Side loading – Side loading is caused from the cylinder being misaligned which creates an unusual force on the piston rod. A side load of enough magnitude can result in tube scoring, piston rod and rod bearing wear, and seal failure.
Contaminated Fluid – Contaminated fluid can cause premature rod seal failure. Abrasive particles in the fluid can damage the seal and the piston rod surface, airborne contamination can be drawn into a cylinder by a faulty wiper seal. Contamination occurs in numerous ways, the most common is drawn in from oil or from the pump.
Rough or scored rods – Rough places on the rod damage the seals and reduce their normal life resulting in the necessity for frequent replacement.