21425431 Pulley | Genuine Volvo Penta Part

🔧 Product Description

Genuine drive pulley used in a Volvo Penta coolant-pump or accessory-drive assembly. It belongs to the pulley family associated with later or alternative reference 21454749 and must match the belt section, bore, offset and mounting pattern.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD720VE
• Volvo Penta TAD721VE
• Volvo Penta TAD722VE

• Engine Family: TAD

⚙️ Key Features

• Engine accessory or coolant-pump pulley
• Factory groove profile and belt alignment
• Precision bore and mounting geometry
• Related later or alternative pulley 21454749
• Application controlled by drive layout and engine serial number

🔌 Function

The pulley transfers belt power to the coolant pump or assigned accessory at the designed speed.

⚠️ Common Signs of Failure

• Groove wear
• Cracking around the hub
• Abnormal bearing or belt noise

🛠️ 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 Supersession Chain

• 21425431 → Supersedes 20771417

OEM / Related Numbers

• 20771417 earlier number superseded by this part
• 21454749 related reference

📦 Condition

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