# 20798454 Pulley | Genuine Volvo Penta Part

## 🔧 Product Description

Rotating belt-drive component used in the high-mounted 28 v / 35 a alternator drive. It maintains the specified diameter, groove profile, offset and drive ratio for the connected accessory or cooling system.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TD720GE
-   Volvo Penta TD720VE PP
-   Volvo Penta TD520GE
-   Volvo Penta TD520VE
-   Volvo Penta TAD720GE
-   Volvo Penta TAD721GE
-   Volvo Penta TAD722GE
-   Volvo Penta TAD730GE MECH
-   Volvo Penta TAD730GE EDC4
-   Volvo Penta TAD731GE MECH
-   Volvo Penta TAD731GE EDC4
-   Volvo Penta TAD732GE EDC4
-   Volvo Penta TAD733GE EDC4
-   Volvo Penta TAD520GE
-   Volvo Penta TAD530GE MECH
-   Volvo Penta TAD530GE EDC4
-   Volvo Penta TAD531GE MECH
-   Volvo Penta TAD531GE EDC4
-   Volvo Penta TAD532GE EDC4

-   **Engine Family:** TD, TAD
-   **HP Range:** Approximately 300 HP
-   **Year Range:** Approximately late 1990s-2000s

## ⚙️ Key Features

-   Later-production pulley for the high-mounted 28 V / 35 A alternator drive
-   0.197 kg
-   19 applications across TD and TAD-series engines
-   Consolidates 20798204 and 20798216, both catalogued earlier as rings

## 🔌 Function

Takes the belt drive from the engine and turns the alternator rotor at the ratio set by its groove diameter.

## ⚠️ Common Signs of Failure

-   Belt squeal or a chirp that follows engine speed
-   Black belt dust collecting around the drive
-   Low or intermittent charging
-   Groove found polished, worn or with the ribs rounded off
-   A visible wobble or run-out as the alternator shaft is turned, or bearing noise from the alternator behind it

## 🛠️ Service Notes

-   This is the later-production version and replaces both 20798204 and 20798216, so order against the current number
-   Renew the belt at the same time - a worn pulley groove chews a new belt quickly
-   Check the alternator shaft and its nut for run-out before condemning the pulley

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   20798454 → Supersedes 20798204

### OEM / Related Numbers

-   20798216 earlier number superseded by this part
-   20798204 earlier number superseded by this part
-   20798373 belt-adjustment lock piece
-   20459033 alternator bracket
-   20797199 V-belt
-   20405804 tensioner

## 📦 Condition

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

## Details

- **Price:** 203.57 AUD
- **Vendor:** Volvo Penta
- **Type:** Belts, Pulleys & Tensioners
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 203.57 AUD | In stock |

## Images

- 20798454 Pulley | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20798454-pulley-genuine-volvo-penta)
> Updated: 2026-09-21