20459925 Vibration Damper | Genuine Volvo Penta Part

🔧 Product Description

A genuine 205 mm crankshaft vibration damper for the D5A-B TA engine family. It reduces torsional oscillation in the crankshaft and helps protect the crankshaft, bearings, gear train and belt drive from repeated vibration loads.

🚤 Compatibility

Typically suits:

• Volvo Penta D5A-B TA
• Volvo Penta D5A-T
• Volvo Penta D5A-TA
• Volvo Penta TAD550GE
• Volvo Penta TAD551GE
• Volvo Penta TAD520VE
• Volvo Penta MD2010
• Volvo Penta MD2010B

• Engine Family: D, TAD, MD

⚙️ Key Features

• Designed for the crankshaft torsional-vibration control assembly
• 205 mm vibration-damper diameter
• Engine type: Volvo Penta D5 inline-four industrial diesel
• 205mm (Volvo assembly listing)

🔌 Function

Absorbs crankshaft torsional vibration to reduce fatigue loading across the rotating assembly.

⚠️ Common Signs of Failure

• The rubber element is cracked, swollen, extruded or separating
• Timing marks or the outer inertia ring shift relative to the hub
• New crankshaft, belt-drive or gear-train vibration develops
• The damper wobbles or runs out of true
• Crankshaft or accessory-drive noise increases at particular engine speeds

🛠️ Service Notes

• Treat the damper as a sealed assembly — it is not repairable, and nothing about it should be straightened, re-bonded or adjusted
• Renew it if the rubber is cracked, swollen, oil-soaked or has moved relative to the hub, and whenever the engine has been run with a known torsional or vibration problem
• Fit to clean, dry, undamaged mating faces, tightening the fasteners in the sequence and to the figures given in the workshop manual for your engine
• Use new bolts wherever the manual calls for them; the loading here is cyclic and a reused or stretched fastener is a poor risk
• While access is good, check the components it drives or couples to, and their alignment — a damper rarely fails for no reason

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20459925 - 205 mm vibration damper
• 20405540 - Related crankshaft references
• 20900811 - Related crankshaft references
• 21204112 - Related crankshaft references
• 21273414 - Related crankshaft references
• 20405529 - Related bearing references
• 20405541 - Related bearing references
• 21141948 - Related bearing references
• 21234191 - Related bearing references
• 20412286 - Related crankshaft seal
• 877337 - Related cylinder-liner kit references
• 3843536 - Related cylinder-liner kit references

📦 Condition

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