20902910 Common Rail | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta common-rail accumulator for TAD550GE, TAD551GE, TAD560VE and TAD561VE fuel systems. The thick-walled rail stores pressurised fuel, damps individual high-pressure pump pulses and distributes a stable supply to each injector through the matched pressure pipes.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD550GE
• Volvo Penta TAD551GE
• Volvo Penta TAD560VE
• Volvo Penta TAD561VE

• Engine Family: TAD

⚙️ Key Features

• Genuine Volvo Penta High-Pressure Common Rail - part number 20902910
• High-pressure fuel accumulator for the specified D5 common-rail system
• Multiple injector outlets with engine-specific spacing and thread interfaces
• Rail volume dampens pressure pulsation between pump delivery events
• Interfaces with the specified pressure regulator/sensor and leak-off hardware
• Manufactured for extremely high diesel injection pressure
• All ports must remain capped and surgically clean until final assembly
• Rail and high-pressure pipes must match the exact fuel-system generation and engine serial number
• Engine type: D5-series common-rail industrial and generator engines

🔌 Function

The high-pressure pump charges the rail, and the stored fuel volume supplies each injector as the ECU commands injection. By acting as an accumulator, the rail helps keep pressure sufficiently stable despite the rapid, intermittent flow demanded by individual injectors.

⚠️ Common Signs of Failure

• Rail-pressure faults, difficult starting or engine derate
• Fuel leakage at an outlet or end fitting
• Pressure oscillation from internal damage or incorrect regulator
• Metal contamination found in the rail after pump failure
• Injector lines cannot seal because rail threads or seats are damaged

🛠️ Service Notes

• This is high-pressure fuel equipment: let the system depressurise before opening any union, and never crack a union with the engine running
• Cleanliness is everything — cap or plug every open port immediately, work in a clean area, and keep rag, brushes and workshop air away from anything that could leave fibres or grit in the rail
• High-pressure pipes are single-use: the pipe cone deforms to its seat when first tightened, so fit new pipes whenever they have been undone rather than refitting the originals
• Do not clamp the rail in a vice, dress a union seat or try to clean the rail internally — a damaged sealing cone or debris left inside will take out injectors
• Tighten unions and mountings to the workshop manual figures for your engine, since over-tightening damages the very seat the seal depends on, then prime, vent and leak-check at idle before putting it under load

🔄 Supersession & Cross Reference

Other-Brand OEM Numbers

• VOE20902910

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging