331.02.0005 MAN Compatible Fan Belt Tensioner

What does a fan belt tensioner do?

This fan belt tensioner is a critical component within the cooling system of heavy commercial vehicles, designed to maintain the correct tension on the belt driving the fan. By applying constant pressure through a spring-loaded mechanism, it automatically compensates for any slack caused by belt stretch or heat expansion. This ensures the fan rotates at its intended speed to provide effective engine cooling.

Vehicle and engine compatibility

This part is specifically designed for compatibility with MAN LION'S REGIO (including L 360, L 400, C 350, and others), MAN LION'S COACH (including C 320, C 480, and L 505 models with D2676 engines), and MAN HOCL series such as 18.350 and 25.430. It serves as a reliable replacement to maintain engine temperature stability in these heavy-duty applications.

Installation and maintenance

For optimal performance, technicians should inspect the tensioner during routine cooling system maintenance. It is important to check for uneven pulley wear or spring fatigue to prevent belt slippage. When replacing the unit, ensure that the mounting torque meets the manufacturer's specifications to maintain balanced pressure on the belt.

Preventative maintenance guidance

Maintaining a stable tension profile helps prevent premature wear on both the belt and the water pump pulley. Consult your authorized distributor to verify fitment for your specific engine configuration.

OE cross-reference

331.02.0005 (Fan Belt Tensioner Fan) is the equivalent of the MAN OE numbers. This part directly replaces MAN OE numbers 51958007446, 51958007460, 51958007473.