The OTR Water Pump for Peterbilt With Caterpillar 3406 Diesel ensures Expertise Built In with its undergoing of extensive testing to ensure it meets or exceeds OEM performance, including: hub shaft force testing to 1,800 ft-lbs, bearings housing force testing to 1,500 ft-lbs, and impeller/shaft press fit torque testing to 200 in-lbs. In addition, the core and surface are Rockwell hardness tested, and careful leak testing serves to ensure 100% leak-free protection. The OTR Water Pump for CUMMINS ISX, 1SZ (2007-2017) is made for the most demanding, heavy duty engine cooling needs. We take engine overheating seriously; with OTR water pumps boasting of OE specified bearings, unitized seals, high quality gaskets, and accessories to ensure proper function, fit, and form, so can you. This heavy duty water pump design delivers safety and reliability while boosting your engine's temperature maintenance. FleetPride is your First Click in Heavy Duty .