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Mack · Hydraulics
21481825
In stock · ships from Knoxville
This is a genuine Mack DEF (Diesel Exhaust Fluid) pump-to-doser hose.
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Verified fitment for 1 applications
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All confirmed applications for this part number.
Mack Trucks
Mack Trucks
Advertised as fitting Mack trucks; likely covers multiple models such as Pinnacle, Granite, Anthem, etc. that use this DEF pump-doser hose configuration. Always confirm with your VIN or dealer.
Part data verified against 1 catalog sources
Numbers this part supersedes or interchanges with. Showing 1 of 1.
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It carries urea solution from the DEF pump to the doser injector in the Selective Catalytic Reduction (SCR) aftertreatment system, where it is sprayed into the exhaust stream to reduce NOx emissions. These hoses can degrade over time due to heat, vibration, and the corrosive nature of DEF, leading to leaks, blockages, or crystallization that trigger Check Engine lights and affect emissions compliance. Replace a failed hose with this authentic 109-inch assembly featuring 90-degree swivel fittings and a 10-inch pigtail to ensure a reliable, leak‑free connection.
Part Number: 21481825
HOSE (MACK)
Dealer: KP Services Crossville
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