Multiquip RE552175 DEF Dosing Unit Pump - OEM Replacement Part

The DEF (Diesel Exhaust Fluid) Dosing Unit Pump precisely meters and injects diesel exhaust fluid into the exhaust stream of Tier 4 Final emission-compliant generators, enabling the Selective Catalytic Reduction (SCR) system to convert harmful nitrogen oxides into harmless nitrogen and water vapor. This critical emissions control component works in conjunction with the DOC/SCR assembly to meet EPA regulations and ensure your generator operates within compliance.

Designed specifically for Multiquip WhisperWatt Super Silent generator models equipped with Tier 4 Final engines, this DEF dosing pump maintains precise fluid delivery rates based on exhaust temperature, engine load, and NOx sensor feedback. Failure symptoms include SCR system fault codes, reduced engine power (derate), increased exhaust emissions, or DEF system warning indicators on the control panel.

Compatible with the following Multiquip generator models:

• DCA70SSJU4F
• DCA150SSJU4F, DCA150SSJU4F2, DCA150SSJU4F3
• DCA180SSJU4F, DCA180SSJU4F3
• DCA220SSJU4F, DCA220SSJU4F2, DCA220SSJU4F3
• DCA300SSJU4F, DCA300SSJU4F2, DCA300SSJU4F3, DCA300SSJU4F3PD

Genuine Multiquip OEM part, sold by an authorized dealer.