21134648 Flywheel | Genuine Volvo Penta Part

🔧 Product Description

A heavy flywheel used on TAD420VE and selected D5/D7 industrial engines from the specified serial break. The flywheel stores rotational energy, carries the starter ring gear and provides the driven-equipment mounting face.

🚤 Compatibility

Typically suits:

• Volvo Penta TD420VE
• Volvo Penta TAD620VE
• Volvo Penta TAD650VE
• Volvo Penta TAD660VE
• Volvo Penta TAD720VE
• Volvo Penta TAD721VE
• Volvo Penta TAD722VE
• Volvo Penta TAD750VE
• Volvo Penta TAD420VE
• Volvo Penta TAD520VE
• Volvo Penta TAD760VE

• Engine Family: TD, TAD
• Serial Range: SN-10465820

⚙️ Key Features

• Current replacement for flywheel 20532339
• Uses starter gear ring 21033328
• Serial-controlled application from SN10465820- in the TAD420VE parts list for your engine
• Precision balanced heavy casting
• Mounting face and inertia are matched to the engine rating
• Engine type: D7E-family turbocharged industrial/generator diesel

🔌 Function

Smooths crankshaft speed between combustion events, provides starter engagement and transmits torque to the connected drivetrain or generator.

⚠️ Common Signs of Failure

• Abnormal gear, valve-train or driveline noise
• Excessive runout or misalignment
• Fretting, scoring or cracked surfaces
• Timing, starting or power-delivery problems
• Metal contamination or accelerated mating-part wear

🛠️ 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 Supersession Chain

• 21134648 → Supersedes 21036060 → Supersedes 20532339 → Supersedes 20511563

OEM / Related Numbers

• 21036060 earlier number superseded by this part
• 20532339 earlier number superseded by this part
• 20511563 earlier number superseded by this part
• 21033328 - starter gear ring
• 21112999 - associated flange
• 20405654 - flywheel screws

📦 Condition

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