Is this a Thing?, E-Brake ?? Options

[pneuhyde]

So my last 914 had a non-working E-Brake. Everything was hooked up, it just didn't work and because the po had informed me of the situation I just never questioned it. When the body finally rusted away I found a roller to do an engine swap with. One of the things that excited me about this roller was that it had been converted to a 911 5-lug suspension in front and the words "New Eric Shea rear calipers & bushings with 5-lug hubs" jumped out at me.
How cool - Brakes that would actually work like they were supposed to, which to me meant an E-Brake, too. No more hopping out of the car and quickly throwing a rock behind the tire !!!
Well, to my surprise I still dont have a working E=Brake system. I adjusted the cables, then moved on to adjust the vent clearance and found this on the inside
adjuster.
On closer inspection, There appears to be nothing to adjust with behind the plug, and when I rotate the lever nothing inside appears to move and the piston does not extend to push against the disc

The outside caliper adjustement worked just fine,
So - "Is this a thing" to dismantle the e-brake on the inside of the caliper?

[Eric_Shea]

Roughly 1/8"

The missing gear has nothing to do with that amount of travel. The missing gear will allow you to adjust venting clearance to .004". That measurement is crucial especially on the inside adjuster as it is the piston that does all the work. When it is adjusted properly, that piston shoves the pad into the rotor which shoves the rotor into the outer pad which... engages the handbrake.

This is why adjusting your venting clearance is so critical on a 914. This is also why I say 80% of the 914's on the road today do not have functioning rear brake calipers. It's Spring time, time to adjust your rear venting clearance.

[pneuhyde]

Roughly 1/8"

The missing gear has nothing to do with that amount of travel. The missing gear will allow you to adjust venting clearance to .004". That measurement is crucial especially on the inside adjuster as it is the piston that does all the work. When it is adjusted properly, that piston shoves the pad into the router which shoves the rotor into the outer pad.

This is why adjusting your venting clearance is so critical on a 914. This is also why I say 80% of the 914's on the road today do not have functioning rear brake calipers. It's Spring time, time to adjust your rear venting clearance.

Thanks for the reply.
I have two rear calipers, per above picture, that came on a roller I purchased and they were advertised as new (I assume rebuilt and never used by the looks of them) although they have sat for probably 3-6 years.
The pistons do move when energized with compressed air (against a piece of wood between them.
But:
- I don't seem to get a notable inner piston travel from either one when the E-brake arm is rotated - what could cause that?
Other problems with them:
- They are missing the inside adjusters (which I understand can be replaced easily).
- The outside adjuster on one caliper doesn't appear to be causing the piston
to move.
I am quite sure I am going to ship them to you for inspection and/or rework but want to make sure I am not doing so unnecessarily So would appreciate your thoughts on what might cause the problems I am seeing.

Steve