4340 Brakes

[falmathoros]

Hello, Its been awhile since i've corresponded. I've sorted out my PTO problem by installing an upgrade PTO shaft and the Zetor is working fine. One minor problem is the Brakes. I've replaced the slave cylinders and unfrozen the both brakes to work. The left brake is fine, but the right brake sucks air and won't bleed out air despite all efforts including replacing the master cylinder. I can pump up the right brake and it will hold solid, but after release and a few minutes when pressed the brake pedal will go to the floor and re-bleeding finds air bubbles in the system. Any suggestions as all fittings are tight. Could it be the hoses from the reservoir to the master cylinder? What say you? Nick

 

[Saskatchewan]

If you have air getting in then you must also be getting brake fluid going out. Check the master and inlet/outlet ports and if not there then maybe somewhere on the line to the rear of the tractor has been vibrating and rubbing or damaged/pinched and a small leak has developed.

Look for new brake fliud or better yet get somone else to pump the brake pedal while you look for the fliud leak along the line.