20798458 Pulley | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Accessory-Drive Pulley - Part Number: 20798458

Rotating belt-drive component used in the product-number-specific alternator or auxiliary-belt drive. It maintains the specified diameter, groove profile, offset and drive ratio for the connected accessory or cooling system.

⚙️ Key Features

• Manufactured to the original Volvo Penta dimensional and material specification

• Maintains correct fit, alignment and service access in the designated assembly

• Designed for diesel-engine heat, vibration and operating-load exposure

• Direct replacement for a worn, damaged, missing or corroded original component

• Must be matched by part number, engine product and serial/configuration before installation

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20798458 (OEM catalogue reference)

OEM / Related Numbers:

• Drive belt, mounting hub, washer, nut and associated tensioner

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Product-number-specific alternator or auxiliary-belt drive

Typically suits:

• Engine models:

• D5A-B TA; D5A-T; D5A-TA; D7A-B TA; D7A-T; D7A-TA; D7C-B TA; D7C-TA; TD520GE; TAD520GE; TAD520VE; TAD530GE; TAD531GE; TAD532GE; TD720GE; TAD720GE; TAD720VE; TAD721GE; TAD721VE; TAD722GE; TAD722VE; TAD730GE; TAD731GE; TAD732GE; TAD733GE

• HP Range: Approximately 100-300 HP, depending on engine rating

• Engine Type: Four- and six-cylinder turbocharged diesel

• Year Range: Approximately late 1990s-2000s

🔌 Function

Transfers belt drive at the specified diameter and offset while maintaining correct belt tracking, accessory speed and alignment.

Common signs of failure:

• Visible wobble, runout or belt misalignment

• Worn, damaged or polished belt grooves

• Fretting, cracking or looseness at the hub/shaft interface

• Belt squeal, edge wear or repeated belt loss

• Abnormal bearing load or vibration in the driven assembly

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging