# 20555448 Pulley | Genuine Volvo Penta Part

## 🔧 Product Description

A genuine Volvo Penta pulley used in the engine auxiliary belt-drive system. It is supplied as an individual service component under part number 20555448 and is intended to restore the original fit, sealing, alignment, retention or operating function of the specified assembly. This listing supplies the named component only; adjoining parts are serviced separately.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D5A-B TA
-   Volvo Penta D5A-T
-   Volvo Penta D5A-TA
-   Volvo Penta D7A-B TA
-   Volvo Penta D7A-T
-   Volvo Penta D7A-TA
-   Volvo Penta D7C-B TA
-   Volvo Penta D7C-TA
-   Volvo Penta TAD720VE
-   Volvo Penta TAD721VE
-   Volvo Penta TAD722VE
-   Volvo Penta TAD520VE
-   Volvo Penta MD2010
-   Volvo Penta MD2010B

-   **Engine Family:** D, TAD, MD
-   **Serial Range:** For fan at separate fan bracket., 2 grooves, SN-10851816

## ⚙️ Key Features

-   Matched belt profile and running diameter for the assigned auxiliary drive
-   Hub and mounting interface maintain pulley or fan concentricity
-   Designed for the specified belt load, engine speed and cooling demand
-   Works with the documented bearings, adapters, fan and retaining hardware
-   Correct alignment prevents belt edge wear and bearing overload
-   Check run-out, bearing play and tensioner movement during installation
-   Engine type: Volvo Penta D5 inline-four industrial diesel
-   ratio 1:10. (Volvo assembly listing)

## 🔌 Function

Transfers belt drive between the crankshaft and the engine auxiliaries.

## ⚠️ Common Signs of Failure

-   Belt tracking becomes incorrect
-   The pulley is cracked or worn
-   Run-out or vibration is visible
-   The hub or keyway becomes loose
-   Belt noise or dust increases

## 🛠️ Service Notes

-   Inspect the belt running surfaces before fitting — a pulley with glazed, scored, pitted or rust-roughened grooves will chew through a new belt in very little running time
-   Check that the pulley runs true and that its bearing or bush turns smoothly with no roughness or side play; fit a new belt whenever a pulley is changed
-   Confirm that every pulley in the drive lies in the same plane and that the belt profile matches each groove — misalignment shows up as belt dust, squeal or a worn belt edge and will destroy a new belt quickly
-   Fit onto a clean, dry, burr-free shaft or hub face and tighten the retaining fasteners in the sequence and to the figures given in the workshop manual for your engine
-   Turn the engine over by hand before starting to confirm the belt is fully seated in every groove and that nothing fouls, then recheck belt tension after the first running period

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   20555448 → Supersedes 20509131

### OEM / Related Numbers

-   20509131 earlier number superseded by this part
-   20555444 - Related D5A-B TA Crankcase
-   20555442 - Related D5A-B TA Stage 2/Tier 2 Crankcase
-   20555440 - Related Bushing
-   20405979 - Related earlier crankcase reference
-   21251563 - Related cylinder-block reference

## 📦 Condition

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

## Details

- **Price:** 1415.24 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1415.24 AUD | In stock |

## Images

- 20555448 Pulley | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20555448-pulley-genuine-volvo-penta)
> Updated: 2026-08-22