20405796 Pulley | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Early Alternator Pulley - Part Number: 20405796

Genuine Volvo Penta alternator pulley used on early TD520GE and TD720GE 14 V 55 A and 28 V 35 A alternator arrangements. The 14 V application is used through serial number 1025582.

⚙️ Key Features

• Alternator drive pulley for early production

• Confirmed on 14 V 55 A and 28 V 35 A alternators

• 14 V application through serial number 1025582

• Used with the original alternator fan, nut and V-belt

• Pulley grooves must match the specified belt

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20405796 - current early-production alternator-pulley reference

OEM / Related Numbers:

• 20405794 - early 14 V 55 A alternator

• 20571565 - later 14 V 55 A alternator

• 20441521 - pulley nut

• 978515 - related early V-belt

• 20405804 - early tensioner

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta TD520GE / TD720GE alternator drives

Typically suits:

• Engine / equipment models:

• TD520GE

• TD720GE

• Engine Type: Volvo Penta 5- and 7-litre industrial diesel

• Year / Serial Range: Early alternator arrangement; 14 V application through serial 1025582

🔌 Function

Transfers belt drive to the alternator at the specified speed ratio.

Common signs of failure:

• Belt squeal or slip

• Worn or chipped pulley grooves

• Pulley wobble

• Loose pulley nut

• Reduced charging output from belt slip

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging