21376964 Adapter | Genuine Volvo Penta Part

🔧 Product Description

Genuine adapter used in the crankshaft vibration-damper and front-pulley assembly of the Volvo Penta D13B-A MP marine diesel engine. It locates the damper and pulley components concentrically on the crankshaft.

🚤 Compatibility

• Engine Family: D

Full model list at the end of this description.

⚙️ Key Features

• Confirmed D13B-A MP application
• Crankshaft vibration-damper adapter
• Factory concentric bore and mounting geometry
• Maintains damper and pulley alignment
• Works with the specified crankshaft, damper and pulley components
• Quantity varies by assembly, most commonly one

🔌 Function

The adapter locates and couples the crankshaft vibration damper and pulley assembly so rotating components remain concentric.

⚠️ Common Signs of Failure

• Fretting or movement at the joint
• Crankshaft pulley wobble
• Abnormal torsional vibration
• Wear at the centring surface

🛠️ Service Notes

• Check the adapter against both of the parts it has to join before fitting — adapters are specific to an engine and its variant, and one that is close but not correct will not seat or seal properly
• Clean and inspect both mating faces or connector ends; grit, old sealant or corrosion on one side is the usual reason an adapted joint leaks or works intermittently
• Renew any O-ring, gasket or sealing washer belonging to the joint rather than reusing the old one, and lubricate rubber seals lightly so they slide into place instead of rolling or nipping
• Tighten threaded adapters to the figure given in the workshop manual for that connection; many go into aluminium or onto a soft seat and will distort if pulled up hard
• Where the adapter is a workshop tool, check it for thread wear and damage before use and never modify it to make something fit

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21376964 → Supersedes 3595298

OEM / Related Numbers

• 3595298 earlier number superseded by this part
• 21230583 - Crankshaft references by revision
• 22697519 - Crankshaft references by revision
• 3594670 - Vibration-damper references
• 23049224 - Vibration-damper references
• 21710847 - Pulley
• 21499128 - Shaft
• 997790 - O-ring

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D13C2-B MP, D13C1-A MP, D13C2-A MP, D13C3-A MP, D13C4-A MP, D13B-A MP, D13B-H MP, D13B-G MP, D13B-L MP, D13B-E MG, D13B-E MG (FE), D13B-E MH, D13B-E MH (FE), D13B-K MP, D13B-N MH, D13B-N MH (FE), D13B-B MP, D13B-D MP, D13B-J MP, D13B-M MP, D13B-C MP, D13C4-B MP, D13C5-B MP, D13C6-A MP, D13C1-A MH, D13C2-A MH, D13C1-B MG, D13C3-B MG, D13C5-A MP, D13C2-A MG, D13C1-A MG, D13C7-B MP, D13C8-B MP, D13C9-A MP