20580794 Alternator | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta D5/D7 28V 140A Alternator - Part Number: 20580794

A genuine 28-volt, 140-amp alternator for compatible Volvo Penta D5/D7 industrial engines. It supersedes earlier alternator 20460893 and works with voltage regulator 20580795.

⚙️ Key Features

• 28-volt, 140-amp charging output

• Volvo Penta remanufactured alternative: 3803960

• Matched fan, pulley, Woodruff key and mounting arrangement for the documented installation

• Works with Volvo Penta voltage regulator 20580795

• High-output design supports engine controls, battery charging and auxiliary electrical loads

• Correct belt alignment and cable capacity are essential for full rated output

• Volvo Penta remanufactured alternative 3803960 is documented for the same assembly

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20580794 - Current genuine Volvo Penta service reference

OEM / Related Numbers:

• 20580794 → Supersedes 20460893

• 3803960 - Volvo Penta remanufactured alternator

• 20409228 - Earlier alternator reference

• 20580795 - Matching voltage regulator

• 20580795 - Related D5/D7 Alternator Voltage Regulator

• 20580876 - Related Spacer

• 20580933 - Related Hose

• 20460893 - Earlier alternator reference

• 20460371 - Alternator fan

• 20460369 - Washer

• 20460368 - Nut

• 20460370 - Woodruff key

• 20460359 - Pulley

• 978774 - V-belt set

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta D7 industrial diesel engines

• TAD520/TAD720-series turbocharger, charging and flywheel installations

Typically suits:

• Engine models:

• TAD520VE

• TAD720VE

• TAD721VE

• TAD722VE

• TAD750VE

• TAD760VE

• Engine Type: Volvo Penta D7 inline-six industrial diesel

• HP Range: Determined by the exact D7 engine rating

• Electrical System: 28 volt

• Rated Output: 140 amp

• Year Range: Engine-generation and serial-number controlled

• Serial Applicability: Confirm the turbocharger, alternator, flywheel or belt configuration by engine serial number

🔌 Function

Generates regulated electrical power and recharges the battery while the engine runs.

Common signs of failure or reasons for replacement:

• Charging voltage does not rise correctly with the engine running

• Battery or low-voltage warnings occur

• Charging output becomes intermittent

• Bearing rumble, belt squeal or excessive pulley heat develops

• The alternator overheats or produces a burning smell

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging