20587138 Adapter | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta adapter used in the engine mechanical, electrical or fluid interface. It is supplied as an individual service component under part number 20587138 and is intended to restore the original fit, sealing, alignment, retention or operating function of the specified assembly. This listing supplies the named component only; adjoining parts are serviced separately.

🚤 Compatibility

• Engine Family: D
• HP Range: 150-480 HP

Full model list at the end of this description.

⚙️ Key Features

• Interface adapter in the ignition and control system
• 0.005 kg
• Listed for 23 applications on D-series engines
• Supersedes 874666

🔌 Function

Provides the correct interface between components with different connection formats.

⚠️ Common Signs of Failure

• Intermittent signal or a warning lamp that comes and goes
• Fault that clears when the connection is moved by hand
• Green or white corrosion deposits on the contact faces
• Body found cracked or the retaining catch broken on removal

🛠️ 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

• 20587138 → Supersedes 874666

OEM / Related Numbers

• 874666 earlier number superseded by this part
• 20587131 - Related Locking Clamp
• 20587176 - Related Adapter
• 20586845 - Related Return Line
• 20586833 - Related Inlet Manifold
• 20586720 - Related O-Ring
• 20585893 - Related Vibration Damper

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-300A-G, D6-340A-G, D6-380A-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, D6-400A-G, D6-440A-G, D6-300I-G, D6-480A-G
• Volvo Penta D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G