# 22003479 Starter Gear Ring | Genuine Volvo Penta Part

## 🔧 Product Description

Heat-treated starter ring gear used on selected TAD7 engine flywheels. The gear has the tooth form and interference-fit diameter required for the matching starter pinion.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD720VE
-   Volvo Penta TAD721VE

-   **Engine Family:** TAD

## ⚙️ Key Features

-   Correct tooth count, pitch and outside diameter
-   Heat-treated ring-gear teeth
-   Interference fit to the matching flywheel
-   Designed for the specified starter pinion
-   Concentric installation is essential

## 🔌 Function

Provides the toothed engagement surface used by the starter motor to rotate the engine during cranking.

## ⚠️ Common Signs of Failure

-   Chipped or heavily burred teeth
-   Starter grinding or intermittent engagement
-   Ring gear loose on the flywheel
-   Localised tooth wear at stopping positions
-   Cracks or heat damage from incorrect installation

## 🛠️ Service Notes

-   Fits only the TAD720VE and TAD721VE 7.15-litre industrial engines — this ring gear is not shared with Volvo's larger TAD ranges, so check the engine designation before ordering
-   It is the current number in a supersession chain running back through 21033328, 20706915 and 20405650, so a flywheel built at any point in that history takes this ring
-   Check the flywheel register is clean and heat the ring evenly before fitting so it goes on to size without cracking — an interference-fit ring dropped on cold will not seat concentric

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   22003479 → Supersedes 21033328 → Supersedes 20706915 → Supersedes 20405650

### OEM / Related Numbers

-   21033328 earlier number superseded by this part
-   20706915 earlier number superseded by this part
-   20405650 earlier number superseded by this part
-   Weger 7422003479 - 363.4 mm / 129-tooth ring gear

### Aftermarket / Verified Equivalents

-   Specification cross-reference: approximately 363.4 mm outside diameter, 129 teeth
-   Olsson Parts 122208

## 📦 Condition

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

## Details

- **Price:** 419.87 AUD
- **Vendor:** Volvo Penta
- **Type:** Starters & Starting
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 419.87 AUD | In stock |

## Images

- 22003479 Starter Gear Ring | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/22003479-starter-gear-ring-genuine-volvo-penta)
> Updated: 2026-09-06