Concave Leveling

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

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

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


A-Shield
B-Shield
C-Shield

H63545
H63546

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3. Remove separator inspection covers (A).


A-Separator Cover

H70754

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NOTE: Removing separator grate provides access for rotating rotor.

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


A-Cap Screw (4 used)
B-Separator Grate

H73877

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


A-Stop Bolt
B-Stop Bolt

H63912
H63911

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


A-Bottom Nut (2 used)
B-Top Nut (2 used)

H51982

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


A-Sector Gear
B-Worm Gear

H70751

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


A-Handle
B-Neutral Position

H63544

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

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).

H65419


A-Front Eyebolt Top Nut
B-Front Eyebolt Bottom Jam Nut
C-Rear Eyebolt Top Nut
D-Rear Eyebolt Bottom Jam Nut

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15. 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.


A-Stop Bolt (2 used)
B-Jam Nut
C-Head of Bolt
D-Jam Nut

H65421

Front Stop Bolt

H65420

Rear Stop Bolt

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

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.)


A-Cap Screw (4 used)
B-Separator Grate

H73877

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