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Old 12-02-2014, 11:18 AM   #71
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"To address the other post about calipers becoming stuck.....not multi-piston calipers where pistons are on both sides of the rotor. On those, the caliper is fixed and all motion is in the pistons which compress each pad independently. Single piston calipers slide on the knuckle, or hub flanges. If those sit for an extended period (like years), they can stick and cause h"

I am looking hard at the Dexter axles. The disc brake option they show (3500 lb axle) certainly looks like a single piston caliper that slides on bolts to me. Is that not what Airstream uses also? Is that a reason to avoid the Dexter? Or maybe to buy it since it should bleed fine?
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Old 12-02-2014, 11:22 AM   #72
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Originally Posted by Bill M. View Post
"To address the other post about calipers becoming stuck.....not multi-piston calipers where pistons are on both sides of the rotor. On those, the caliper is fixed and all motion is in the pistons which compress each pad independently. Single piston calipers slide on the knuckle, or hub flanges. If those sit for an extended period (like years), they can stick and cause h"

I am looking hard at the Dexter axles. The disc brake option they show (3500 lb axle) certainly looks like a single piston caliper that slides on bolts to me. Is that not what Airstream uses also? Is that a reason to avoid the Dexter? Or maybe to buy it since it should bleed fine?
Just my opinion, but I would prefer the single piston caliper because they are easy to bleed.
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Old 12-02-2014, 11:40 AM   #73
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Disc brake discussion

The Dexter calipers on my Dexter axles (as mentioned above) are one piston designs that have proven bulletproof over decades.

Not a single failure to report here ever, nothing.


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Old 12-02-2014, 01:17 PM   #74
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Originally Posted by Bill M. View Post
"To address the other post about calipers becoming stuck.....not multi-piston calipers where pistons are on both sides of the rotor. On those, the caliper is fixed and all motion is in the pistons which compress each pad independently. Single piston calipers slide on the knuckle, or hub flanges. If those sit for an extended period (like years), they can stick and cause h"

I am looking hard at the Dexter axles. The disc brake option they show (3500 lb axle) certainly looks like a single piston caliper that slides on bolts to me. Is that not what Airstream uses also? Is that a reason to avoid the Dexter? Or maybe to buy it since it should bleed fine?

The ones used on Classics (and optional on others, I think) in the mid 2000s are 4 piston calipers. Not sure what Dexter uses now. The Classics went back to Electric brakes in 2011 or 2012.

I'd probably prefer a single piston E/H as well. If the 4 piston were executed properly, I'd prefer them, but the single piston would certainly be easier to maintain.
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Old 12-02-2014, 01:26 PM   #75
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It looks like here:

http://dexteraxle.com/i/u/6149609/f/...rake_Flyer.pdf

That 3500# are single piston and >3500# are 4 piston.
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Old 12-02-2014, 01:31 PM   #76
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The pictures in that document show the bleed valves on the top with the supply lines on the bottom on the inner and outer calipers. Is that not what my 2008 Classic calipers look like? Should be easy to bleed all the air out on those calipers. My Classic is 8000 GVWR.

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Old 12-02-2014, 01:38 PM   #77
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The pictures in that document show the bleed valves on the top with the supply lines on the bottom on the inner and outer calipers. Is that not what my 2008 Classic calipers look like? Should be easy to bleed all the air out on those calipers. My Classic is 8000 GVWR.

Kelvin
No, they have the supply fitting on the top of the inner housing, a "transfer line" joining the two halves, at the bottom of the halves and the single bleeder on the top of the outer. Pics don't show the bottom nor the inner half in deatil.
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Old 12-02-2014, 01:42 PM   #78
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http://www.dexteraxle.com/i/u/614960...t_6K_7K_8K.pdf

Note, the axle is uoside down on the floor in these pics.
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Old 12-02-2014, 01:43 PM   #79
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Dexter Axle - Trailer Axles and Running Gear Components - 8K Disc Brake

The bottom pic shows all four fittings pretty clearly.
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Old 12-02-2014, 06:56 PM   #80
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Interesting.. Wonder if actuators can handle 6 brakes? ����
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Old 12-02-2014, 07:14 PM   #81
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Interesting.. Wonder if actuators can handle 6 brakes? ����
Mine does, well sort of.
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Old 12-02-2014, 07:15 PM   #82
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Both my tri axles have 6 calipers, flawless for combined hundred if thousands of miles!
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Old 12-02-2014, 07:33 PM   #83
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Both my tri axles have 6 calipers, flawless for combined hundred if thousands of miles!
Are your calipers the four piston, or the single piston? And what actuators do you have?
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Old 12-02-2014, 08:06 PM   #84
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Playing from memory, I am about sure that there is a Dexter model that will handle six brakes. I am 99% on this.


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