In the article presents the results of researches of the device of centrifugal pumps of type «D», operating conditions of pumps, processes of deterioration of details, factors infiuencing occurrence of defects in details, moderning of technology of restoration of a resource of detalis of water pumps. A combined method for restoring the resource of the casing is proposed, taking into account the resurts of researches of wear of the working surface and working conditice hudro abrasive, cavitations,hudrogen and other types of wear. Recommendations are qiven to the choice of processing and taking into account the infiuence of technological and operational factors on the adhesive strength of the joint of the massing. Figs.: 17. Tabl. 3. Refs.: 10 titles.