Replacing Conditioner Drive Sheave—Roll Conditioner

If changing conditioner speed, replace sheave and belt. See your John Deere dealer.

1. 
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   A - Door

   Raise platform and engage lift cylinder stops.

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2. Open door (A).

3. 
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   A - Cap Screw (4 used)

   B - Mounting Flange

   C - Yoke

   Remove four cap screws (A).

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4. Slide yoke (C) toward machine. Turn and lift mounting flange (B) to remove from gear case driven sheave.

5. 
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   A - Cap Screws

   B - Idler Adjustment Nuts

   C - Draw Bolt Nut

   D - Cap Screws

   Loosen four cap screws (A) and (D), nuts (B) and (C).

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6. Push gear case forward and remove drive belt from driven sheave.

7. 
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   Remove bolt (A) and sheave. Set bolt aside.

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8. Install new sheave with bolt removed earlier. Torque bolt to specification.

   Item	Measurement	Specification
   Bolt	Torque	340 N·m (250 lb-ft)

9. 
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   A - Shield

   Raise left-hand front platform door to access drive sheave on gear case.

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10. Remove shield (A).

11. 
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    A - Belt

    B - Sheave

    Pull belt (A) toward front of machine and remove from sheave (B).

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12. Install new belt in reverse order of removal.

    IMPORTANT: When installing the left-hand converging drum shield, there should be a 1—6 mm (0.04—0.24 in.) clearance between shield and converging drum.

13. Install shield. Make sure clearance between shield and top of converging drum is to specification.

    Item	Measurement	Specification
    Shield-to-Converging Drum	Distance	1—6 mm (0.04—0.24 in.)

14. Install belt on new driven sheave. Adjust belt tension. (See ADJUSTING CONDITIONER DRIVE BELT TENSION—ROLL CONDITIONER in this section.)

15. 
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    A - Yoke

    B - Mounting Flange

    C - Cap Screws (4 used)

    Reinstall driveline: Slide yoke (A) toward sheave. Lift mounting flange (B) to install on gear case driven sheave.

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16. Install flange with four cap screws (C), (removed earlier). Tighten screws just snug at this time.

    See ADJUSTING ROLL TIMING (ROLL CONDITIONER) in this Section.