Clutch BS

Rick Parker · #1 (**permalink**) 11-11-2014, 01:47 PM

I think you are OK as long as Clutch is releasing properly and allowing smooth shifting. The spring IS to pull the T/O bearing off of the pressure plate fingers. Generally pedal will have about 3/4-1" free travel before beginning to release clutch (when T/O bearing contacts fingers on Pressure Plate).

rodneym · #2 (**permalink**) 11-11-2014, 02:51 PM

Hmmm...
My slave cylinder's compressed rubber boot was the only real 'pressure' riding on the T/O.

Spring and new adjustment...coming up.
Thanks, Rick.

DanEC · #3 (**permalink**) 11-14-2014, 04:45 PM

The slave cylinder in my ERA appears to be spring loaded (against the TOB) although I haven't had a chance to disect one yet. Basically, IMO you need a return spring to counteract the spring in the slave cylinder. I've heard all of this stuff about Ford Mustangs and constant contact with the
TOB (my daily driver is a 2012 GT) but I'm not buying it. My GT definately has some free play at the pedal. If you have a push forward clutch arm, I would want it resting fairly close to the rear edge of the opening with the clutch out, just to be sure I have plenty of room for the stroke to disengage the clutch.

I believe your .022 to .025 inch disc/plate clearance is in the ballpark for a single disc clutch.

It's probably elementary and hate to mention it - but it's important the slave cylinder is very nearly bottomed out in it's bore when the clutch is engaged - in order to have full stroke when disengaging the clutch.

RICK LAKE · #4 (**permalink**) 11-22-2014, 12:53 PM

Depending on which pressure plate you are running the air gap from .28" to .55" clearance with the clutch engaged. More or less you can cause damage to the pressure plate fingers or arms. As far as TOB riding on the pressure plate fingers, some do and some don't. IMO I don't like contact of the TOB on the pressure plate. With a hydro system the piston retracts like your brake caliper on your car. Perwear out will happen if the bearing is rubbing on the pressure plate and the fingers or diapham are not all at the same plane all the way around. I have the ERA setup and have run a pull of spring for 15 years with both single and multi disc clutches. Have not worn out a TOB yet. Side note, recommend that you guys run have a pedal travel limiter. This stops over extending. Rick L.