How to Remove the Preconcave on CLAAS LEXION 480

This guide provides step-by-step instructions for removing the preconcave on CLAAS LEXION 480 combine harvesters.

Related Contents:

CLAAS CDS 7.5 Diagnostic Software 2021 2020 Free Download
CLAAS 4 CAN Diagnostic Interface
Claas WebTIC Offline Repair & Service 2024 2015 Free Download

Procedure: Removing the Preconcave

1. Lower the Concave

• Adjust the concave to its lowest position.

2. Remove the Feed Rake Conveyor

• Refer to page 3.1.1 for detailed instructions.

3. Secure the Machine

• Place stands under the front axle for safety and stability.
• Ensure the front axle is securely supported.

4. Remove the Front Wheels

• Detach both front wheels to provide access.

5. Remove Guards and Covers

• Remove the guard (S) and mudguards (K) from the right-hand side.
• Remove the drum inspection cover (A).

6. Remove Fasteners and Plugs

• Unscrew and remove the hex bolts (T) on both sides of the machine.
• Remove the screw plug (S) on both sides.
• If equipped with the maize option, remove the feed plate for the stone trap.

7. Remove the Feed Plate and Stone Trap

• Remove the feed plate (B) and cover (K).
• Unscrew the turn lock nut (M) and fold down the stone trap (P).

8. Detach the Preconcave Segments

• Unscrew the hex bolts securing the preconcave segments (V).
• Raise and remove the segments.

9. Access the Preparation Floor

• Unscrew and fold open the cover (F) on the preparation floor.

10. Remove the Brace and Disawner Plates

• Unscrew hex bolt (K) to remove brace (G).
• Lift and remove both disawner plates (E) from the front of the machine.

11. Support the Preconcave

• Use 170mm high squared timber (H) to support the underside of the preconcave.

12. Detach the Preconcave Mounting

• Pull out the split pins from the mounting plates (L) of the main concave.
• Loosen the set collars (R) and remove the mounting plates (L).

13. Remove Suspension Bolts

• Remove bolts (A and B) from the center and front concave suspension on both sides.

14. Remove Sealing Plates and Wear Strips

• Pull out sealing plates (3 and 7).
• Remove wear strips (4) from the front sealing plates (3).

15. Remove the Preconcave

• Raise the rear of the preconcave (1) and slide it over the edge of the main concave.
• Slowly pull the preconcave out towards the front using the squared timber as a guide.

More repair case for CLAAS,please refer to CLAAS Trouble Repair