Calipers sticking two months after replacing them. - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 07-02-2010, 04:57 PM Thread Starter
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Calipers sticking two months after replacing them.

So two months ago i replaced the front calipers on my 78 300d. Just recently my Nuetral safety switch went out and my car sat for about a week. After i fixed the nss i took it for a short spin and noticed the breaks were sticking again! I dont know what could cause this, im hoping someone on here will. Thanks in advance for your time!
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post #2 of 6 (permalink) Old 07-02-2010, 10:12 PM
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post #3 of 6 (permalink) Old 07-05-2010, 11:02 AM Thread Starter
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Im not sure honestly. I got this car as sort of a project, mostly just to learn. Is there any way i could test it to see if thats the issue?
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post #4 of 6 (permalink) Old 07-05-2010, 12:45 PM
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I don't know if it is the same situation but I recently had my 72 W108 taken in to replace what I thought was a sticking caliper. Turns out it wasn't the caliper at all but a collapsed brake line that would cause the caliper to stick after a few miles, very much like a damaged caliper. Worth checking out I suppose, hope this helps.

1972 280SEL 4.5 W108.068/M117 V8
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post #5 of 6 (permalink) Old 07-06-2010, 03:18 AM
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brake hoses , traps for young players. this is why the world needs old people...........lol

Last edited by genthree; 07-06-2010 at 03:21 AM. Reason: more info
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post #6 of 6 (permalink) Old 07-06-2010, 06:15 PM
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Most likely the flexible brake hoses have collapsed. They need to be replaced. Use penetrating oil on the chassis connections and let the oil soak in and keep reapplying it to the joint. Then use flare tool wrenches, the ones with the slot at the end, and unscrew the pipe from the hose and then the hose from the caliper. The new hoses have a white line on them so you can tell if it's twisted.

Screw in the hose to the caliper and then route the hose to the chassis mount. Screw in the pipe, using your hand so you don't cross thread the pipe, and then tighten with the toool. Replace both sides and the rear one too.

Bleed the brakes with new DOT 3 or 4, 4 is a higher temperature fluid.

Near Manassas Va. '65 220S, 2006 Ford Crown Victoria Police Interceptor, '99 Volvo V70, '72 350SL 4 speed

Not part of the in-crowd since 1952. It's BRAKES not breaks. You break a bone, use brakes to stop your car. /rant

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