Multiquip Y0602330422 DEF Header

The Multiquip Y0602330422 DEF Header is a genuine OEM component designed for DCA150SSJU4F and DCA220SSJU4F super-silent diesel generator models. As a factory-authorized part, it is built to the same specifications as the original, ensuring a correct, direct installation with no adaptation required. This part is confirmed for use across both the DCA150SSJU4F and DCA220SSJU4F series, including the 60Hz configuration, making it the dependable choice when servicing these units in the field or shop.

Key Features

• Genuine OEM Construction — Manufactured to the original design spec for the DEF dosing system, ensuring proper fluid delivery, correct sensor compatibility, and long-term chemical resistance against diesel exhaust fluid exposure.
• Direct-Install Replacement — Matches the original mounting configuration and connector interface on DCA150SSJU4F and DCA220SSJU4F generators, dropping in exactly as the factory component did.
• Confirmed Fitment — Verified for DCA150SSJU4F and DCA220SSJU4F super-silent generator models, including the DCA220SSJU4F 60Hz variant.
• Emission System Integrity — A correctly functioning DEF header maintains accurate reagent injection into the SCR aftertreatment system, keeping the generator within Tier 4 emissions compliance and preventing fault codes that can derate or shut down the unit.
• Emissions Compliance Critical — The DEF header is a regulated emissions control component; using the correct OEM part helps maintain Tier 4 Final compliance and avoids engine protection system faults that could take the machine offline on regulated job sites.

The DEF (Diesel Exhaust Fluid) header is a core component of the selective catalytic reduction (SCR) emissions system found on Tier 4 Final diesel engines. It controls the injection of DEF into the exhaust stream, where the fluid reacts with exhaust gases to reduce harmful nitrogen oxide (NOx) emissions. When the DEF header fails or degrades, it can disrupt fluid flow, trigger fault codes, and cause the engine control system to derate power output or shut the generator down entirely — making timely replacement critical to keeping the machine operational and compliant.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.