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Old 10-27-2002, 06:44 PM
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brake flush

I found several discussions on brake bleeding and flushing, but none included a reference to a question that came up today while trying to flush the system on my recently acquired '82 380SL.

I was using my bicycle pump/schraeder valve equipped master cylinder cap method and started on the rear. As the fluid in the front chamber of the master cylinder got down to the minimum level there was no equalizing of the level from the other (full) chamber. So now I have a full rear chamber and a nearly empty front one and don't see how the front chamber receives any fluid from the fill cap (located on the rear chamber) Who can enlighten me, please? Perhaps I have a blockage between chambers? Thanks.

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Old 10-28-2002, 02:16 PM
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The "rear chamber" overflows into the "front chamber". You must fill up the reservoir as you bleed the brake lines.
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Old 10-28-2002, 03:54 PM
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Yes, that has been my experience as well. On this one I removed as much as I could with a suction bulb and filled the reservoir with fresh fluid up to the "max" line. When I flushed the rear brake the front chamber went down to the "min" line without any of the fluid from the resevoir refilling it. That is when I posted my question. Since then I have removed the resevoir and cleaned it. Using air I get flow to the front and rear chambers so I assume fluid will flow there as well. Perhaps I just need to fill above the "max" line. I appreciate you taking the time to answer my post.

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