# 20405904 Ring | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Oil Pressure Regulating Valve Retaining Ring - Part Number: 20405904

  

Genuine Volvo Penta ring used in the cylinder-block oil-pressure regulating valve assembly on TAD530GE and TAD531GE engines. It retains or seals the delivery valve, regulating valve, spring and sleeve components in their correct position.

  

⚙️ Key Features

  

• Precision retaining / sealing ring for the oil-control valve

• Used with delivery valve 11700271

• Works with valve 20405936, spring 20405896 and sleeve 20405937

• Maintains the assembled valve-stack position

• Should be replaced if distorted or damaged during removal

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 20405904 - current Volvo Penta oil-control ring reference

  

OEM / Related Numbers:

  

• 11700271 - delivery valve

• 20405936 - regulating valve

• 20405896 - compression spring

• 20405937 - valve sleeve

• 20412745 - cap plug

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta TAD5 cylinder-block oil-pressure control systems

  

Typically suits:

  

• Engine / equipment models:

• TAD530GE

• TAD531GE

  

• Engine Type: Volvo Penta 5-litre four-cylinder industrial diesel

• Year / Serial Range: Oil-control valve and cylinder-block design dependent

  

🔌 Function

  

Retains and seals the oil-pressure regulating components within the cylinder-block bore.

  

Common signs of failure:

  

• Ring distorted or no longer retaining the valve stack

• Oil-pressure control components moving in the bore

• Oil leakage around the valve plug

• Scoring or fretting at the ring groove

• Damage found during valve overhaul

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 52.01 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 52.01 AUD | In stock |

## Images

- 20405904 Ring | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20405904-ring-genuine-volvo-penta)
> Updated: 2026-07-30