VolvoHydraulic Parts

21248009 — Def Tank Pump Air Solenoid Valve 21248009 For Volvo Vnl Mack Truck

This is an air solenoid valve designed to control airflow within the DEF (Diesel Exhaust Fluid) tank system, ensuring proper operation of the SCR (Selective Catalytic Reduction) emissions control. It is manufactured to meet stringent Volvo quality standards, offering superior durability and sealing compared to worn or damaged valves that may leak or fail to actuate. Operators may notice DEF system warning lights, reduced engine power, or increased exhaust emissions when this valve malfunctions.

Def Tank Pump Air Solenoid Valve 21248009 For Volvo Vnl Mack Truck – Part No 21248009 – Volvo Spare Part
Part Specifications
BrandVolvo
CategoryHydraulic Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Flush hydraulic lines before fitting new components. Use only manufacturer-specified hydraulic fluid. Check O-rings and backup rings for correct orientation. Bleed air from system after installation.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeAir Solenoid Valve
MaterialBrass and EPDM rubber
ApplicationDEF Tank System
Service LifeReplace as needed based on diagnostic codes
CompatibilityVolvo specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A malfunctioning solenoid valve may cause the DEF system warning light to illuminate on the dashboard. If ignored, the system may intermittently fail to supply DEF, leading to reduced engine performance and increased emissions. Ultimately, continued operation with a faulty valve can result in the vehicle being unable to restart after a shutdown.

Installation Tip

Before installing, ensure the air lines connected to the valve are clean and free from debris that could cause immediate blockage. Avoid overtightening the valve body, as this can crack the housing or damage the internal seals.

Service Note

Inspect the DEF tank and associated air lines for any signs of contamination or damage when replacing this solenoid valve.