Feeder House Variable Speed-Belt Replacement

causym CAUTION: Lower variable sheave is under spring tension; if belt is removed, it will snap back to a closed position.

1. Start engine, engage separator and move switch to fast idle. Adjust feeder house drive belt to slow front shaft speed.

causym CAUTION: Shut OFF engine, set parking brake and remove key.

2. Disengage separator, stop engine and remove key.

3. Lower safety stop and remove left-hand feeder house shields.

4. Look under rubber boot (A) to verify if upper sheaves are fully open. At low speed position, outer sheave half bulb will be against bracket (B).

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Shield Removed for Clarity


A-Rubber Boot
B-Bracket

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5. Remove shields (A).

6. Loosen idler nut (B) to relieve belt tension.


A-Shields
B-Nut

H85579

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7. Loosen nuts (A) to relieve tension on reel drive belt (B).


A-Nut
B-Belt

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8. Remove and retain nuts (A) and bracket (B).

9. Loosen nuts (C) to allow upper sheave assembly to move.


A-Nuts (2 Used)
B-Bracket
C-Nuts (3 Used)

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NOTE: Nut (C) may be moved and jammed against nut (A). Together these nuts can be used to turn tensioner bolt.

10. Loosen nut (A) away from bracket (B) until a 3 mm (1/8 in.) gap exists between either side of bracket.

11. Tighten nut (C) against nut (A).

NOTE: Threading the bolt into the tensioner allows the sheave to move forward to remove the belt.

12. Use nut (A) to screw threaded bolt into tensioner (D).

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A-Nut
B-Bracket
C-Nut
D-Tensioner

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13. Remove cap screw and nut (A) to swing bracket (B) out of way.

14. Remove belt (C) from sheaves.

15. Install new belt and adjust tension. (See Adjusting Variable Speed Feeder House Belt).

16. Install bracket and feeder house shields previously removed.


A-Cap Screw and Nut
B-Bracket
C-Belt

H85580

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