331.03.0003 Volvo and Renault Trucks Fan Belt Tensioner

What does a fan belt tensioner do?

A fan belt tensioner is a critical component within the engine cooling system that maintains the correct tension on the fan belt. This ensures consistent belt movement and prevents slippage or premature wear during operation.

Vehicle and engine compatibility

This part is compatible with a wide range of heavy commercial vehicles, including Volvo models such as the FM, FH, FMX, and various bus chassis like the B9 and B11. It is also fitted to Renault Trucks models including the T, C, K, Magnum, and Premium series. These components are designed to withstand the rigorous thermal and mechanical demands of heavy-duty engine operation.

Installation and maintenance

To ensure proper function, technicians should inspect the tensioner during routine cooling system maintenance. Correct installation prevents excessive vibration in the fan assembly and protects belts from rapid degradation. It is essential to verify fitment against specific engine types such as D13 or DXi to ensure perfect alignment within the drive system.

System stability guidance

Maintaining a stable belt tension helps prevent overheating by ensuring the fan operates at the required speed throughout all driving conditions.

OE cross-reference

331.03.0003 (Fan Belt Tensioner Fan) is the equivalent of the Dayco, Renault Trucks and Volvo OE numbers. This part directly replaces Dayco OE numbers APV1054, APV1151. It also replaces Renault Trucks OE numbers 7420739751, 7420935521, 7421422765 and Volvo OE numbers 20739751, 20935521, 21422765, 3979979, 85013020.