The book describes the frequency and technology of maintenance of cars KrAZ-256, KrAZ-256B, KrAZ-257 and KrAZ-258. The malfunctions of cars and methods for their elimination, disassembly and assembly of units, assemblies, monitoring the condition of car parts with the indication of equipment and devices are considered in detail. Recommendations for restoring parts are given. The appendices contain data on rolling bearings and tightening torques of the main threaded joints. The book is intended for engineering and technical workers of motor transport enterprises.