Pete Moe

Thanks for the rapid response to all! And now I see the difference in the Cirrus model master cylinder. I’m so new here I don’t know how to pm Aerodon! I would like to talk to you about your 10-24D’s.

Hi all, my first post on Mooneyspace. I have a similar problem to Gary Edson. My airplane is a 1979 M20K (N231TH). The left brake went spongy over time. I have the Cleveland 10-24D master cylinder. Bought a $16 rebuild kit from Lasar, then removed the offending master cylinder. The plunger rod has rough scoring in it as shown in the attached pic. I rebuilt it anyway but of course the pedal is still soft. Roughly $3,000 for a replacement master cylinder is all I can find online. Does anyone have a used 10-24D? Also, there’s a few 10-24C’s for sale (a Cirrus part). The pictures look very similar to my master cylinder. Is the Cirrus part compatible? I just sent a message to Don Maxwell and hope for a quick response. Obviously I don’t want to shell out the $3,000, so I thought I’d throw it out to the pro’s and see if there is a better answer.