20405634 Spring Pin | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta 18 × 24 mm spring pin used to locate the crankshaft V-belt pulley and vibration-damper assembly. One pin is used in the D5/D7 crank mechanism.

🚤 Compatibility

• Engine Family: D, TD, TAD, MD

Full model list at the end of this description.

⚙️ Key Features

• 18 × 24 mm hardened locating spring pin
• One used in the crankshaft pulley assembly
• Locates V-belt pulley 20405725 relative to the crankshaft
• Works with four six-point screws 20405724
• Prevents pulley movement while the fasteners maintain clamp load
• Engine type: Volvo Penta four- and six-cylinder industrial diesel

🔌 Function

Indexes and locates the belt pulley or vibration-damper hub on the crankshaft.

⚠️ Common Signs of Failure

• Pulley movement or timing-mark misalignment
• Sheared or deformed pin
• Enlarged locating hole
• Repeated pulley screw loosening
• Abnormal front-engine vibration

🛠️ Service Notes

• Support the component solidly and drive the pin straight along its bore with a pin punch of the correct size — a pin started at an angle burrs the bore and locks up
• Check the holes in the two parts line up and the bore is clean and free of burrs before you start
• Fit a new pin rather than reusing one that has been driven out; a spring pin loses its grip once it has been collapsed and expanded
• Drive it to the same depth as the original so it sits flush and cannot foul or catch a moving part
• Where the pin retains a shaft, lever or roller, check the joint moves freely afterwards and that the pin is properly captive

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20405725 - crankshaft V-belt pulley
• 20405724 - pulley retaining screws
• 20546792 - related crankshaft vibration damper

📦 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 TD720GE, TD720VE PP
• Volvo Penta TAD420VE
• Volvo Penta TAD532GE EDC4
• Volvo Penta TAD550GE
• Volvo Penta TAD551GE
• Volvo Penta TAD560VE
• Volvo Penta TAD561VE
• Volvo Penta TAD620VE
• Volvo Penta TAD650VE
• Volvo Penta TAD660VE
• Volvo Penta TAD732GE EDC4
• Volvo Penta TAD733GE EDC4
• Volvo Penta TAD734GE
• Volvo Penta TAD751GE
• Volvo Penta TAD752GE
• Volvo Penta TAD753GE
• Volvo Penta TAD754GE
• Volvo Penta TAD760VE
• Volvo Penta TAD761VE
• Volvo Penta TAD762VE
• Volvo Penta TAD763VE
• Volvo Penta TAD764VE
• Volvo Penta TAD765VE
• Volvo Penta TD420VE
• Volvo Penta TD520GE