VolvoHydraulic Parts

3986330 — Hydraulic Steering Pump 3986330 For 1993-2008 Volvo Truck Fh12/390 Fh12 Fh12/500 Fh12/390 Fh12/340 Fm12/420 Fm12H/420

This hydraulic steering pump is the core component responsible for generating the high-pressure fluid flow required to operate the power steering system. It ensures smooth and responsive directional control of the vehicle by converting mechanical energy into hydraulic power. A failing pump will exhibit increased stiffness in steering and potential leaks, making it difficult to maneuver the equipment.

Hydraulic Steering Pump 3986330 For 1993-2008 Volvo Truck Fh12/390 Fh12 Fh12/500 Fh12/390 Fh12/340 Fm12/420 Fm12H/420 – Part No 3986330 – 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.

WhatsApp for Price & Availability☎ Call Mumbai Office

Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

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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 TypeHydraulic Steering Pump
MaterialCast Iron and Steel
ApplicationPower Steering System
Service LifeReplace every 5,000 hrs or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing hydraulic steering pump is often a noticeable increase in steering effort, especially at low speeds. If ignored, the steering may become progressively harder to turn, accompanied by whining or groaning noises. Continued operation with a compromised pump can lead to a loss of steering assist, significantly increasing the risk of losing directional control.

Installation Tip

Ensure the hydraulic system is thoroughly flushed to remove any debris before installing the new pump. Avoid overtightening the mounting bolts, as this can distort the pump housing and cause premature failure.

Service Note

Inspect the steering fluid, filter, and all hydraulic lines for contamination or damage when replacing the steering pump.