The subject of this paper is early hours wear problem of a hydraulic actuator. Material transfer from the actuator housing to the actuator surface was observed after short time of component testing. A general case, where the actuator is tilted in the bore due to side load, is examined. The mechanism of local scuffing (micro-welding) is discussed. The paper describes the theoretical analysis combined with practical experience in solving common wear problems related to poor material pair and lack of lubrication between sliding surfaces. A validated solution is also discussed.

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