This service repair manual covers Takeuchi TB125, TB135, and TB145 compact excavators. These diesel-powered machines are engineered for reliability and performance in various construction and landscaping applications. Featuring hydrostatic transmissions and pilot-operated hydraulic controls, they offer precise operation and variable speed capabilities. Their robust construction, including rubber track undercarriages and ROPS/FOPS compliant operator stations, ensures durability and operator safety across diverse working environments. This manual provides comprehensive guidance for maintaining and repairing your Takeuchi compact excavator. It details essential procedures for engine service, hydraulic system maintenance, and drivetrain upkeep, including lubrication specifications and recommended service intervals. Technical specifications, troubleshooting guides, and diagnostic information are included to assist owners, mechanics, and technicians in ensuring optimal performance and longevity of the TB125, TB135, and TB145 models.