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Workshop => Suspension and Chassis => Topic started by: evaneyeball on February 15, 2020, 02:51:27 AM

Title: master cylinder not working
Post by: evaneyeball on February 15, 2020, 02:51:27 AM
i have just rebuilt my front brake master cylinder. i bought a new piston/spring and gaskets. i used them for awhile but then needed to powder coat it so i took it apart completely all plastic and rubber out of the body. then sand blasted and powder coated. when i went to put it back together and bench bleed it it would just not compress the fluid and push it through the hose. could the gaskets be bad? i did just replace the whole thing. it all has one ride on it. and before the front brakes were a bit squishy but still locked up and worked. i didnt care abut it and stilll dont care if theyre squishy. but they need to work. any ideas and appreciate any advice.
Title: Re: master cylinder not working
Post by: croat1 on February 15, 2020, 09:54:26 AM
Possibly something was damaged when you reassembled??? Are you still using the oem hoses?

Joe
Title: Re: master cylinder not working
Post by: evaneyeball on February 15, 2020, 04:23:11 PM
am still using oem hoses. and i checked everything out and it looks to be ok.
Title: Re: master cylinder not working
Post by: broken1 on February 16, 2020, 10:29:00 AM
When you tried bench bleeding did you have the end of the hose opposite the master cylinder submerged in fluid? I bled my brakes from the calipers after I rebuilt them & couldn't get fluid through to calipers until I submerged the bleeder line in a jar of fluid. I heard of guys pushing fluid into the brakes from the calipers but haven't tried doing it that way yet.
Title: Re: master cylinder not working
Post by: evaneyeball on February 16, 2020, 01:27:17 PM
i have tried bleeding with the opposite end of the hose and with brake fluid and not brake fluid and neither worked. but i took it apart again and found some parts of a rag down in the barrel of it and havent tried bleeding after that because i had my whole front end apart and its hard to keep the rotor in the calipers without it all being together. but got it together last night and i will try it again today
Title: Re: master cylinder not working
Post by: evaneyeball on February 16, 2020, 11:37:26 PM
Never mind i got them to work it just took alot of tapping the brake lines.