Thanks for everyone's comments. I am trying to "soak up" all this experience. If I find the 10 1/2" pressure plate that I want, how do I determine if it is standard duty or HD. Count springs, color of spring make difference, other?
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Click on the link in post #10 of this thread. http://forum.studebakerdriversclub.c...pressure+plateOriginally posted by jozek View PostComment
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The Studebaker Shop Manual details the tension of each color spring.
But the first thing to look for is the Number of springs in the Pressure Plate. The 10 1/2 Inch Borg & Beck "Clutch Cover" as it is called should have holes for 12, but a non-Avanti or Truck 259/289 only uses 9 of the holes and would be less Pressure, usually under 1000 Lbs.
You guys can use the weak ones if you want, I use the strongest ones with through the floor Pedals without an issue, (different strokes I guess!).
My Transtar is 3450 Lbs. and has a 12 Inch Clutch.StudeRich
Second Generation Stude Driver,
Proud '54 Starliner Owner
SDC Member Since 1967Comment
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Per the 1959-1964 Shop Manual, the PSI for 10.5" diameter, V8 pressure plates ranges from 1456 to 1784, with 1784 being for JT w/4 speed. The referenced AMC part, supposedly is 1800 PSI, so it should be more than sufficient, though I'd prefer something closer to 1500 PSI.Originally posted by StudeRich View Post
A person can run 3450 PSI, or something out of a freight train if preferred. But for the (extremely few) Studes that are actually driven regularly, a PP within stock spec is gonna work out better for several reasons, as already mentioned above.Last edited by JoeHall; 11-29-2014, 05:11 AM.Comment
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Anyone have a picture or part # for the levers that need spot welding?Comment
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It is the ears that push the t/o bearing forward. They are located on the shaft that runs through the bell housing. When the shaft rotates, those ears rotate forward. They often break loose from the shaft, especially with HD clutch setups.Originally posted by brian6373 View PostComment
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The hint by ed ellis (welding the linkage) is very appropriate - I had one of the arms (the one on the clutch throw-out bearing shaft) break loose. welded it, plus the two "fingers" on the clutch shaft (that press against the throw-out brng). Also check for cracks/breaks at the retaining pin hole - one of mine was cracked at that point. Fifty-sixty years of push/release can fatigue a lot of parts.
Paul TKComment
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Thanks to all for your comments! I have bought a 10.5" pressure plate, spot welded the TO brg levers and resurfaced the flywheel. I am shopping for a 10.5" clutch disc, at a reasonable price. Has anyone used a Sachs SD4187 disc? It has all the specs of the factory disc, but the outer spring circle on the flywheel side appears larger than my flywheel recess. I haven't found one locally to measure it.Comment
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Anyone have access to a Brog & Beck application list?
As I mentioned in post #11 I have a pressure plate I once cross referenced to a 1964 327 from an Impala but now I can't find any information. The stamped number on the pressure plate is 1505 and the closest I can get is the one for a Jeep, 01-505, not that the specs are the same as I can't find them, but just the numbers.
Just need a better pressure rating so I know what to do with the throw on the levers or to leave them at stock length.
Thanks, Len.Comment
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Below is a reply I received about my 1505 pressure plate. Just to be clear the 1505 has 9 springs and the 1506 has 12. Len.
According to the Arrow Manufacturer's book on these items, the number 1505 was replaced by 1506. This assembly is listed as 1505 but they are interchangeable.
The Book says - AMC 1964-1965 232 Engine Torque Command Series / 8 cylinder engines 327 343 360 390 287 290, Chrysler Products 1957-1979 8 cylinder Engines - 360 Newport RC3, Hobart Products 1958-1974, Hudson 1957 8 cyl Hornet, Taxi, H.D., Jeep 1976-1979 258 Engs. CJ Series / 1972-1977 258 Engs. Cherokee and Wagoneer 1972-1975 258 Engs. Commando, Jeepster, Univeral 1966-1971 Gladiator and Wagoneer 1963-1965 Eng. J-100 Wagoneer 8 Cylinder Engines 304 360 304 327, G.M. Family 1957-1965 8 Cylinder Models, Nash 1957 Ambassador 5780 Rambler 5730 (Large V-8), Studebaker 1964 8 Cyl Eng. AvantiComment
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