VolvoHydraulic Parts

3986328 — Power Steering Pump 3986328 85000031 7403986328 For Volvo Fh12 Fm12 Nh12 B12M

This is a power steering pump designed to circulate hydraulic fluid under pressure to operate the steering system of Volvo trucks. It is built to meet rigorous OEM performance standards, providing consistent flow and pressure, unlike a worn pump that may exhibit erratic steering assist. Operators may experience heavy steering, whining noises from the pump, or a complete loss of power steering assistance when this pump fails.

Power Steering Pump 3986328 85000031 7403986328 For Volvo Fh12 Fm12 Nh12 B12M – Part No 3986328 – 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 TypePower Steering Pump
MaterialCast iron, steel, aluminum
ApplicationPower steering system
Service LifeReplace as needed based on inspection
CompatibilityVolvo specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The initial symptom of a failing power steering pump is often a noticeable increase in steering effort, especially at low speeds. If left unaddressed, the steering may become increasingly difficult to turn, accompanied by whining or groaning noises from the pump. Continued operation risks complete loss of power steering assist, making the vehicle extremely difficult to maneuver safely.

Installation Tip

Ensure the power steering system is thoroughly flushed to remove any debris before installing the new pump to prevent contamination. Never run the new pump dry; always prime it with the correct fluid before starting the engine.

Service Note

Inspect the power steering hoses and reservoir for leaks or blockages, and replace the power steering fluid and filter if applicable.