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Old 12-03-2014, 01:00 PM   #99
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So air is now heavier that fluid?
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Old 12-03-2014, 02:17 PM   #100
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What a crazy design not to put a bleed valve on the one caliper. Are all their dual caliper discs designed this way or only us Classic owners lucky?
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Old 12-03-2014, 02:24 PM   #101
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Old 12-03-2014, 02:41 PM   #102
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So air is now heavier that fluid?
I guess Dexter air is heavier than fluid..........
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Old 12-03-2014, 02:42 PM   #103
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I have ordered the 2lb residual valve. We'll see.
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Old 12-03-2014, 03:31 PM   #104
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I have ordered the 2lb residual valve. We'll see.
Let us know.....I'm struggling with 2psi X the surface area of the four pistons = how many pounds of apply force? What's the drag, heat buildup and wear factor. There are no balancing retraction springs on those pads/calipers.
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Old 12-03-2014, 03:37 PM   #105
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If at all possible bleed the actuator WELL before tightening the output line.


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Old 12-03-2014, 03:40 PM   #106
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A two PSI RPV should not cause any appreciable drag unless it is behind another 2 PSI valve already in place in the actuator, I seriously doubt there is one already in the actuator.


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Old 12-03-2014, 03:45 PM   #107
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A two PSI RPV should not cause any appreciable drag unless it is behind another 2 PSI valve already in place in the actuator, I seriously doubt there is one already in the actuator.


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I'm not sure how to measure "appreciable drag" in terms of wear and temp, but if you think about it:

If the gravity force of a column of fluid in a street rod, whose MC is lower than the caliper, has enough "suction" to retract the piston and make a low pedal, then 2 psi will surely keep the pads in constant contact with the rotor, overcoming the retraction and gap between rotor and pad caused by normal hub/bearing/rotor runout. I'm not saying it's a bad idea....I'm just not sure it's worth the tradeoff for me.
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Old 12-03-2014, 03:52 PM   #108
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Would not a Mityvac help?

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Old 12-03-2014, 03:56 PM   #109
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Would not a Mityvac help?

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No, Bob. No matter how hard the mighty vac pulls, it'll never pull the air from the top to the bottom of the inner caliper half, through the connecting line, in order to let it rise to the bleeder.
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Old 12-03-2014, 04:04 PM   #110
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Let us know.....I'm struggling with 2psi X the surface area of the four pistons = how many pounds of apply force? What's the drag, heat buildup and wear factor. There are no balancing retraction springs on those pads/calipers.
Rich,

All I know is you could not feel any drag on the wheels on the cars with them lifted off the ground and rolling them by hand. I did this many times aligning front ends. Actually, a semi-tight adjusted drum brake had more drag, as I remember.
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Old 12-03-2014, 04:08 PM   #111
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Rich,

All I know is you could not feel any drag on the wheels on the cars with them lifted off the ground and rolling them by hand. I did this many times aligning front ends. Actually, a semi-tight adjusted drum brake had more drag, as I remember.
OK, you're the guinea pig then?
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Old 12-03-2014, 04:09 PM   #112
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If at all possible bleed the actuator WELL before tightening the output line.


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J.M.

What I did the first time when I replaced the Actibrake with the Dexter was lifted the tongue of the trailer as high as I could get it, changed the unit, then bled the unit to the first junction in the brake line. Think it was at the "T", and the delay was no longer, or shorter than with the Actibrake.

I'll need to get a short section of brake line to install the valve.
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