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331.01.0011 Fan Belt Tensioner, Cooling System
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331.01.0011 Fan Belt Tensioner for Mercedes-Benz

331.01.0011

Summary

This heavy-duty fan belt tensioner is designed for Mercedes-Benz vehicles to ensure precise belt tension within the cooling system. It maintains the correct tension for the fan belt, preventing slippage and ensuring optimal engine cooling performance in heavy commercial vehicle applications. Equivalent to OE Dayco APV1095 and Mercedes-Benz 4572000070.

Product identifiers
EAN Code8699031092492
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Compatible OEM Codes

  • MERCEDES BENZ
    • 457 200 34 70
    • 457 200 17 70
    • 457 200 00 70
  • DAYCO
    • APV1095

Description

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 constant pressure on the belt driving the fan. By applying balanced pressure, it allows the belt to transmit torque effectively without slipping, which is essential for maintaining the fan at its designed rotational speed.

Vehicle compatibility and application

This component is compatible with Mercedes-Benz vehicles. It serves as a vital link in the cooling chain, ensuring that engine temperature remains regulated even under high-load operating conditions in trucks and buses.

Maintenance and installation guidance

For workshop technicians and fleet managers, regular inspection of the tensioner is vital. A faulty tensioner can lead to belt slippage or premature wear of other components. When performing maintenance, ensure the pulley rotates smoothly and the spring mechanism provides consistent resistance to prevent sudden cooling failures.

Ensuring cooling system reliability

Selecting a high-strength component ensures that the cooling system operates reliably despite the thermal expansion and stretching that occurs during high-mileage service cycles.

OE cross-reference

331.01.0011 (Fan Belt Tensioner Fan) is the equivalent of the Dayco and Mercedes-Benz OE numbers. This part directly replaces Dayco OE number APV1095. It also replaces Mercedes-Benz OE numbers 4572000070, 4572001770, 4572003470.

Other OEMs

DAYCO

  • APV1095

MERCEDES BENZ

  • A4572003470
  • A4572001770
  • A4572000070
  • 4572003470
  • 4572001770
  • 4572000070
  • 457.200.3470
  • 457.200.34.70
  • 457.200.1770
  • 457.200.17.70
  • 457.200.0070
  • 457.200.00.70
  • 457 200 3470
  • 457 200 1770
  • 457 200 0070
  • 457 200 34 70
  • 457 200 17 70
  • 457 200 00 70

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
DAYCO
MERCEDES BENZ

FAQ

What is the function of a fan belt tensioner?
The tensioner applies constant pressure to the fan belt, automatically taking up any slack caused by heat or mileage to prevent slipping and ensure consistent cooling.
Which vehicles is this part compatible with?
This specific component is designed to be compatible with Mercedes-Benz heavy commercial vehicle systems.
How can I identify a failing tensioner?
Technicians should look for signs of excessive belt vibration, squealing noises, or visible uneven wear on the belt edges.
Why is maintaining belt tension important?
Proper tension ensures the fan rotates at the correct speed, which is essential for regulating engine temperature and preventing overheating in heavy-duty engines.
What are the OE reference numbers of this part?
331.01.0011 directly replaces Dayco OE number APV1095. It also replaces Mercedes-Benz OE numbers 4572000070, 4572001770, 4572003470.