Pressure plate question

[thedsmguy]

I have a couple plates that i took to a shop to have resurfaced. Both had a bevel on friction surface that was lower in the middle. Is this how a clutch comes? Does it "flatten" out when being used? And if so is it even possible to resurface such a thing? Right now it seems it would wear a disk in a weird way but the disk pulled seemed pretty flat still.

 

[mitsuturbo]

Naw man, you should be able to put a straight edge across the surface and it should be dead flat.

Instead of having mine resurfaced, to keep the clutch geometry better in spec, i took a new (cheap) pressure plate in with my old 2600 that had cracks in the friction surface, and had them put the new friction plate on it. Worked great for a few years.

 

[thedsmguy]

Great idea

 

[transparentdsm]

what are the negative effects of the PP being high on the outside and low on the inside? because once the throw-out bearing presses the teeth on the PP won't that make the friction surface completely flat once again? i have no idea on this subject and would like to know so i can be more knowledgeable.

 

[mitsuturbo]

The friction surface is cast iron, if i'm not mistaken. That sh*t's not going to flex. It's going to wear out the the friction disc unevenly.

 

[JNR]

Don't underestimate heat and is effect on materials!

 

[4thStroke]

Quoting transparentdsm:
what are the negative effects of the PP being high on the outside and low on the inside? because once the throw-out bearing presses the teeth on the PP won't that make the friction surface completely flat once again? i have no idea on this subject and would like to know so i can be more knowledgeable.



If the plate is dished (warped), it will not clamp the friction disc properly, t won't be making full contact with the friction disc. This happened with my twin disc. If with the twin, I was blowing through the clutch right around peak torque, 450ftlbs or so.