Concave Leveling

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

   Remove shielding as needed to access separator inspection covers.

   
   H96446-UN-20MAY10

   A - Separator Cover

---




2. Remove separator inspection covers (A).

3. NOTE: Removing separator grate provides access for rotating rotor.

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

   
   H96447-UN-20MAY10

   A - Cap Screw (4 used)

   B - Separator Grate

---




4. Back off stop bolts (A and B).

   
   H63912-UN-15MAY00

   
   H63911-UN-15MAY00

   A - Stop Bolt

   B - Stop Bolt

---




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

   
   H51982-UN-16FEB99

   A - Bottom Nut (2 used)

   B - Top Nut (2 used)

---




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

   
   H96450-UN-20MAY10

   Worm and Sector Gear

   
   BM000086-UN-23APR15

   S660 Rice Configuration

   A - Sector Gear

   B - Worm Gear

   C - Gear Tooth

   NOTE: To S660 model rice configuration, use concave adjusts switch to adjust concave up until worm gear (B) and sector gear (A) leaving one gear tooth (C) out, as illustrated.

---




7. Move handle (A) to shift rotor gearcase in neutral position (B).

   
   H96927-UN-17JUN10

   A - Handle

   B - Neutral Position

---




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

   
   H65419-UN-22NOV00

   A - Front Eyebolt Top Nut

   B - Front Eyebolt Bottom Lock Nut

   C - Rear Eyebolt Top Nut

   D - Rear Eyebolt Bottom Lock Nut

---




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

10. 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 lock nut.

11. 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 lock nut.

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

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

14. 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.

    
    H65421-UN-22NOV00

    Front Stop Bolt

    
    H65420-UN-22NOV00

    Rear Stop Bolt

    A - Stop Bolt (2 used)

    B - Lock Nut

    C - Head of Bolt

    D - Lock Nut

---




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

    
    H96447-UN-20MAY10

    A - Cap Screw (4 used)

    B - Separator Grate

---




16. Shift rotor drive gearcase to previous position.

17. Install previously removed separator inspection covers and shields.

18. Calibrate concave position from inside cab. (See Calibration Procedures section for further information.)