piston seal assembly

Guide ring assembly must be checked before backing for wear and should be replaced if worn , so can guarantee the piston guide ring inside the cylinder bore with normal gap between . Guide ring , also known as wear rings , commonly used bronze, teflon , nylon 1010, MC nylon and polyacetal oil, abrasion , heat and friction materialsPiston bore and the piston rod of the head with the gap generally small , if the gap is too large Hydraulic tube fittings  should be replaced or optional piston assembly . Piston head card key connections should be able to rotate flexibly , without axial clearance . With threaded connections have sufficient tightening torque , and use cotter pins , lock spring or radial clamping screws locked , but the cotter pin and rugged screw overhang should not be too long, so as not to use as a buffer with Bottom bore part of the collision caused by use of the process also appears cylinder or piston head loss and other serious problems .