331.02.0006 MAN Compatible Fan Belt Tensioner

What does a fan belt tensioner do?

The fan belt tensioner is a critical mechanical component within the cooling system of heavy commercial vehicles. It maintains the driving belt at the correct tension by applying constant pressure, preventing slippage and ensuring the fan rotates at its designed speed to regulate engine temperature.

Vehicle compatibility and fitment

This unit is specifically engineered to fit a wide range of MAN vehicles, including the Lion's City, HOCL, and various Lion's Regio series. It is also suitable for MAN SL II, NG, NL, and Lion's Classic models, providing reliable performance across these heavy-duty engine configurations.

Maintenance and installation guidance

Maintenance of this component is vital for preventing belt wear and overheating. Technicians should inspect the tensioner during routine service intervals for signs of excessive vibration or noise. Proper installation ensures the spring-loaded arm maintains balanced pressure under high heat and constant engine vibration.

Selection and reliability

Selecting a high-strength component ensures long-term stability within the cooling chain. Check the compatibility list to ensure correct fitment for your specific MAN model and engine variant.

OE cross-reference

331.02.0006 (Fan Belt Tensioner Fan) is the equivalent of the Dayco and MAN OE numbers. This part directly replaces Dayco OE number APV2973. It also replaces MAN OE numbers 51958007444, 51958007461, 51958007481.