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Posted by: mrgjones Apr 3 2011, 06:35 PM

Spent the weekend rebuilding all four calipers on the 74. When they went back together the adjuster screw on the passenger side gave up the ghost and refuses to tighten. As a result I'm losing brake fluid through the threads there. Also am able to bleed the lower valve only on both rears. As per the Pelican article I am bleeding the lower first then the upper. Suggestions? Does anyone know the size of the adjuster screw or where I can get another one? If anyone has an idea of what's happening with the upper bleeder valve I'd appreciate that input as well. Thanks

Posted by: Eric_Shea Apr 3 2011, 07:14 PM

Its a thin 13mm shoot me your address and I'll send that and an o-ring.

Posted by: rick 918-S Apr 3 2011, 07:15 PM

Where did you get your kits? The ones Eric Shea sells have the proper "O" rings. Two for the caliper halfs, one for the E brake arm shaft and one for the adjuster shaft. The one for the adjuster shaft is tiny but durable. Change the "O" on the shaft and try it again.

Here are a couple of the How To's here in the Classic Forum.

http://www.914world.com/bbs2/index.php?showtopic=24229

Be sure to set the piston angle on the front calipers correctly.

http://www.914world.com/bbs2/index.php?showtopic=114360

And make sure the rears are adjusted correctly.

http://www.914world.com/bbs2/index.php?showtopic=90625

Posted by: 914 shifter Apr 3 2011, 07:19 PM

PMB has great rear caliper rebuild instructions with pics on facebook

rear outer adjuster has a lock nut, and small circlip. locknut needs to be

adjusted as you tighten the adjuster

Posted by: mrgjones Apr 3 2011, 09:20 PM

It looks like its actually the allen bolt inside the 13mm that has lost a thread midway down. Love to pick up one of those and the o ring if you've got them. Thanks

Posted by: mrgjones Apr 3 2011, 11:17 PM

Here are a couple of the How To's here in the Classic Forum.

http://www.914world.com/bbs2/index.php?showtopic=24229

Be sure to set the piston angle on the front calipers correctly.

http://www.914world.com/bbs2/index.php?showtopic=114360

And make sure the rears are adjusted correctly.

http://www.914world.com/bbs2/index.php?showtopic=90625
[/quote]
I searched for these threads but didn't come across them on my own. Thanks for posting the links for me. Eric's instructions are complete gold.

Posted by: Valy Apr 3 2011, 11:38 PM

Take the caliper off. You'll need to remove that piece of shredded metal from it any way or it my find its way between the piston and cylinder. You'll also need to fix whatever you broke

Posted by: mrgjones Apr 4 2011, 07:57 AM

Take the caliper off. You'll need to remove that piece of shredded metal from it any way or it my find its way between the piston and cylinder. You'll also need to fix whatever you broke
[/quote]
Hahaha. I don't think the adjuster screw thread is going to work its way into the caliper any time soon since the whole thing is hemorrhaging brake fluid ergo her wings are clipped. Unless somebody's got a part from an old core I may have to end up scrapping the whole caliper.

Posted by: Eric_Shea Apr 4 2011, 08:02 AM

I have the inner adjusters. Dems ain't free though

Here's something to consider if you have the tool set:

If you have an 8x1.25 die you can mount that inner adjuster in a vise by that flange. Run the die up and down until it rides smoothly and you should be good to go (unless that 4mm hex is stripped)

If that hex isn't stripped that should solve your problem. Give me a call this morning and we'll put together a care package to get you running. Follow the banner below for the number.

Posted by: mrgjones Apr 4 2011, 04:24 PM

Should be all sorted. Talked to Eric this morning and he's sending me out the stuff I need to rebuild the caliper right. Thanks everyone for the expertise.