CLAAS Pre-Concave Frame cat. no. 00 0757 400 2 Agrosikora

Pre-concave frame for CLAAS combine harvester – APS system support

CLAAS pre-concave framewith catalogue number 00 0757 400 2 is a structural component used in combine harvesters equipped with theAPS accelerated pre-separation system(Accelerated Pre-Separation). Its main task is to support and stabilise thepre-concave, which is responsible for early grain separation from the crop flow – before it reaches the main threshing drum. This is a key element affecting the efficiency and smooth operation of the entire threshing system in modern CLAAS combine harvesters.

Location of the pre-concave frame in the threshing system

The pre-concave frameis located in the front part of thecombine's threshing system, directlyunder the APS accelerator drum. This is where the first contact between the crop flow and the threshing system occurs. The design of the frame allows for stable mounting of thepre-concaveand precise maintenance of its working position, which is crucial for separation quality and the subsequent course of the threshing process.

Application and functionality of the CLAAS pre-concave frame

The main application of theCLAAS pre-concave frameis to provide durable and precise mounting for the concave operating within the APS system. Its design also influences the correctflow direction of pre-separated grainto further sections – primarily the cleaning system. Thanks to this, thethreshing drumis relieved, which translates into lower losses, better threshing quality, and longer service life of mechanical systems.

Key functions of this part include:

• Concave stabilisation– the rigid construction allows for secure and durable mounting of the working component, ensuring its effective operation under heavy loads.
• Guiding grain movement– the form and geometry of the frame influence the correct guidance of the material towards the sieve system.
• Mechanical resistance– the frame is made of durable materials resistant to wear and vibrations characteristic of the threshing zone.
• Precise positioning– ensures the correct working gap between the pre-concave and the APS drum, which directly affects separation quality.

CLAAS combine harvester models compatible with the pre-concave frame

Catalogue number00 0757 400 2refers to thepre-concave frame, intended forCLAAS combine harvesters with the APS system. It is used in many modern combine models, such as:

• CLAAS LEXION– a wide range of models from the 500, 600, 700, 800 series, as well as newer units with the APS (Accelerated Pre-Separation) system.
• CLAAS TUCANO– models from the 300, 400, 500 series, equipped with a threshing system with an accelerator drum and pre-concave.

Due to differences in model configurations and equipment versions, we recommend that you contact us.