# 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

## Details

- **Price:** 112.24 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 112.24 AUD | In stock |

## Images

- 20798458 Pulley | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20798458-pulley-genuine-volvo-penta)
> Updated: 2026-08-01