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11-20-2019, 10:17 AM | #1 |
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Clutch restauration, some questions
Hello and good day each other.
I have 4 questions about the restoration of the clutch. 1) The pressure plate was already turned off and honed early lathe. Does anyone know the given minimum / wear measure (thicknes)? I measure 14.1 mm. 2) How thick is the pressure disc plate new? 3) In the pressure plate mechanic I discover different compression springs: red, green, brown; shorter and longer. Does the color coding have a meaning (spring tension)? What is the correct spring length? I measure 56 mm and 51 mm. 4) Under the compression springs in the little pans are round inserts made of plastic. They are very hard and brittle. Is that correct? I thank you in advance!
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Beste Gruesse aus Deutschland, Werner Ford Model A, Roadster, 1928 Citroen 11 CV, 1947 Hercules W 2000, 1976; (with NSU-Wankel Rotary Engine), Canadian version |
11-21-2019, 03:07 AM | #2 |
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Re: Clutch restauration, some questions
Hello nobody here who knows the thickness of the pressure plate and the length of the springs?
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Beste Gruesse aus Deutschland, Werner Ford Model A, Roadster, 1928 Citroen 11 CV, 1947 Hercules W 2000, 1976; (with NSU-Wankel Rotary Engine), Canadian version |
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11-21-2019, 06:57 AM | #3 |
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Re: Clutch restauration, some questions
Never had one apart. I can’t offer much advice other than have you searched here for past posts on the subject?
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11-21-2019, 07:15 AM | #4 |
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Re: Clutch restauration, some questions
Wish I could help. Surely someone will be along soon who knows these well.
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11-21-2019, 08:48 AM | #5 |
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Re: Clutch restauration, some questions
when i had mine apart the fingers were pretty worn and the fly wheel was very cracked on the surface. the old style clutch plate looked like new. I let it be. And adjusted it and run it. Sounds like you need a new pressure plate. the machineing to the one you have was probably a stop gap when replacement was no available.
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11-21-2019, 09:12 AM | #6 |
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Re: Clutch restauration, some questions
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.015 max clearance between drive lug and plate (on last page it gives .005-.015) on the last page, specifications page --spring pressure at 1-9/16 grey---115-120 lbs ---11" clutch blue 125-135 ---10' clutch brown 147-153 9" clutch then back in the text it gives-- spring load (pound feet) ---i B-7563 110-120 BB-7563-B 110-130 74-7563 (this is 60hp, it's built about the same) 135-140 there is no mention of distance if the plate itself won't clean up of .031 from original size replace it (no mention of original size), thought there is a note---if refaces over .020 add shims of the same amount under spring seat set fingers at 3/4", .340 spacer or new clutch disc For the A I am still using the one that came with the car untouched, on the Traction I made the springs into groups that balanced the pressure, made insulating washers out of surplus epoxy circuit boards (I was getting paid to peel the gold off) ---here traction parts are hard to get |
11-22-2019, 02:41 PM | #7 |
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Re: Clutch restauration, some questions
Hello everybody,
today I received nice parts from Bratton's. Also the clutch friction disk. But I have just seen that that is 'Made in China'. I am sceptical. Does anyone have experience with this component? Thanks for good hints! --- Guten Abend Kurt, thank you so much for your helpin' large listing for clutch-springs!
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Beste Gruesse aus Deutschland, Werner Ford Model A, Roadster, 1928 Citroen 11 CV, 1947 Hercules W 2000, 1976; (with NSU-Wankel Rotary Engine), Canadian version |
11-22-2019, 03:22 PM | #8 |
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Re: Clutch restauration, some questions
The one on the left is a good one because it has reinforcing tangs to keep the springs secure. I have one on my car.
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11-22-2019, 03:37 PM | #9 |
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Re: Clutch restauration, some questions
The disc from Bratton's is the one I use. It has the tabs that retain the springs. The disc other vendors sell don't have the tabs.
