Description Cummins ISL / L9 High-Pressure Fuel Pump – 5594422RX (2019–2022)Description:Rebuilt high-pressure common-rail fuel pump for Cummins ISL 8.9 / L9 engines (2019–2022). This pump is fully rebuilt, inspected, and bench-tested to meet OEM Cummins rail pressure and flow specifications. It restores proper high-pressure delivery required for emissions-controlled engines and prevents derates, hard starting, low-rail-pressure fault codes, and injector performance issues.This pump replaces OEM part number 5594422RX, and may cross-reference with:55944225528900 / 5528900RX53678555367855RX53678565367856RXCompatible Engines:Cummins ISL 8.9 (EPA17 )Cummins L9 (2019–2022)Applications include Freightliner M2, Kenworth T270/T370, buses, fire apparatus, refuse trucks, and industrial equipment�� Need help verifying compatibility?Call (909) 639-4195, and we’ll confirm using your ESN (engine serial number).
