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Any other parts of the air system I should look at? That could be causing the delay in releasing the pressurized air from the brake system? When testing what you mentioned, I ended up removing that glad hand cover to rule out any issues with it

I installed a freshly rebuilt air pack and new master cylinder, and bled all the system with new dot 5 and then ran it, I opened the right side glad hand, the brakes grab but delay when the the brake pedal is released. The air does relief sometimes rightaway releasing fluid pressure, other...

Thanks for the info!, your talking about the glad hand in the front right hand fender from the drivers seat?

thanks for the info, I was questioning wether to replace the master cylinder as well, I might just do it because the bore on the cylinder is rusted and we honed it and rebuilt it a few yrs back but it slowly leaks

Hello, new to the forum, I currently own an m 813 five ton truck, it hasn’t been moved in a while, when I went to move it I noticed it needed brake fluid and so I added dot 5 to the master cylinder and bled it out to the wheel cylinders starting with the furthest away and then finishing with the...