331.02.0004 MAN Compatible Fan Belt Tensioner

A fan belt tensioner is a mechanical component in the cooling system of heavy commercial vehicles that keeps the belt driving the fan at the correct tension. This unit is essential for preventing belt slip and ensuring that the cooling fan operates at its designed speed, which is critical for maintaining stable engine temperatures under heavy loads.

This specific tensioner is compatible with various MAN models, including TGM I, TGL I, and Lions City series. It is suitable for engines such as the D0836 and D0834, providing reliable performance across diverse applications like buses, trucks, and construction machinery. The component is engineered to withstand high heat and constant engine vibration.

When inspecting the cooling system, technicians should check for irregular belt vibrations or squealing noises which may indicate a worn tensioner. Maintaining proper tension helps prevent premature wear on the fan pulley and the belt itself. Always ensure correct mounting torque according to service manuals during installation.

Consult your authorized distributor to verify specific fitment for your vehicle model.

OE cross-reference

331.02.0004 (Fan Belt Tensioner Fan) is the equivalent of the Dayco and MAN OE numbers. This part directly replaces Dayco OE number APV1128. It also replaces MAN OE numbers 51958007434, 51958007437, 51958007467, 51958007479.