Concave Sections (Active Concave Isolation)—Remove and Install

1. 

   
   H117012-UN-28MAR16

   Threshing Clearance Adjust

   Concave sections are heavy and awkward to handle. Another person may be needed to remove and install concave sections.

   Start engine and press threshing clearance adjust switch.

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2. To allow easier access to “Z” bar hardware, open threshing clearance to 5.

   Threshing clearance may need to be increased depending on machine configuration.

3. Shut OFF engine, set park brake and remove key.

4. 
   H96927-UN-17JUN10

   A - Handle

   B - Neutral Position

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

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5. 
   H111239-UN-13MAY14

   A - Separator Covers

   Remove shielding as needed to access separator inspection covers.

   Remove separator inspection covers (A).

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6. 
   H109597-UN-18DEC13

   A - Cap Screws

   B - Diverter

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

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

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7. 
   H96929-UN-17JUN10

   A - Separator Cover

   Remove shielding as needed to access separator inspection covers.

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8. Remove quick-lock pins and front two separator covers (A) on the right-hand side of the machine.

9. 
   H109919-UN-27FEB14

   
   H109920-UN-27FEB14

   A - Leveling Cap Screw (2 used)

   B - “Z” Bar

   C - Nut (2 used)

   D - Nut (2 used)

   E - Nut (2 used)

   Remove concave leveling cap screws (A) from the bracket on “Z” bar (B) and install through the rail to hold concave and “Z” bar assembly.

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10. Hand tighten nut (C) against “Z” bar bracket and slightly tighten nut (D) against the rail on both sides.

    Verify that there is adequate space between nut (E) and rail for zeroing adjustments. Do NOT tighten the nut against the rail.

11. 
    H109276-UN-16OCT13

    A - Rubber Seal (2 used)

    Remove base of the rubber seal (A) and lift upward on both cylinders.

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12. 
    H111261-UN-22MAY14

    A - Pin (2 used)

    B - Cylinder Safety Stop (2 used)

    Remove pin (A) and cylinder safety stop (B) on both cylinders.

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13. 
    H109683-UN-22JAN14

    A - Jam Nut (2 used)

    B - Cylinder Stop (2 used)

    Loosen jam nut (A) from the cylinder stop (B) and lower stop on both cylinder rods.

    Jam nut and stop must be lowered at least 15 mm (19/32 in) from current location.

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14. 
    H109593-UN-16DEC13

    A - Quick-Lock Pin (2 used)

    B - Pin (2 used)

    Remove quick-lock pin (A) and pin (B) from the cylinder rod on both sides.

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15. 
    H75040-UN-04FEB03

    Concave Retainer

    A - Spring Pin

    B - Concave Retainer

    Remove spring pin (A) from the concave retainer (B).

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16. Lift concave retainer and remove the handle from each concave section.

17. 
    H109599-UN-19DEC13

    A - Cap Screw (14 used)

    Loosen cap screws (A).

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18. 
    H109677-UN-21JAN14

    
    H111243-UN-16MAY14

    A - Leveling Cap Screw (2 used)

    B - Nut (2 used)

    C - Linkage Arm (2 used)

    Use leveling cap screw (A) to adjust “Z” bar and concaves up approximately 10 mm (13/32 in) or until middle concave can be easily removed.

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19. Depending on machine configuration, “Z” bar may need to be removed.

    If removing “Z” bar, remove nuts (B) and linkage arms (C).

20. 
    H109599-UN-19DEC13

    A - Cap Screw and Nut (14 used)

    Remove cap screws and nuts (A).

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

    Remove center concave section.

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

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

24. Inspect wear on concave sections, threshing elements and threshing tines using KXE10110 Clearance Gauge.

25. Install concaves in reverse order.

26. 
    H75041-UN-04FEB03

    A - Handle

    B - Groove

    C - Concave Retainer

    D - Spring Pin

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

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

28. 
    H109684-UN-22JAN14

    
    H111244-UN-16MAY14

    A - Cap Screw and Nut (6 used)

    B - Cap Screw and Nut (8 used)

    C - Linkage Arm (2 used)

    D - Nut (2 used)

    If “Z” bar was previously removed, install at this time.

    Using leveling cap screws, lower “Z” bar and concaves approximately 10 mm (13/32 in) or equal distance of amount raised previously.

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29. Verify that concave sections are tight against each other with no gaps prior to tightening hardware.

    Verify ends of concaves fit snug into ”Z” bar; then tighten top row of the cap screws and nuts (A) first.

30. Tighten bottom row of the cap screws and nuts (B) last.

31. If “Z” bar was removed, install linkage arms (C) using nuts (D).

32. Adjust concave level. See Concave Leveling (Active Concave Isolation) later in this section.

33. 
    H96929-UN-17JUN10

    A - Separator Covers

    Verify that top edge of separator cover is under clips.

    Install separator covers (A).

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34. Install shielding previously removed to access separator inspection covers.

35. Remove cardboard or poly from conveyor augers.

    
    H109597-UN-18DEC13

    A - Cap Screw (4 used)

    B - Diverter

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

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36. 
    H111239-UN-13MAY14

    A - Separator Cover

    Install separator inspection covers (A).

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37. Install shielding previously removed to access separator inspection covers.

38. Shift rotor drive gear case to previous position.