# 21226021 Hose | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta TAD5/TAD7 Expansion-Tank Coolant Hose - Part Number: 21226021

  

Genuine moulded coolant hose used in the radiator and expansion-tank systems of Volvo Penta TD5, TAD5, TD7 and TAD7 industrial and generating-set engines. It replaces earlier hose 20405748.

  

⚙️ Key Features

  

• Current replacement for hose 20405748

• Expansion-tank and radiator cooling-system application

• Factory moulded bend and hose diameter

• Used across documented TAD5 and TAD7 serial-range cooling packages

• Designed for hot pressurised coolant

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21226021 → Supersedes 20405748

  

OEM / Related Numbers:

  

• 21226021

• 20405748

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

Associated Service Parts:

  

• 20585482 / 21661750 - Expansion-tank references by revision

• 20585484 / 21661774 - Coolant-level sensor references

• 21087609 / 21661157 / 21662524 - Related hose references

• 943471 / 20893584 - Hose-clamp references

• 20405755 - Related clamp

• 20912088 - O-ring; ordered separately

• 20912085 - Plug; ordered separately

• 20912091 - Bracket; ordered separately

  

🚤 Compatibility

  

Confirmed engine families include:

  

• TD520GE

• TAD530GE

• TAD531GE

• TAD532GE

• TD720GE

• TAD720GE

• TAD730GE

• TAD731GE

• TAD732GE

• TAD733GE

  

Documented TAD732GE/TAD733GE cooling-package serial ranges include:

  

• 10410387-10590631

• 10590632-10944313

• From 10944314

  

• Confirm hose quantity, tank version, connection diameter and engine serial number

  

🔌 Function

  

The hose transfers coolant between the engine cooling circuit and the expansion tank while allowing thermal expansion and engine movement.

  

Common signs of failure:

  

• Coolant leakage

• Cracking or heat hardening

• Swelling or softening

• Internal collapse

• Chafing

• Air entering the cooling system

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 148.67 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 148.67 AUD | In stock |

## Images

- 21226021 Hose | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21226021-hose-genuine-volvo-penta)
> Updated: 2026-08-02