Concave Leveling

1. NOTE:

   
   H63545-UN-12APR00

   
   H63546-UN-12APR00

   A - Shield

   B - Shield

   C - Shield

   Round bar concave covers (if installed) should be removed prior to beginning concave leveling.

   Remove quick-lock pins and open side shield (A).

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2. Remove quick-lock pins and remove shields (B and C).

3. 
   H96446-UN-20MAY10

   A - Separator Cover

   Remove separator inspection covers (A).

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4. NOTE:

   
   H96447-UN-20MAY10

   A - Cap Screw (4 used)

   B - Separator Grate

   Removing separator grate provides access for rotating rotor.

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

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5. 
   H63912-UN-15MAY00

   
   H63911-UN-15MAY00

   A - Stop Bolt

   B - Stop Bolt

   Back off stop bolts (A and B).

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6. 
   H51982-UN-16FEB99

   A - Bottom Nut (2 used)

   B - Top Nut (2 used)

   Loosen jam nuts (A) and back off nuts (B) five turns each.

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7. 
   H96450-UN-20MAY10

   A - Sector Gear

   B - Worm Gear

   Use concave adjust switch to adjust concave up until worm gear (B) and sector gear (A) are bottomed out in the up position.

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8. 
   H63544-UN-12APR00

   A - Handle

   B - Neutral Position

   Shift rotor drive gearcase to neutral position (B) using handle (A).

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9. 
   H65419-UN-22NOV00

   A - Front Eyebolt Top Nut

   B - Front Eyebolt Bottom Jam Nut

   C - Rear Eyebolt Top Nut

   D - Rear Eyebolt Bottom Jam Nut

   Adjust front eyebolt top nut (A) slowly until elements “tick” concave while rotor is rotating. Back off three complete turns.

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10. Adjust rear eyebolt top nut (C) slowly, until elements “tick” concave while rotor is rotating. Back off three complete turns.

11. Adjust front eyebolt top nut (A) down slowly until elements “tick” concave. Back off slowly until “tick” stops. As soon as “tick” has stopped back off one complete turn and tighten top jam nut.

12. Adjust rear eyebolt top nut (C) down slowly, until elements “tick” concave. Back off slowly until “tick” stops. As soon as “tick” has stopped back off one complete turn and tighten top jam nut.

13. Tighten bottom front concave adjustment nut. Hold front eyebolt top nut (A) with open end wrench and tighten front eyebolt bottom jam nut (B).

14. Tighten bottom rear concave adjustment nut. Hold rear eyebolt top nut (C) with open end wrench and tighten rear eyebolt bottom jam nut (D).

15. 
    H65421-UN-22NOV00

    Front Stop Bolt

    
    H65420-UN-22NOV00

    Rear Stop Bolt

    A - Stop Bolt (2 used)

    B - Jam Nut

    C - Head of Bolt

    D - Jam Nut

    Adjust front and rear concave stop bolt (A) by tightening bottom nut (B) until head of bolt (C) is snug against concave. Tighten top nut (D) while holding bottom nut (B) with open end wrench.

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16. 
    H96447-UN-20MAY10

    A - Cap Screw (4 used)

    B - Separator Grate

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

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17. Shift rotor drive gearcase to desired position.

18. Install separator inspection covers and shields.

19. Calibrate concave position from inside cab. (See Calibration Procedures section.)