This service manual covers the Deutz BF4L engine, including various related engine models such as the F2L, F3L, F4L, F2M, F3M, F4M, BF3L, BF3M, and BF4M series. Designed for the 2011 model year, this manual provides comprehensive guidance for maintaining and repairing these engines. It is an official factory resource, offering detailed procedures and specifications to ensure optimal performance and longevity. This manual serves as an essential guide for owners, mechanics, and technicians. It details general information, technical specifications, safety regulations, and disposal guidelines. Furthermore, it includes operating and workshop procedures, explanations of symbols, test and adjustment data, tightening specifications, and job cards. Advanced troubleshooting and electrical system diagnostics are also covered, equipping users with the knowledge to address any repair or maintenance need.