lives around the corner from me. I'll let him tell the story , but to add insult to injury he also received a fine, let me tell you it wasn't small..
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06-07-2020, 08:04 PM | #39 |
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Re: brake problem
Yes that was me , i imported a 34 5w from south africa , i had asked the elderly gentleman 80 year old who i bought it of to remove the brake shoes of the car and remove clutch plate , Which he did , but he put them in a cardboard box and left them in the car as he thought i would need them again, any way when the car cam into Fremantle Australia , border force went thru it , they wanted a independant asbestos company to check for asbestos , to cut a long story short , it took 4 weeks of fucking around with asbestos companys and border force , i was charged for asbestos inspection fees , removal fees , recheck fees ,storage fees from container company , storage fees from border force , and then a fine from border force for importing a car into australia with asbestos, total was $12000 aussie $$,i went to my local member for parliment , and they said we cant go against another gov department and told me to pay the fine , fuck the government and there asbestos crap
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06-07-2020, 08:37 PM | #40 |
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Re: brake problem
I feel for you Phil...Aust $12,000 !! did they find the asbestos in the head gaskets? What a dangerous car you imported!!
It's way over the top isn't it? I enquired to our NZ Customs if I could import asbestos brake linings- NO WAY!! About three years ago I purchased a NOS cluster on eBay off an American seller. I got him to send it to an American forwarding outlet that works in with NZ Post. They refused to send it to me because it had Cosmoline on it. I had to supply MHSD information, lots of toing and froing, said they'd destroy it at no charge to me, alternatively return it to the vendor at half the price it would have cost to send to NZ. I got them to send it back to him, told him to keep it. Unfortunately, this is all for our personal safety you understand?
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