20508574 Pulley | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta pulley is an OEM service component used in the Crankshaft / Accessory-Drive Pulley. It is manufactured to the original Volvo Penta dimensional, material and interface requirements for the documented Volvo Penta 5-litre TAD5 industrial diesel application. Technical identification: Pulley for crankshaft-mounted fan configurations, including high-mounted right-side generator/left-side air-conditioning arrangements. In service, it locates and drives the associated rotating component while maintaining belt or gear alignment, speed ratio, run-out and shaft support. Selection must be confirmed by OEM part number 20508574, the exact model/product number, serial number and installed assembly configuration.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD720VE
• Volvo Penta TAD721VE
• Volvo Penta TAD722VE
• Volvo Penta TAD520VE

• Engine Family: TAD

⚙️ Key Features

• OEM part number 20508574
• Technical distinction: Pulley for crankshaft-mounted fan configurations, including high-mounted right-side generator/left-side air-conditioning arrangements
• Inspect the mating shaft/key/spline, install with the correct press or puller method, align belt/gear tracks and verify run-out and fastener torque.

🔌 Function

Locates and drives the associated rotating component while maintaining belt or gear alignment, speed ratio, run-out and shaft support. Inspect the mating shaft/key/spline, install with the correct press or puller method, align belt/gear tracks and verify run-out and fastener torque.

⚠️ Common Signs of Failure

• Abnormal torsional vibration, rattling or cyclic noise
• Pulley, flywheel or hub run-out and belt-tracking problems
• Cracking, wear or damage at the hub, spokes or mounting face
• Loose fasteners, fretting or damaged key/spline interface
• Accessory-drive, starting or timing problems caused by misalignment

🛠️ 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

📦 Condition

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