Install Doffer Column

1. Clean top of doffer column and mounting flange to remove any debris from mating surfaces.

2. Insert doffer column into picking unit.

3. If necessary, turn adjusting screw (B) clockwise until mounting flange meets top of doffer column. Leave nut (A) loose.


A-Nut
B-Adjusting Screw

N42182YH

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4. Install flange cap screws (A) and sequentially tighten to specifications.

Specification

Flange Cap Screws -Torque 50 N·m (37 lb-ft)


A-Flange Cap Screws

N42166UD

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5. Make sure inner cabinet seal (A) is retained with plastic clips.


A-Inner Cabinet Seal

N91323Q1

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6. Pack doffer bearing housing half-full of John Deere Moly High-Temperature (EP) Grease, or equivalent. See GREASE in LUBRICATION AND MAINTENANCE section.

7. Position bearing housing so grease fitting is to the rear of the unit.

8. Slide housing through bottom of cabinet onto doffer column and attach with flange cap screws and nuts (A). Tighten to specifications.

Specification

Lower Bearing Housing Hardware -Torque 50 N·m (37 lb-ft)

9. Adjust doffer column height before operating picking unit. See ADJUSTING DOFFER COLUMN HEIGHT in this section.

The doffer column height is correct when:

  • Doffer pads are parallel to top of spindles when spindles are fully under pads.
  • Spindles lightly touch (zero clearance) doffer pads as they enter the doffer assembly and clear when leaving.

If doffer column is not correctly adjusted, the following occurs:

  • If doffers are set too high, spindles will not clean properly.
  • If doffers are set too low, excessive wear of doffer pads, premature spindle bushing and barb wear, and possible bending of the cam followers and picker bar will occur.

10. Reinstall and/or tighten grease fitting. Lubricate bearing housing using John Deere Moly High Temperature (EP) Grease or equivalent.

N42169JA


A-Bearing Housing Hardware

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