20727639 Vibration Damper | Genuine Volvo Penta Part

🔧 Product Description

Crankshaft torsional vibration damper used on selected TAD7 generator-engine configurations, including installations with a separate fan bracket. The correct damper depends on the genset speed, output and front-drive arrangement. Application note: Confirm the engine's product number, rated speed, genset output and separate-fan-bracket configuration.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD721GE
• Volvo Penta TAD722GE
• Volvo Penta TAD732GE EDC4
• Volvo Penta TAD733GE EDC4

• Engine Family: TAD
• Year Range: Approximately late 1990s-2000s

⚙️ Key Features

• Application-specific torsional damper for TAD7 generator engines
• Controls crankshaft firing-pulse oscillation at constant genset speed
• Compatible with the specified separate fan-bracket/front-drive arrangement
• Maintains accessory and timing-drive durability
• Must be matched to engine product number, rated speed and generator configuration
• Engine type: 7 L six-cylinder turbocharged generator diesel
• 2 used per assembly

🔌 Function

Absorbs torsional crankshaft vibration at the engine's governed operating speed, reducing stress on the crankshaft, timing gears and driven equipment.

⚠️ Common Signs of Failure

• Cracked, shifted or deteriorated damping element
• Visible damper wobble or separation
• New vibration or rattling at governed generator speed
• Repeated front-drive or fan-bracket failures
• Crankshaft or timing-gear damage if torsional vibration is uncontrolled

🛠️ 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

📦 Condition

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