# 478429 Gear | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta gear marked Nitro, from the Fuel System group, weighing 2.39 kg and listed for 47 applications across the TAD, TWD, TAMD and TD series.

## 🚤 Compatibility

-   **Engine Family:** TAD, TWD, TAMD, TD

Full model list at the end of this description.

## ⚙️ Key Features

-   Marked Nitro
-   2.39 kg
-   47 applications across the TAD, TWD, TAMD and TD series
-   Gear 478297 is the close sibling at 2.4 kg, for engines from serial number 2120155516 onwards

## 🔌 Function

Transmits drive from the timing train to the injection pump, holding it in phase with the crankshaft.

## ⚠️ Common Signs of Failure

-   Whine or growl from the timing end of the engine
-   Injection timing found to have drifted
-   Rattle at idle that changes with load
-   Teeth found pitted, chipped or worn to a step
-   Bright metal debris in the oil or filter

## 🛠️ Service Notes

-   Gear 478297 sits only 10 grams away at 2.4 kg, so weight cannot separate them, order by the Nitro marking and the part number
-   Recheck injection timing after fitting and set the gear backlash to specification

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta TAMD74P-A, TAMD74P-B, TAMD74A, TAMD74C-A, TAMD74C-B, TAMD74L-A, TAMD74L-B
-   Volvo Penta TAD1030P, TAD1030G, TAD1030GE, TAD1030V
-   Volvo Penta TAD730G, TAD730P, TAD730V
-   Volvo Penta TAMD72A, TAMD72P-A, TAMD72WJ-A
-   Volvo Penta TWD1210G, TWD1210P, TWD1210PB
-   Volvo Penta TAD1031G, TAD1031GE
-   Volvo Penta TAD1230G, TAD1230V
-   Volvo Penta TAMD122P-A, TAMD122P-B
-   Volvo Penta TAMD73P-A, TAMD73WJ-A
-   Volvo Penta TD121GP, TD121GPB
-   Volvo Penta TWD1211P, TWD1211G
-   Volvo Penta TWD1230ME, TWD1230VE
-   Volvo Penta TAD1032GE
-   Volvo Penta TAD1231GE
-   Volvo Penta TAD1232GE
-   Volvo Penta TAMD102D
-   Volvo Penta TAMD103A
-   Volvo Penta TAMD63P-A
-   Volvo Penta TAMD71A
-   Volvo Penta TAMD75P-A
-   Volvo Penta TD1210G
-   Volvo Penta TD710G
-   Volvo Penta TWD1031VE
-   Volvo Penta TWD1231VE
-   Volvo Penta TWD710G

## Details

- **Price:** 935.94 AUD
- **Vendor:** Volvo Penta
- **Type:** Fuel System
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 935.94 AUD | In stock |

## Images

- 478429 Gear | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/478429-gear-genuine-volvo-penta)
> Updated: 2026-09-19