21440870 Adapter | Genuine Volvo Penta Part

🔧 Product Description

A precision adapter used in the drive-shaft and bearing-housing assembly of selected Volvo Penta DPH and DPR sterndrives.

🚤 Compatibility

Typically suits:

• Volvo Penta D6-370A-C
• Volvo Penta D4-300A-C
• Volvo Penta D4-300A-D
• Volvo Penta D4-300A-E
• Volvo Penta D6-370A-D
• Volvo Penta D6-370A-E
• Volvo Penta D6-400A-E
• Volvo Penta DPR-A
• Volvo Penta DPR-C
• Volvo Penta DPR-D
• Volvo Penta DPR-B

• Engine Family: D, DPR
• HP Range: 300-400 HP

⚙️ Key Features

• Genuine Volvo Penta driveline adapter
• Precision-machined shaft and housing interfaces
• Maintains bearing and seal alignment
• Designed for DPH and DPR drive loads
• Replaces earlier adapter references
• Engine type: Volvo Penta sterndrive

🔌 Function

Provides the aligned transition between the drive shaft and adjoining bearing or housing component.

⚠️ Common Signs of Failure

• Bearing or seal misalignment
• Fretting or corrosion
• Damaged locating surfaces
• Excessive shaft movement

🛠️ 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

• 21440870 → Supersedes 3863218

OEM / Related Numbers

• 3863218 earlier number superseded by this part
• 3843546 - earlier adapter

📦 Condition

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