OTTO Tfr55 4Jb1T Fuel Injection Pump Parts Repair Kit Delivery Valve 093 8971669770 897166-9770 8-97166977-0 For Isuzu The OTTO Tfr55 4Jb1T Fuel Injection Pump Parts Repair Kit is a precision-engineered, high-quality solution designed to service, restore, and optimize the performance of Isuzu’s 4Jb1T series fuel injection pumps. As a critical component in fuel delivery systems, this repair kit is meticulously crafted to align with Isuzu’s stringent manufacturing standards, ensuring seamless compatibility and reliable operation in both light and medium-duty machinery applications.