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11-25-2019, 02:36 PM | #10 |
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Re: Clutch restauration, some questions
Probably I have misunderstood something: The hardest of the 5 different pressure springs has a length of 2.3 inches. When I press these together on 1 9/16" like described above, I measure a pressure of 85 lbs.
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Beste Gruesse aus Deutschland, Werner Ford Model A, Roadster, 1928 Citroen 11 CV, 1947 Hercules W 2000, 1976; (with NSU-Wankel Rotary Engine), Canadian version |
11-25-2019, 04:56 PM | #11 |
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Re: Clutch restauration, some questions
Werner, I think your putting your energy where your likely to end up with trouble. That is one assembly, that in my opinion is better left with the manufacturer. I would never attempt to rebuild a pressure plate or disc.
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11-25-2019, 05:05 PM | #12 |
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Re: Clutch restauration, some questions
If they are built, they can be rebuilt. It might take equipment knowledge and patience that not all of us have but they are rebuilt everyday for trucks etc.
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11-25-2019, 05:36 PM | #13 |
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Re: Clutch restauration, some questions
Russ, what you say is right. But I have to look at it from the other side of the globe. When I buy a restored pressure plate in the USA, I have to return the old one. Overall, the cost of duty + 2 X freight is painfully high.
I do not want to include a reproduction from China. Therefore, I try to restore the existing pressure plate.
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Beste Gruesse aus Deutschland, Werner Ford Model A, Roadster, 1928 Citroen 11 CV, 1947 Hercules W 2000, 1976; (with NSU-Wankel Rotary Engine), Canadian version |
11-25-2019, 09:34 PM | #14 |
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Re: Clutch restauration, some questions
Werner,
If I can find the emails I can put you in contact with a spring manufacturer in Kentucky that makes the correct length and compression springs (pressure wise). If you want just shoot me a PM. Mike
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11-25-2019, 09:50 PM | #15 | |
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Re: Clutch restauration, some questions
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11-25-2019, 11:45 PM | #16 |
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Re: Clutch restauration, some questions
In your country there must be a shop that repairs clutches. It is hard to believe there is not one.
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11-26-2019, 01:15 AM | #17 |
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Re: Clutch restauration, some questions
Werner, the company I buy my clutch packages from don't need your core. Fort Wayne Clutch. Maybe I can help you. If you do buy from the US, and need a core pressure plate, I could send one for you perhaps. I have one I will never use.
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11-26-2019, 04:30 AM | #18 |
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Re: Clutch restauration, some questions
Good morning,
I think I can restore the clutch cage by myself. The pressure plate I can extern turn off at 1/128 ". I can round off the scoring finger levers myself. I have the finger-gauge and a dial gauge, also, I can measure the compressive force of the pressure springs. It is not a big problem to buy suitable pressure springs here. But my problem is that I do not know which spring is the right one, because the built-out have five different dimensiones! It is not certain, but as the balancing holes look like, the clutch plate could have been balanced as a group.
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Beste Gruesse aus Deutschland, Werner Ford Model A, Roadster, 1928 Citroen 11 CV, 1947 Hercules W 2000, 1976; (with NSU-Wankel Rotary Engine), Canadian version |
11-26-2019, 01:16 PM | #19 |
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Re: Clutch restauration, some questions
Since it is a hobby it is good that you like to do your own work. I try to do everything I can by myself and only send out work I know I can not do. You are an inspiration to many I hope. Thank you.
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12-19-2019, 01:52 PM | #20 |
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Re: Clutch restauration, some questions
Hallo und guten Abend!
The fineley gound clutch pressuere plate is just being revised. I found now suitable industrial springs. All movable joints have been coated with PTFE sliding varnish. The assembly is a 96 parts puzzle game for four hands!
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Beste Gruesse aus Deutschland, Werner Ford Model A, Roadster, 1928 Citroen 11 CV, 1947 Hercules W 2000, 1976; (with NSU-Wankel Rotary Engine), Canadian version |
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