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332.01.0004 Fan Tension Roller, Cooling System
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332.01.0004 Mercedes-Benz Compatible Fan Tension Roller

332.01.0004

Summary

This fan tension roller is designed for the cooling system of Mercedes-Benz heavy commercial vehicles. It ensures consistent belt tension and prevents slipping to maintain optimal engine temperature. Engineered with high-strength components for heavy-duty service. Equivalent to OE Dayco APV2409 and Mercedes-Benz 0005500633.

Product identifiers
EAN Code8699031092539
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Compatible OEM Codes

  • MERCEDES BENZ
    • 000 550 06 33
  • DAYCO
    • APV2409

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.

Compatibility and fitment

This component is essential for the stability of the fan drive line, sitting between the crankshaft and the fan pulley. By maintaining the correct wrap angle and compensating for belt elongation, it prevents belt slip, humming noises, and rising engine temperatures. This part is compatible with Mercedes-Benz applications and ensures reliable heat dissipation through the radiator.

Installation and maintenance

For proper installation, technicians should verify the pulley profile and mounting dimensions against the original part. It is critical to ensure that the tensioning type matches the existing engine architecture, whether it is a spring-loaded automatic type or a fixed-adjustment model. Regular checks of the bearing integrity are recommended to prevent chain reaction failures in the cooling system.

Troubleshooting guidance

If you notice belt squealing or overheating symptoms, check this component immediately. Selecting based on engine code and OE reference ensures correct fitment for specific heavy commercial vehicle configurations.

OE cross-reference

332.01.0004 (Fan Tension Roller Fan) is the equivalent of the Dayco and Mercedes-Benz OE numbers. This part directly replaces Dayco OE number APV2409. It also replaces Mercedes-Benz OE number 0005500633.

Other OEMs

DAYCO

  • APV2409

MERCEDES BENZ

  • A0005500633
  • 0005500633
  • 000.550.0633
  • 000.550.06.33
  • 000 550 0633
  • 000 550 06 33

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
DAYCO
MERCEDES BENZ

FAQ

What are the symptoms of a failing fan tension roller?
Common symptoms include belt slipping, audible humming or squealing noises, and rising engine operating temperatures due to inefficient fan speed.
Can this part be used in any Mercedes-Benz truck?
Selection must be based on the specific engine code and OE reference to ensure correct pulley diameter and mounting dimensions for your specific model.
How does this roller affect engine temperature?
By maintaining constant tension on the fan belt, it ensures the fan rotates at the required speed to dissipate heat through the radiator effectively.
What should I check before installing a new roller?
Verify that the pulley profile (ribbed or flat) and mounting bolt diameter match the removed part exactly to ensure proper centering.
What are the OE reference numbers of this part?
332.01.0004 directly replaces Dayco OE number APV2409. It also replaces Mercedes-Benz OE number 0005500633.