PAI 840071 Fuel Overflow Valve – Mack MP7/MP8 & Volvo D11/D13 Secondary Air Filter Hendrickson: C-20901

Hendrickson: C-20901

Pair with RT35L for the left-hand side of the same hanger set

International 9900ix – 2000-2009

and Stemco 383-0136

579 with matching drive axles

PAI 840071 Fuel Overflow Valve – Mack MP7/MP8 & Volvo D11/D13 Secondary Air Filter Hendrickson: C-20901The PAI 840071 is an aftermarket fuel overflow (return pressure regulator) valve for Mack MP7 MP8 and Volvo D11 D13 diesel engines. The valve regulates fuel pressure in the return circuit and stops fuel from draining back to the tank when the engine is shut down, preventing prime loss and extended cranking on restart. Direct replacement for OEM 21458307, 20715052, and 21022032. Signs You Need a New Fuel Overflow Valve Extended cranking or hard