11127304 Pulley | Genuine Volvo Penta Part

🔧 Product Description

This is the genuine Volvo Penta fan drive pulley (part number 11127304) from the engine system group, serving the belt drive for the cooling fan on D12D and TAD/TWD 12-litre industrial and marine genset engines. It is catalogued as the fan drive pulley for D12D-A MG installations, listed as the alternative specification for that application. The pulley transfers belt drive from the crankshaft pulley to the fan hub so the cooling fan turns at the correct speed.

🚤 Compatibility

Typically suits:

• Volvo Penta D12D-A MG
• Volvo Penta D12D-E MG
• Volvo Penta TWD1240VE
• Volvo Penta TAD1250VE
• Volvo Penta TAD1251VE
• Volvo Penta TAD1252VE
• Volvo Penta TAD1250-52VE
• Volvo Penta TAD1241VE
• Volvo Penta TAD1242VE
• Volvo Penta TAD1241-42VE

• Engine Family: D, TWD, TAD
• HP Range: Approximately 350-480 HP
• Year Range: Approximately late 1990s - 2000s

⚙️ Key Features

• OEM Volvo Penta part number 11127304
• Fan drive pulley - alternative specification listed for D12D-A MG applications
• System group: Engine
• Net weight approximately 3.16 kg
• Fits D12D, TWD1240VE and TAD1240/1250 series 12-litre engines
• Supplied as a single pulley, not a complete fan drive assembly
• Engine type: Volvo Penta inline 6-cylinder 12-litre electronically controlled diesel

🔌 Function

The pulley carries the drive belt that turns the engine cooling fan, transmitting rotation from the crankshaft to the fan hub at the designed ratio. Correct pulley condition and alignment are essential for stable belt tension and consistent cooling airflow.

⚠️ Common Signs of Failure

• Worn, glazed or grooved belt running surface causing belt slip and squeal
• Rapid or uneven belt wear, belt edge fraying or belt throwing off
• Wobble or visible runout indicating a bent pulley or worn bearing/hub
• Cracks, corrosion or damage around the belt grooves or mounting face
• Overheating or reduced cooling airflow from lost fan drive speed

🛠️ Service Notes

• Inspect the belt running surfaces before fitting — a pulley with glazed, scored, pitted or rust-roughened grooves will chew through a new belt in very little running time
• Check that the pulley runs true and that its bearing or bush turns smoothly with no roughness or side play; fit a new belt whenever a pulley is changed
• Confirm that every pulley in the drive lies in the same plane and that the belt profile matches each groove — misalignment shows up as belt dust, squeal or a worn belt edge and will destroy a new belt quickly
• Fit onto a clean, dry, burr-free shaft or hub face and tighten the retaining fasteners in the sequence and to the figures given in the workshop manual for your engine
• Turn the engine over by hand before starting to confirm the belt is fully seated in every groove and that nothing fouls, then recheck belt tension after the first running period

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 8193930 - Related vibration damper
• 20533078 - Related crankshaft references
• 20538850 - Related crankshaft references
• 422253 - Related woodruff key
• 946440 - Related pulley / damper fastener

📦 Condition

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