1 Swap in a new set of shoes, reconnect the brackets & springs, put the drum back on and youâre done.  Thereâs no need for compressors, or opening fluid lines to retract pistons with these setups. As a matter of fact, replacing brake shoes on some vehicles can be accomplished in under 2 minutes, once the drum is removed.
The bicuspid valve, sometimes better known as the mitral valve, allows blood to flow in only one direction (assuming it is functional) from the left atrium to the left ventricle, it prevents blood from flowing back from the left ventricle into the left atrium.
The chordae tendineae keep the tricuspid and bicuspid valves from compressing past the point of closure when the ventricles contract. If the chordae tendineae were not functio â¦ ning properly, the pressure from ventricular contraction would force the valve to open into the atrium and cause backward flow of blood.