OTTO Excavator Spare Parts Tfr55 4Jb1T Generator Adjusting Arm 8971320490 897132-0490 8-97132049-0 For Isuzu A rugged, OEM-compatible component engineered for reliable performance in light to medium-duty industrial and utility applications, this OTTO Generator Adjusting Arm is specifically designed to fit Isuzu 4JB1T turbocharged engines and seamlessly integrate with Isuzu TFR55 vehicles (commonly used in construction auxiliary equipment, light excavators, and utility fleets). Featuring three interchangeable part numbers—8971320490, 897132-0490, and 8-97132049-0—it adheres to strict industrial quality standards, ensuring structural integrity and long-lasting durability in demanding work environments.