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