This service and repair manual covers the Bobcat 425 and 428 Compact Excavator models, specifically for serial numbers AACJ11001 and above for the 425, A9K311001 and above for the 425, and A9K411001 and above for the 428. These excavators are engineered for robust performance and reliability in demanding work environments, offering efficient operation and durability. Their compact design allows for maneuverability in confined spaces, making them versatile for various construction and landscaping applications.

This manual provides comprehensive information essential for the maintenance and repair of your Bobcat compact excavator. It details procedures for safety, hydraulic system, undercarriage, upperstructure, swing section, electrical system analysis, engine service, and heater operation. Technical specifications are also included to assist owners, mechanics, and technicians in accurately diagnosing issues and performing necessary upkeep to ensure optimal performance and longevity of the equipment.