OMH222883: 9880i STS Combine(9880i STS 715701- ), Block File: OUO6075_0003099_19

Concave Sections-Remove and Install

NOTE: For ease of removal, close concave completely.

1. Move handle (A) to shift rotor gear case in neutral position (B).

A-Rotor Drive Gear Case Handle
B-Neutral Position

OUO6075,0003099 -19-10SEP03-1/21

2. Remove cap screw, lock nut and open side shield (A).

3. Remove cap screw, lock nut and shields (B and C).

A-Shield
B-Shield
C-Shield

OUO6075,0003099 -19-10SEP03-2/21

4. Remove separator inspection covers (A).

5. Inspect wear on concave sections using AH204933 STS Combine Clearance Gauge.

A-Separator Cover

OUO6075,0003099 -19-10SEP03-3/21

NOTE: Removing separator grate provides access for rotating rotor for maximum concave to threshing element clearance.

6. Remove cap screws (A) and separator grate (B).

A-Cap Screws
B-Separator Grate

OUO6075,0003099 -19-10SEP03-4/21

7. Loosen cap screws (A) and remove left-hand sheet metal diverter (B).

A-Cap Screws
B-Diverter

OUO6075,0003099 -19-10SEP03-5/21

8. Place a piece of cardboard (A) or poly over conveyor augers. This provides protection for the augers and allows a smooth surface to remove the concaves.

A-Cardboard

OUO6075,0003099 -19-10SEP03-6/21

9. Remove shields (A).

A-Shields

OUO6075,0003099 -19-10SEP03-7/21

10. Remove quick-lock pins and front two separator covers (A) on right-hand side of combine.

A-Separator Cover

OUO6075,0003099 -19-10SEP03-8/21

11. Remove spring lock pin (A) from concave retainer (B).

12. Lift concave retainer and remove handle from each concave section.

A-Spring Pin
B-Concave Retainer

Concave Retainer

OUO6075,0003099 -19-10SEP03-9/21

13. Loosen 12 cap screws (A).

14. Fully open concave. This will allow the weight of the concaves to rest on the conveyor auger bed.

A-Cap Screws

OUO6075,0003099 -19-10SEP03-10/21

15. Remove 12 cap screws (A).

16. Remove cotter pins, pins (B) and "Z" bar (C).

17. Rotate rotor such that a gap in the threshing element pattern occurs at mid concave.

18. Remove center concave section.

19. Slide rear concave to the center position and remove.

20. Slide front concave to the center position and remove.

21. Install concaves in reverse order.

A-Cap Screws
B-Pins
C-"Z" Bar

OUO6075,0003099 -19-10SEP03-11/21

22. Install concave handle (A) into groove (B) on concave sections.

23. Install concave retainer (C) and retain with spring pin (D).

A-Handle
B-Groove
C-Concave Retainer
D-Spring Pin

OUO6075,0003099 -19-10SEP03-12/21

24. Position "Z" bar (C) over end of concaves and install 12 cap screws, but do not tighten.

25. Install pins (B).

26. Fully close concave.

A-Cap Screws
B-Pins
C-"Z" Bar

OUO6075,0003099 -19-10SEP03-13/21

27. Be sure the ends of concaves fit snug into "Z" bar; then tighten top row of cap screws (A) first.

28. Tighten bottom row of cap screws last.

29. Adjust concave level. (See Adjust Concave Level in this section.)

A-Cap Screws

OUO6075,0003099 -19-10SEP03-14/21

NOTE: Make sure top edge of separator cover is under clips.

30. Install separator covers (A).

A-Separator Covers

OUO6075,0003099 -19-10SEP03-15/21

31. Install shields (A).

A-Shields

OUO6075,0003099 -19-10SEP03-16/21

32. Install separator grate (B) and retain with cap screws (A).

A-Cap Screws
B-Separator Grate

OUO6075,0003099 -19-10SEP03-17/21

33. Remove cardboard (A) or poly from conveyor augers.

A-Cardboard

OUO6075,0003099 -19-10SEP03-18/21

34. Install diverter (B) to original position and tighten cap screws (A).

A-Cap Screws
B-Diverter

OUO6075,0003099 -19-10SEP03-19/21

35. Install separator inspection covers (A).

A-Separator Cover

OUO6075,0003099 -19-10SEP03-20/21

36. Install shields (B and C).

37. Close side shield (A).

38. Place rotor drive gear case in desired speed range.

A-Shield
B-Shield
C-Shield

OUO6075,0003099 -19-10SEP03-21/21