Before you take a wrench in hands, you should have in stock all necessary spare parts. In due time prepare the list of all spare parts demanded for repair. Think not only of large spare parts, but also about accompanying details (linings, rings, radial sealing rings, nuts, greasing, hermetic etc.). For confidence ask the seller of spare parts — in many cases he knows not only catalogue number, but also technology of installation of a detail. Consult without ceremony how the corresponding knot gathers. If you wish to estimate in advance repair time in calculation also put time of visiting of shop of spare parts, and also possibility of their absence in a warehouse.