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Old Jul 4, 2012 | 05:46 PM
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Default Bleeding Brakes

Happy fourth of July guys. I'm about to bleed my brakes with the Power Bleeder and wanted to know how much pressure is safe for when I start pumping this thing?
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Old Jul 4, 2012 | 05:58 PM
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There should be directions with the product but I think around 15-20 psi. They work great btw, in case you haven't used one.
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Old Jul 4, 2012 | 05:59 PM
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Here's Motif instructions...


http://www.motiveproducts.com/frame-instruct.htm
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Old Jul 4, 2012 | 07:28 PM
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I use low pressure, like 10 psi. Someone told me high pressure can make air bubbles into a bazillion tiny bubbles. I just go around twice and tap on each caliper. Easy money.
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Old Jul 4, 2012 | 07:37 PM
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Thank you guys for all the help. This is my first time using one of these. I think I'll keep it at around 10 psi as well.
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Old Jul 4, 2012 | 07:41 PM
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One more brake related question, what are the torque specs for the caliper halfs, front and rear? I'm putting these things together right now and need this info asap.
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Old Jul 4, 2012 | 07:49 PM
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Van steel lists the caliper housing bolts as
front 130 (13/16)
rear 60 (5/8)

Caliper mounting bolts
Front/rear 70 (5/8)

HIH
Mooser

Haynes manual says the same

Last edited by Mooser; Jul 4, 2012 at 07:51 PM. Reason: Added second source
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Old Jul 4, 2012 | 07:52 PM
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caliper mounting bolt front---70 ft-lbs
caliper mounting bolt rear----70 ft-lbs
caliper housing bolts front----130 ft-lbs
caliper housing bolts rear-----60 ft-lbs
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Old Jul 5, 2012 | 11:01 AM
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Verify it's not leaking around the cap before you start the process.
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Old Jul 5, 2012 | 11:10 AM
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Originally Posted by TWINRAY
Verify it's not leaking around the cap before you start the process.
How would I do that?
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Old Jul 5, 2012 | 11:23 AM
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Originally Posted by jordan89
How would I do that?
With my Motive bleeder, I've had instances whereby I thought I had the cap of the bleeder fastened correctly to the top of the Master cylinder - yet when I started pumping the bleeder, brake fluid was leaking from the master and the lid. just saying, make sure your lid connection is secure before you start walking around the car to bleed it and then find (later) you've lost a quart of fluid from it leaking out.
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Old Jul 5, 2012 | 11:31 AM
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Originally Posted by TWINRAY
With my Motive bleeder, I've had instances whereby I thought I had the cap of the bleeder fastened correctly to the top of the Master cylinder - yet when I started pumping the bleeder, brake fluid was leaking from the master and the lid. just saying, make sure your lid connection is secure before you start walking around the car to bleed it and then find (later) you've lost a quart of fluid from it leaking out.
I have read about sealing issues with this bleeder and our master cylinders. I think i remember people using a block of wood and, i think C- clamps, to get a tight seal?
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Old Jul 5, 2012 | 11:41 AM
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Originally Posted by jordan89
I have read about sealing issues with this bleeder and our master cylinders. I think i remember people using a block of wood and, i think C- clamps, to get a tight seal?
That's what I use too - still have to make sure you don't get a leak. I saw somewhere else, a Motive bleeder with a aluminum top plate. Mine has a plastic plate with a rubber gasket seal - which the last time I used it, has become "unglued" from the plate and now has to be carefully positioned but with brake fluid, tends to become slippery. I actually had better luck with a manual bleed than with the Motive in getting bubbles out on my '69.
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Old Jul 5, 2012 | 12:33 PM
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I use one "quikgrip" type clamp



I also don't put any fluid in the container, just use the air pressure and need to remember to check the level in the reservoir. Somehow seemed better then ending up with a bunch of fluid in the pump and having to deal with that.

Done that way for a couple of years, zero-problems so far
Mooser
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Old Jul 5, 2012 | 09:37 PM
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Originally Posted by TWINRAY
Verify it's not leaking around the cap before you start the process.
Pump it up to 10lbs dry 1st, if it holds than release the pressure and add brake fluid to the container.
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Old Jul 8, 2012 | 01:43 AM
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All great tips guys. Thank you all.
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Old Jul 8, 2012 | 10:42 AM
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I used mine for the first time yesterday myself. I did have a little trouble with leaking from the Master. But I used a quick clamp like Mooser did (I have the metal plate version) and no further problems. I bled at 10-15 lbs. Next time, I will not even use the bolts that came with the bleeder, just the clamp.
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