421540 Belt Tensioner | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta belt tensioner from the Cooling System group, weighing 1.667 kg and listed for 58 applications across the TWD, TID, TAMD, TD and TAD series. It supersedes part number 3183644, which was catalogued earlier as an intermediate lever and as an arm.

🚤 Compatibility

• Engine Family: TWD, TID, TAMD, TD, TAD

Full model list at the end of this description.

⚙️ Key Features

• 1.667 kg
• Supersedes 3183644, catalogued earlier as an intermediate lever and as an arm
• 58 applications across five engine series
• Cooling System belt drive component

🔌 Function

Holds the drive belt at the correct tension by carrying the idler against the belt run.

⚠️ Common Signs of Failure

• Belt squeal on start-up or a belt that will not hold tension
• Pivot worn, so the tensioner rocks or clonks
• Belt running off-line or edge-wearing against a flange
• Seized pivot that cannot be adjusted
• Bearing rumble audible with the belt removed

🛠️ Service Notes

• Nut 421541 shares the same 58 applications and is the fastener that goes with this drive arrangement
• Renew the belt at the same time and set the tension to the manual figure, as an over-tensioned belt wrecks the next pivot
• Check the pulley alignment after fitting rather than only the tension

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 421540 → Supersedes 3183644 → Supersedes 471313

OEM / Related Numbers

• 3183644 earlier number superseded by this part
• 471313 earlier number superseded by this part

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAMD74P-A, TAMD74P-B, TAMD74A, TAMD74C-A, TAMD74C-B, TAMD74L-A, TAMD74L-B
• Volvo Penta TD61A, TD61ACE, TD61AG, TD61AGP, TD61AP, TD61APB, TD61AW
• Volvo Penta TD71A, TD71ACE, TD71AG, TD71AGP, TD71AP, TD71APB, TD71AW
• Volvo Penta TID71A, TID71AG, TID71AGP, TID71AP, TID71APB
• Volvo Penta TWD610G, TWD610P, TWD610PB, TWD610V
• Volvo Penta TWD710G, TWD710P, TWD710PB, TWD710V
• Volvo Penta TAD730G, TAD730P, TAD730V
• Volvo Penta TD610G, TD610M, TD610V
• Volvo Penta TD630ME, TD630VE
• Volvo Penta TD730ME, TD730VE
• Volvo Penta TID61AG, TID61AGP
• Volvo Penta TWD630ME, TWD630VE
• Volvo Penta TWD740GE, TWD740VE
• Volvo Penta TAD740GE
• Volvo Penta TAD741GE
• Volvo Penta TAMD71B
• Volvo Penta TAMD75P-A
• Volvo Penta TD640VE
• Volvo Penta TD710G
• Volvo Penta TWD730ME
• Volvo Penta TWD731VE