Friction piston protection SCHAERER Spare Parts 3370065216

Inside a professional coffee machine, a friction piston protection layer is placed between the moving piston and its guide. Repeated heating and cooling cause the piston to expand and contract. Without this layer, the piston would grind against the guide, leading to scoring, wear, and eventual seizure. The protection piece absorbs friction, distributes load evenly, and keeps the piston centred, promoting quiet and consistent operation while reducing the need for frequent adjustments or replacements.

Installation occurs during routine maintenance. The technician removes the piston, cleans both the piston and guide, then fits the protection piece into its designated groove or recess. Once in place, the piston is reassembled, and the machine is returned to service. The material itself provides the necessary slip and cushioning, eliminating the need for additional lubrication.

This protection piece serves as a direct replacement for SCHAERER coffee machines. It is designed to match the original dimensions and tolerances, fitting without modification and restoring the piston assembly to its original performance. Regular inspection during scheduled cleaning is advised. If the layer shows thinning, cracking, or deformation, it should be replaced promptly to prevent damage to the piston or guide.

The part is lightweight and compact, simplifying storage and handling during service visits. It is a genuine SCHAERER spare part, listed in the coffee equipment maintenance section of the catalogue.