846831 Tensioner | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta tensioner from the Alternator, Charging, Electric Motor and Electric Drives group, weighing 0.143 kg and listed for 43 applications across the TMD, AD, D, AQAD, MD and TAMD series engines.

🚤 Compatibility

• Engine Family: TMD, AD, D, AQAD, MD, TAMD, BB

Full model list at the end of this description.

⚙️ Key Features

• 0.143 kg
• 43 applications across six engine series
• Alternator and charging drive
• Belt tensioning

🔌 Function

Holds the drive belt at its set tension, so the belt grips the pulleys without slipping and without overloading the bearings.

⚠️ Common Signs of Failure

• Belt squeal on start-up or as load comes on
• Belt dust below the pulleys
• Tensioner seized, so tension cannot be set
• Slot or pivot worn oval, letting the tension drift
• Charging output falling off as the belt slips

🛠️ Service Notes

• Tensioner 846902 at 0.172 kg is a separate part for the TD, TWD and TID engines, so order by part number
• Fit a new belt at the same time and re-tension after the first hour, since a new belt beds in

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAMD122A, TAMD122A/C, TAMD122D, TAMD122P-A, TAMD122P-B, TAMD122P-C
• Volvo Penta AD41P-B, AD41B, AD41, AD41A, AD41BJ
• Volvo Penta TAMD41B, TAMD41M-A, TAMD41A
• Volvo Penta AD31, AD31B
• Volvo Penta D41, D41B
• Volvo Penta 740A, 290A
• Volvo Penta TAMD102A, TAMD102D
• Volvo Penta TAMD31A, TAMD31B
• Volvo Penta TMD31A, TMD31B
• Volvo Penta TMD41A, TMD41B
• Volvo Penta AD30A
• Volvo Penta AQAD30A
• Volvo Penta BB740A
• Volvo Penta MD30A
• Volvo Penta MD31A
• Volvo Penta TAMD103A
• Volvo Penta TAMD121D
• Volvo Penta TAMD30A
• Volvo Penta TMD100C
• Volvo Penta TMD102A
• Volvo Penta TMD120B
• Volvo Penta TMD121C
• Volvo Penta TMD122A
• Volvo Penta TMD30A
• Volvo Penta TMD40C