21644596 Unit Injector | Genuine Volvo Penta Part

🔧 Product Description

High-pressure electronic unit injector for Volvo Penta TAD950VE industrial engines within the documented serial range. The injector combines fuel pressurisation, metering and injection in one cylinder-mounted assembly and must be coded and installed using the correct calibration procedure.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD952VE
• Volvo Penta TAD951VE
• Volvo Penta TAD950VE

• Engine Family: TAD
• Serial Range: SN7009179435-7009191387

⚙️ Key Features

• Genuine Volvo Penta electronic unit injector
• Confirmed TAD950VE serial-range application
• Multiple Volvo Penta new and exchange references
• Requires injector coding and correct rocker adjustment
• Supplied for one cylinder
• Engine type: 9.4-litre inline-six turbocharged industrial diesel
• 6 used per assembly

🔌 Function

Pressurises, meters and injects fuel directly into the cylinder under ECU control.

⚠️ Common Signs of Failure

• Hard starting or no-start
• Cylinder misfire or rough running
• Black, white or blue exhaust smoke
• Fuel knock or excessive return leakage
• Injector electrical fault code
• Fuel dilution of engine oil or poor fuel economy

🛠️ Service Notes

• Work scrupulously clean: cap or plug the fuel connections as soon as they are opened and keep grit out of the injector bore and off the injector body — contamination is the commonest cause of a new unit injector failing early
• Fit new O-rings and sealing washers throughout, lightly lubricated on assembly so they slide into the bore without rolling or being nipped
• Inspect the copper sleeve in the head while the injector is out; a sleeve that is disturbed, corroded or leaking must be renewed with the proper sleeve tooling before the injector goes back
• Clean the injector seat and the sealing area at the top of the bore, and check the hold-down clamp and yoke for wear or distortion — a bent clamp will let combustion gases past
• Tighten the clamp and set the unit injector adjustment to the procedure, sequence and figures in the workshop manual for your engine, bleed the fuel system before cranking, and where the engine management holds injector calibration or trim data, program the new injector in

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21644596 → Supersedes 21582094

OEM / Related Numbers

• 21582094 earlier number superseded by this part

Other-Brand OEM Numbers

• VOE21644596
• Delphi tag family: BEBE4D35001 - confirm the injector data plate
• Delphi tag family: BEBE4D04001 - confirm the injector data plate
• Delphi: BEBE4D35001 injector family - tag confirmation required
• Delphi: BEBE4D04001 injector family - tag confirmation required

OEM Reman Alternatives

• Volvo Penta exchange: 3801750
• Volvo Penta exchange: 3801432

Aftermarket / Verified Equivalents

• Related injector references: 20708597, 21582094, 21947757 and 22301416
• Injector O-ring kit: 276948
• Injector yoke: 21168206

📦 Condition

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