# 21508511 Adapter | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta TWD16 Fan-Drive Cooling-System Adapter - Part Number: 21508511

  

A structural adapter used in the cooling-fan, fan-hub and belt-drive arrangement of Volvo Penta TWD1644GE and TWD1645GE generating-set engines.

  

⚙️ Key Features

  

• Cooling-system and fan-drive application

• Correct mounting geometry for the fan clutch and hub assembly

• Heavy-duty engine bracket construction

• Maintains pulley and fan alignment

• Designed for the specified studs, nuts and retaining hardware

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• Current OEM reference: 21508511

  

OEM / Related Numbers:

  

• 21508511

• 24130950 - Fan clutch

• 24235277 - Bracket

• 60116212 - Retainer

• 24156250 - Fan hub

• 953002 - Stud

• 3883978 - V-ribbed belt

• 3829958 - Pulley

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

• TWD1644GE cooling system

• TWD1645GE cooling system

• Confirm fan-clutch and bracket configuration by engine serial number

  

🔌 Function

  

The adapter locates the fan-drive components and maintains the alignment needed for reliable belt and cooling-fan operation.

  

Common signs of failure or damage:

  

• Fan or pulley misalignment

• Cracks around mounting points

• Fretting or elongated holes

• Abnormal belt wear

• Fan vibration or contact with the shroud

• Fasteners repeatedly loosening

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 695.94 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 695.94 AUD | In stock |

## Images

- 21508511 Adapter | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21508511-adapter-genuine-volvo-penta)
> Updated: 2026-08-03