331.03.0006 Fan Belt Tensioner for Volvo Trucks

What does a fan belt tensioner do?

This fan belt tensioner is a critical spring-loaded component within the engine cooling system of heavy commercial vehicles. It maintains the correct tension on the belt driving the fan by automatically compensating for slack caused by heat and mileage. By ensuring the belt transmits torque without slipping, it allows the cooling fan to operate at its designed speed to regulate engine temperature.

Vehicle and engine compatibility

This part is engineered for high-duty cycles and is compatible with a wide range of Volvo models, including the FM7, NH12, FL12, FH12, and FH16 series. It also fits various configurations such as the VHD, VNL, and B12, supporting engines like the D12A, D12C, D16C, and TD122. Additionally, it is suitable for Renault Trucks Magnum with DXi12 engines.

Installation and maintenance

For professional installation, technicians should verify the pulley profile and mounting geometry against the current service manual. Ensuring correct spring preload and torque during assembly is essential for preventing premature wear of the bearing or belt. Regular inspection of the tensioner arm and pulley movement can help prevent overheating issues caused by belt slippage.

Preventive maintenance guidance

Maintaining stable performance under extreme thermal conditions is vital for fleet reliability. This component helps prevent sudden engine temperature spikes by ensuring consistent drive torque for the cooling assembly.

OE cross-reference

331.03.0006 (Fan Belt Tensioner Fan) is the equivalent of the Dayco and Volvo OE numbers. This part directly replaces Dayco OE numbers APV2450, APV3235. It also replaces Volvo OE numbers 1664973, 3154315, 8149798.