Leaking brake fluid

[billy hellcat]

Anybody have brake fluid leak from belly?  Took off panel on belly and can't seem to see where it is leaking.  Pumped the brakes a few times and still can't find the source.  Just wondering if it's a known issue.  1999 ovation.  Thanks

[Fritz1]

take the panel below the master cylinders off to see if anything is dripping, chances are the O-rings are leaking, I resealed the pilot masters on my 2000 Bravo this summer, same story, most important thing to do after reseal is to submerge the cylinders in 5606 and pump them back and forth a gazillion times until absolutely no bubbles come out, then fill the system from the bottom and connect the masters without introducing any air

[Aerodon]

There is a long line from th brake master cylinders to the reservoir behind the baggage compartment.  Mine was leaking at the front T.  Any brake leak will find its way to the drain on the removable belly panel.

[tls pilot]

parking brake

[LANCECASPER]

There are some decent kits available to rebuild yours if that's where it's coming from:

https://planepartsinc.com/store/mooney-m20j-m20m-brake-master-cylinder-kit/

https://www.gallagheraviationllc.com/Marsh-Brothers-Cleveland-Brake-Master-Cylinder-UpgradeRepair-Kit_p_329.html

 

https://planepartsinc.com/store/880040-501-800029-501-mooney-m20j-m20l-m20m-parking-brake-valve-kit/

[skykrawler]

I have replaced a leaking (steel braided) hose from the tee fitting to the input of the master cylinder.  Amazing, virtually no pressure on that hose.

Red fluid appeared again this year - deferred until annual.  The right master cylinder seems to be leaking around the rod.    The J models had several different parts numbers for master cylinders each with a different internal parts.  My airplane as Cleveland 10-49 master cylinders - Lasar sells a kit, or you can just buy the o-rings.  In the picture the small o-ring seals the shaft.

 

[billy hellcat]

thanks for all the replys