quote:Originally posted by PanteraDoug:
The ONLY sure way to determine 100% release of the clutch disc is to use feeler gauges and measure the clearance....I think it is .035" for the three finger and .045 for the diaphragm.
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As BW says, everything is so freakin' tight with adjustment on the Pantera for clearance, a simple change like the disc thickness or a change to a disc with more Marcel can change everything....The original Pantera disc had the Marcel removed to add clutch travel to make it work.
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and not to be argumentative Chris, that isn't my intent but I seem to remember the full new disc thickness as right around 3/8" or .375 to .380 with the micrometer WITH a full Marcel disc.
I don't have an "original" clutch disc here to measure but it would make sense to me that without Marcel it might be right what you said at around .280"?
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For those who don't know. The wavy line that runs through the center of the disc (arrow pointing to it) is the Marcel spring. It helps push the clutch apart when releasing and was eliminated in the original factory installed disc to gain room for the clutch assembly height.
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I would not think it is the "thickness" of the clutch that matters that, but the amount the marcel compresses when squeezed by the pressure plate. this small amount of compression becomes greater at the Tob due to the lever ratio of the fingers. thus that is the value I think the clutch maker should tell you.
as for wanting to have 0.040" clearance when fully disengaged, the lever ratio of the fingers will make the needed ToB travel even more. that is another value I think the clutch maker should provide.
I think I have seen a ratio of 6:1 being a norm, so out of the 0.46" ToB stroke available, subtract 0.240" ( 6 X 0.04) for full desingaged and the desired 0.1" intial travel of the slave when first depressing with would be 0.06" at the ToB, that only leaves 0.16" to decompress 0.025" worth of marcel
