Weep at the reservoir after flushing the brakes - BMW Luxury Touring Community
 
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post #1 of 6 Old Dec 6th, 2014, 12:45 pm Thread Starter
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Weep at the reservoir after flushing the brakes

Hello
I have just changed the brake fluid as described in different threads.
Not easy but feasible.
Tried the bike; everything OK.
One little issue.
The fluid weeps (slightly) between the cover and the reservoir of the hand brake.
The level of the fluid is not high; between minimum and middle.
I am considering putting just a little RTV silicone
Any better idea?

By the way I was asking to myself how is this reservoir vented?

Thanks for the help

Bruno

Bruno_C
K1200 LT 2006 85000km
Moto Guzzi Breva 750 2004
Triumph Bonneville 1972
Norton Commando 1976

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post #2 of 6 Old Dec 6th, 2014, 1:37 pm
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Re: Weep at the reservoir after flushing the brakes

I noticed the same thing on my K1200LT and it occurred each time after I had removed and replaced the cap for what every reason. I would wipe it and it would return. After I picked up the R1200RT I even noticed the same thing but had already figured out what it was from the K1200LT.

I think it is just residual fluid on the reservoir, the cover, the gasket or all three. It would stop and stop even quicker after I washed the motorcycle. Not just cleaned the reservoir but washed motorcycle with soapy water.

Chris Ehlbeck
2002 BMW K1200LTE Toscana Green Retired with 85,391 miles
2014 BMW R1200RT Quartz Blue Metallic

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post #3 of 6 Old Dec 6th, 2014, 4:44 pm
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Re: Weep at the reservoir after flushing the brakes

There is a rubber diaphragm that seals the reservoir. It often has moisture on the outside and , of course, brake fluid on the inside. I always remove it from the lid and wipe it fully dry before I re-install. If you did not loosen and level the reservoir prior to setting the fill level you will get a small amount of push out when you re-install the lid/diaphragm combo. Just wipe it down and it should not reoccur. The diaphragm seals the unit but allows for fluid movement. The level should never change unless there is a problem since it only goes to the ABS unit and no further (unless you have a 99-2001 with ABS II)

John
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post #4 of 6 Old Dec 6th, 2014, 5:02 pm
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Re: Weep at the reservoir after flushing the brakes

DOT 3 & 4 brake fluid is soluble in water so keep wiping the the reservoirs with a wet rag after any service to catch tramp leakage. A general water wash down of the whole bike is good also, to wash away drips etc...........
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post #5 of 6 Old Dec 7th, 2014, 9:11 pm
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Re: Weep at the reservoir after flushing the brakes

I had that happen when I installed my Ram mount reservoir cover last year. Just keep wiping it with a wet rag. Its just residual fluid from the seal.

2004 K1200LT. Big Mama
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post #6 of 6 Old Dec 8th, 2014, 4:54 am Thread Starter
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Re: Weep at the reservoir after flushing the brakes

Thank you all
I will wash it with soapy water and keep cleaning.
The gasket is in good condition so there is no reason it leaks.

Thanks again

Bruno

Bruno_C
K1200 LT 2006 85000km
Moto Guzzi Breva 750 2004
Triumph Bonneville 1972
Norton Commando 1976

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