PeterSchweizer Posted May 14, 2023 Share Posted May 14, 2023 2004 Monaco Cayman 34 ft w/ R4R Chassis. Brakes failed driving into Emission test facility YAKES!!! - used Emergency air Parking brake to stop, get the test (Passed) and drive across the street to investigate the issue further -THAT WAS EXCITING! What I found was that the threaded rod on the brake pedal linkage that goes thru the firewall into the hydro - Max booster had come undone at the pedal. the rod threads into a arm at least 1 1/2 inches into the arm at the pedal/ brake switch and has a jamb nut as well, to supposedly, prevent it from unscrewing. Evidently over the past 5 years and 35,000 plus miles I have owned this fine coach it worked its way out, SUGGEST YOU ALL CHECK YOUR CONNECTIONS AS WELL. I Reinstalled it using a thread lock sealant and added a lock washer. Unfortunately I did not get a pic of the pedal linkage nor the leak at the bottom of the matting surfaces of the master cylinder (the hose is hiding it), however the rear brake reservoir area was very low and the front was full. Filled it up cleaned area static tested it and drove a bit and it is still slowly leaking when you depress the pedal. SUGGESTIONS :? I assume, as it is 19 yrs old and 112,000 miles, the complete Hydro-Max Booster, Emergency elect pump and Master cylinder assembly should be rebuilt ? OR replaced w/ new. However i assume its just the Master Cylinder since its just the brake fluid that leaking and not the power steering fluid section ? What is a good source for the parts or shop for rebuilding? I am in the Phoenix, AZ area THANKS IN ADVANCE FOR YOU ASSISTANCE Peter Also now I have a leak coming from the mating surfaces between the Hydro-Max brake Booster and the master Cylinder Link to comment Share on other sites More sharing options...
Retired Posted June 5, 2023 Share Posted June 5, 2023 Having same issues with leak did you find where to get the parts ? Link to comment Share on other sites More sharing options...
PeterSchweizer Posted June 6, 2023 Author Share Posted June 6, 2023 Jim I sent you a e mail with my cell # call me in am I have some info and a new brake line had to find part issue as well Link to comment Share on other sites More sharing options...
PeterSchweizer Posted June 7, 2023 Author Share Posted June 7, 2023 JIM DID YOU GET MY E MAIL AND CELL # ? Link to comment Share on other sites More sharing options...
Retired Posted June 8, 2023 Share Posted June 8, 2023 Yes will give you a call today thanks Link to comment Share on other sites More sharing options...
Retired Posted June 9, 2023 Share Posted June 9, 2023 Peter helped out greatly know a lot about his motorhome. Thanks again Jim D Link to comment Share on other sites More sharing options...
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