21514063 Flywheel | Genuine Volvo Penta Part

🔧 Product Description

A genuine heavy-duty flywheel used in Volvo Penta TAD11 industrial-engine installations equipped with an Allison 4000-series transmission. It provides the rotating inertia, starter-ring support and transmission-side mounting interface required by the specified drivetrain arrangement.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD1180-83VE
• Volvo Penta TAD1170-72VE
• Volvo Penta TAD1150-52VE
• Volvo Penta TAD1140-42VE

• Engine Family: TAD
• HP Range: Approximately 380-540 HP
• Year Range: Approximately 2010 - 2020 production-era applications

⚙️ Key Features

• Genuine Volvo Penta heavy-duty flywheel
• Configured for Allison 4000-series transmission installations
• Precision-machined crankshaft and transmission mounting faces
• Accepts ring gear 20711957
• Designed for high-torque TAD11 industrial service
• Engine type: 10.8L inline six-cylinder turbocharged industrial diesel

🔌 Function

Stores rotational energy to smooth crankshaft speed, supports starter engagement through the ring gear and transfers engine torque into the transmission coupling.

⚠️ Common Signs of Failure

• Starter grinding or failure to engage from damaged ring-gear teeth
• Drivetrain vibration caused by run-out or imbalance
• Cracking around the crankshaft or transmission mounting holes
• Abnormal noise during starting or shutdown
• Loose fasteners, fretting or damaged mounting faces

🛠️ Service Notes

• Inspect the ring gear teeth for chipping, burring and one-sided wear before refitting — a damaged tooth ring will chew up a new starter pinion
• Check the clutch or damper mating face for scoring, heat cracking and blueing, and check the crankshaft rear seal and any spigot bearing while access is good
• Clean the crankshaft flange and the flywheel face so both are dry and free of oil, old sealant and burrs; a trace of oil on that joint is enough to let the flywheel work loose
• Locate the flywheel the correct way round on its dowel or locating feature, and renew the bolts wherever the manual calls them single-use
• Tighten the bolts progressively in a criss-cross pattern to the figure and stages given in the workshop manual for your engine, and never lever against the ring gear teeth to hold it

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20711957 - flywheel ring gear

Other-Brand OEM Numbers

• Allison 4000 - associated transmission family

📦 Condition

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