| Hydraulic pumps are known to incur “fretting” between housing faces. We are able to grind these pump faces due to out capacity carry out “rotary” [ table ] grinding as well as the usual linear surface grinding for flat faces and port faces.. |
Many manufacturers such as Rexroth, Denison, and Komatsu work spherical faces on pumps and motors. The concave and convex faces on these Komatsu HPV90+90 pump barrels and port plates have been refurbished and tested at Lapping Services prior to assembly and testing of pump.