20405896 Compression Spring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta compression spring used in the cylinder-block lubricating-oil pressure-control valve on TAD530GE and TAD531GE engines. It works with valve 20405936, sleeve 20405937, ring 20405904 and delivery valve 11700271.

🚤 Compatibility

• Engine Family: D, TD, TAD, MD

Full model list at the end of this description.

⚙️ Key Features

• Calibrated oil-pressure control spring
• Installed in the cylinder-block pressure-regulating valve assembly
• Controls the opening force of valve 20405936
• Works with guide sleeve 20405937 and retaining ring 20405904
• Spring free length and load must meet the workshop specification
• Engine type: Volvo Penta 5-litre four-cylinder industrial diesel

🔌 Function

Applies the calibrated closing force to the oil-pressure regulating valve so engine-oil pressure remains within specification.

⚠️ Common Signs of Failure

• Low or excessive engine-oil pressure
• Oil-pressure fluctuation
• Spring broken, distorted or weakened
• Valve opening at the wrong pressure
• Bearing damage caused by pressure-control failure

🛠️ Service Notes

• Compare the new spring with the one removed for free length and coil condition; a spring that has taken a set or lost length is past its useful life
• Look over the old spring for corrosion pitting, bright rub marks and cracked or broken coil ends, and check whatever it bears against for the same wear
• Never stretch, shorten, grind or heat a spring to alter how it behaves — fit the correct part instead
• Seat the spring squarely in its recess or over its guide with the ends fully home, so it cannot cock over or bind in service
• Where springs work as a group, renew them together so the load stays even across the set

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 11700271 - delivery valve
• 20405904 - retaining ring
• 20405936 - regulating valve
• 20405937 - guide sleeve
• 20412745 - related cap plug

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D7A-B TA, D7A-T, D7A-TA, D7C-B TA, D7C-TA
• Volvo Penta D5A-B TA, D5A-T, D5A-TA
• Volvo Penta MD2010, MD2010B
• Volvo Penta TAD520GE, TAD520VE
• Volvo Penta TAD530GE MECH, TAD530GE EDC4
• Volvo Penta TAD531GE MECH, TAD531GE EDC4
• Volvo Penta TAD720GE, TAD720VE
• Volvo Penta TAD721GE, TAD721VE
• Volvo Penta TAD722GE, TAD722VE
• Volvo Penta TAD730GE MECH, TAD730GE EDC4
• Volvo Penta TAD731GE MECH, TAD731GE EDC4
• Volvo Penta TAD750GE, TAD750VE
• Volvo Penta TD520GE, TD520VE
• Volvo Penta TD720GE, TD720VE PP
• Volvo Penta TAD532GE EDC4
• Volvo Penta TAD550GE
• Volvo Penta TAD551GE
• Volvo Penta TAD732GE EDC4
• Volvo Penta TAD733GE EDC4
• Volvo Penta TAD751GE
• Volvo Penta TAD760VE