VolvoHydraulic Parts

31256757 — Coupling Oil Pump 31256757 For 2003-2014 Volvo S60 S80 Xc70 V70 Xc60 Xc90

This coupling connects the engine's crankshaft to the hydraulic pump, ensuring efficient power transfer for the hydraulic system. It is manufactured to meet stringent Volvo material standards, offering superior durability and resistance to fatigue compared to a worn or damaged coupling. Operators may notice a loss of hydraulic power, unusual noises from the engine bay, or a complete loss of hydraulic function when this component fails.

Coupling Oil Pump 31256757 For 2003-2014 Volvo S60 S80 Xc70 V70 Xc60 Xc90 – Part No 31256757 – 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 TypeCrankshaft to Hydraulic Pump Coupling
MaterialHigh-strength steel alloy
ApplicationHydraulic pump drive system
Service LifeReplace every 4,000 hrs or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A rattling or knocking sound from the engine area during operation is often the first indication of a failing coupling. If left unaddressed, the connection between the engine and hydraulic pump can degrade further, leading to intermittent hydraulic system performance. Continued operation with a compromised coupling risks significant damage to both the hydraulic pump and the engine's crankshaft.

Installation Tip

Ensure the crankshaft and pump shaft mating surfaces are perfectly clean and free of any debris before attempting installation. Do not force the coupling onto the shafts; it should slide into place with minimal resistance.

Service Note

Inspect the hydraulic pump and engine crankshaft seals for any signs of leakage or wear during replacement.