# 20460478 Disc | Genuine Volvo Penta Part

## 🔧 Product Description

Thin spring-steel valve disc that opens and closes the compressor intake or discharge passage in response to pressure difference.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD720VE
-   Volvo Penta TAD721VE
-   Volvo Penta TAD722VE

-   **Engine Family:** TAD
-   **HP Range:** Approximately 237-280 HP
-   **Year Range:** Approximately 1998 - 2006

## ⚙️ Key Features

-   Genuine Volvo Penta air-compressor valve disc
-   Direct service replacement for Volvo Penta part number 20460478
-   Thin spring-steel valve disc that opens and closes the compressor intake or discharge passage in response to pressure difference
-   Engine type: 7.2-litre six-cylinder turbocharged industrial diesel

## 🔌 Function

Thin spring-steel valve disc that opens and closes the compressor intake or discharge passage in response to pressure difference.

## ⚠️ Common Signs of Failure

-   Compressor output falls or pressure build-up becomes slow
-   Scoring, cracking, distortion or excessive running clearance
-   Air, oil or coolant leakage associated with the internal failure
-   Metal debris, overheating or seizure during compressor inspection

## 🛠️ Service Notes

-   Inspect the complete compressor for bore, crank, bearing and valve damage rather than replacing one internal part in isolation
-   Confirm that internal components are serviceable separately for the exact compressor version and serial number

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   20460472 - 600cm³ air compressor
-   20460473 → 20942758 - compressor drive-gear chain
-   20460465 - gear cover and cover O-ring
-   20460466 - gear cover and cover O-ring
-   20460467 - housing / coolant O-ring
-   20460469 - support bracket and alignment shim
-   20460471 - support bracket and alignment shim
-   20460474 - drive-gear flange nut and unloader actuator
-   20460475 - drive-gear flange nut and unloader actuator
-   20460476 - head gasket, valve plate and valve disc
-   20460477 - head gasket, valve plate and valve disc
-   20460480 - connecting rod and control piston
-   20460481 - connecting rod and control piston
-   20460501 - semi-rotary pump and O-ring
-   20460502 - semi-rotary pump and O-ring

### Other-Brand OEM Numbers

-   VOE20460478 - Volvo Construction Equipment prefixed number format

## 📦 Condition

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

## Details

- **Price:** 442.0 AUD
- **Vendor:** Volvo Penta
- **Type:** Power Take-Off
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 442.00 AUD | In stock |

## Images

- 20460478 Disc | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20460478-disc-genuine-volvo-penta)
> Updated: 2026-10-12