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332.01.0019 Fan Tension Roller, Cooling System
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332.01.0019 Mercedes-Benz Compatible Fan Tension Roller

332.01.0019

Summary

This fan tension roller is designed for Mercedes-Benz heavy commercial vehicles to ensure constant tension within the cooling system. It is an essential component for maintaining proper belt alignment and preventing slip during engine operation. High-strength components ensure durability in heavy-duty service environments. Equivalent to OE Dayco APV2452 and Mercedes-Benz 0005501233.

Product identifiers
EAN Code8699031092843
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Compatible OEM Codes

  • MERCEDES BENZ
    • 000 550 22 33
    • 000 550 12 33
  • DAYCO
    • APV2452

Description

What does a fan tension roller do?

A fan tension roller is a drive component that keeps constant tension on the fan belt in a heavy commercial vehicle's cooling system and keeps the belt running on the pulleys without slipping. It sits at the front of the engine between the crankshaft pulley and the fan pulley, where it compensates for belt elongation and dampens vibrations to preserve the wrap angle.

Vehicle and engine compatibility

This component is specifically compatible with Mercedes-Benz vehicles. It functions as a critical part of the cooling drive line, ensuring that the fan maintains sufficient RPM to dissipate heat from the radiator effectively. Proper tensioning prevents belt slip, humming noises, and rising engine temperatures.

Installation and maintenance

When replacing this part, technicians should verify the pulley diameter and profile type to ensure an exact match with the original system architecture. It is vital to check mounting dimensions such as center bolt diameter and thread pitch to avoid centering errors during installation.

Troubleshooting and replacement

If a humming noise or visible belt slip is detected, it often indicates that the internal bearing has worn out. Replacing the roller helps prevent secondary damage to the belt or other pulleys in the cooling system. Check the compatibility list.

OE cross-reference

332.01.0019 (Fan Tension Roller Fan) is the equivalent of the Dayco and Mercedes-Benz OE numbers. This part directly replaces Dayco OE number APV2452. It also replaces Mercedes-Benz OE numbers 0005501233, 0005502233.

Other OEMs

DAYCO

  • APV2452

MERCEDES BENZ

  • A0005502233
  • A0005501233
  • 0005502233
  • 0005501233
  • 000.550.2233
  • 000.550.22.33
  • 000.550.1233
  • 000.550.12.33
  • 000 550 2233
  • 000 550 1233
  • 000 550 22 33
  • 000 550 12 33

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
DAYCO
MERCEDES BENZ

FAQ

What is the function of a fan tension roller?
The roller maintains constant tension on the fan belt within the cooling system, preventing slippage and ensuring the fan operates at the correct speed to dissipate engine heat.
Which vehicles are compatible with this part?
This specific component is designed for use in Mercedes-Benz heavy commercial vehicles, including trucks and buses.
How can I know if my fan tensioner needs replacement?
Common symptoms of a failing roller include audible humming or squealing noises, visible belt slip, or an increase in engine operating temperature.
What should I check before installing a new roller?
Technicians should verify that the pulley diameter, width, and profile type match the original part, and ensure mounting dimensions like thread pitch are correct.
What are the OE reference numbers of this part?
332.01.0019 directly replaces Dayco OE number APV2452. It also replaces Mercedes-Benz OE numbers 0005501233, 0005502233.