ZF Friedrichshafen 1589231 Power Steering Pump Assembly

This hydraulic power steering pump features a nominal displacement of 17.5 ml/r (cm³/rev) and a maximum operating pressure of 135 bar. The unit rotates counter-clockwise (CCW) and delivers a flow rate of approximately 16.0 L/min at rated engine speed. It is a ZF 8098 series constant displacement vane pump constructed with a cast iron housing and hardened steel rotor assembly, designed for high durability in commercial vehicle steering systems. The pump replaces Volvo OEM numbers 1589231, 1610367, 5001935, 5003253, 5007935, 5009253, 8124341, and 8001457. It cross-references to ZF 7673955225, Bosch KS01000190, Sampa 031.237-01, and Febi Bilstein 48763. Primary applications include Volvo FH, FL, FM, B10, B12, F10, F12, F16, N10, N12, NL10, and NL12 series trucks and buses equipped with Volvo TD122, TD100, TD120, or THD100 series engines.