• J3-Cub.com is the largest community of J3-Cub pilots, owners and enthusiasts. With over 1000 active members, we have fostered a vibrant community and extensive knowledge base. J3-Cub.com hosts a library of over 13 years of technical discussions, J3 data, tutorials, plane builds, guides, technical manuals and more. J3-Cub.com also hosts an extensive library of J3-Cub photos.

    Access to the J3-Cub.com community is by subscription only. Membership is only $49.99/year or $6.99/month to gain access to this community and extensive unmatched library of knowledge.

    Click Here to Become a Subscribing Member

    You will also get two J3-Cub decals as well!

Master cylinder leaking

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

grumman41

Well-Known Member
Joined
Mar 1, 2016
Messages
375
Reaction score
32
On the last flight my Right master cylinder lost pressure and "went to the floorboard". I'm going to remove it tomorrow for rebuild or parts replacement as needed.

I don't have a parts diagram know there is a diaphragm inside. Any other parts I should order and replace? Any words of wisdom or dos and don'ts? I have bled these brakes but that's about my experience with the Cub brakes...have rebuilt auto and motorcycle brakes systems.
 

Latest posts

Back
Top