Balance Shafts Mercedes W169 OM640 Crankase Balancing Bearing Body A6400100536

Balance Shafts Mercedes W169 OM640 Crankase Balancing Bearing Body is a specialized assembly designed for the lubrication system of the OM640 diesel engine, used in the compact Mercedes A-Class W169 generation models. It is responsible for the stable operation of the oil pump and the reduction of torsional vibrations, which translates into smoother engine operation and better protection of mating components. This solution is dedicated to users who expect a precisely fitted component that complies with the manufacturer's factory specifications.

Specifications and technical data

• SKU: A6400100536
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6400100536
• Substitutable numbers: A6400100536, A 640 010 05 36
• Category: Other Engine Parts

Function of the balance shafts and oil pump in the OM640

The balance shaft assembly working with the oil pump in the OM640 engine is responsible for two key areas of engine performance:

• mechanical balancing of engine operation and reduction of vibrations transmitted to the block and body,
• stable driving of the oil pump, which helps maintain proper pressure in the lubrication system.

As a result, the lubrication system maintains proper efficiency across the full rev range, and engine components operate under more controlled conditions. In the case of diesel units such as the OM640, this is significant for the durability of the bearings, crankshaft, and other components interacting with engine oil.

Compatibility and fitment for Mercedes W169 Diesel OM640

The presented shaft assembly has been designed for the OM640 diesel engine used in the Mercedes A-Class W169 generation. This means that the geometry, mounting method, and interaction with the oil pump are consistent with the factory solution, which facilitates installation and subsequent operation. Using a component from the same design family allows for maintaining:

• correct oil routing in the lubrication system,
• proper power transmission to the oil pump,
• consistency with the factory tolerances and design assumptions of the OM640 engine.

For the user, this means the ability to restore the correct operation of the lubrication system and reduce unwanted vibrations without the need to use replacement solutions with uncertain fitment.

Component characteristics and service application

The offered component comes from the Mercedes brand, which in practice translates into maintaining the manufacturer's original design concept. In service applications, the oil pump balance shaft assembly is particularly important in situations where:

• excessive engine vibration is detected at low and medium RPMs,
• intervention in the lubrication system is necessary due to mechanical wear,
• a comprehensive rebuild of the OM640 engine in a Mercedes W169 is being performed.

Selecting a component that complies with factory specifications allows for maintaining predictable engine operating parameters, which is important both from the point of view of durability and vehicle comfort.

Practical benefits of replacing the balance shaft assembly

Replacing the oil pump balance shaft assembly in a Mercedes W169 with an OM640 engine can bring measurable operational benefits. The most important include:

• more even engine operation and reduction of vibrations felt in the cabin,
• more stable oil pump operating conditions, which promotes the maintenance of a proper oil film,
• reduced risk of accelerated wear of lubricated components,
• better repeatability of engine operating parameters after the repair is performed.

For workshops specializing in the maintenance of Mercedes diesel engines, this is a component that allows for repairs to be carried out in accordance with the manufacturer's requirements, without compromises in terms of fitment.

Expanding the scope of repairs and additional materials

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as shafts, drive modules, or additional components interacting with the lubrication system, check the available parts in the Other Mercedes category.

To compare solutions used in different brands and engine versions, including high-performance units, the material describing design differences in sports vehicle variants may be helpful – you can find them in the article Audi RS vs other models – what is hidden under the hood and chassis?, which discusses, among other things, the specifics of engines, braking systems, and chassis in the context of selecting spare parts.