Forklift Truck With DEUTZ Diesel Engine Fault Diagnosis and Repair Abstract: DEUTZ diesel engine is Germany DEUTZ company has one of the most famous diesel engine of the world's advanced level, DEUTZ diesel engine has the advantages of simple structure, convenient maintenance. This paper from the history of diesel engine, diesel engine structure and working principle of the application of DEUTZ diesel engine, DEUTZ diesel engine is the common faults of five parts, respectively, discussed with instance analysis.In this paper the development of DEUTZ diesel engine and did research and introduces its working principle. In view of the DEUTZ in accordance with, the diesel engine structure and failure diagnosis and elimination and so on were studied. Report the developmental status of diesel engine, submitted to the defect of diesel engine and corrective actions, some for DEUTZ diesel engine fault has carried on the detailed investigation and analysis, summarized how to quickly determine the fault and maintenance and repair of the nature of the problem. In this paper, a detailed contents, have very strong pertinence, practicability and operational guidance. The way in accordance with DEUTZ engine users, the service personnel and for diesel engine industry personnel can have the effect of a certain reference guide. Keywords: DEUTZ Diesel Engine; Working principle; Fault diagnosis; Trouble shooting