Installing Doffer Column

1. 
   N86512-UN-03SEP09

   
   N86513-UN-03SEP09

   
   N86514-UN-03SEP09

   A - Adjusting Screw

   B - Nut

   C - Cap Screws

   D - Inner Cabinet Seal

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

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2. Insert doffer column into row unit.

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

4. Install flange head cap screws (C) and sequentially tighten to specification.

   Item	Measurement	Specification
   Flange Head Cap Screws	Torque	50 N˙m (37 lb.-ft.)

5. NOTE: Replace plastic clips with new ones after they have been removed.

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

6. 
   N42169JA-UN-09JUN97

   A - Nuts

   Pack doffer bearing housing half-full of John Deere Moly High-Temperature (EP) Grease, or equivalent. (See GREASE in Fuels, Lubricants, and Coolants section.)

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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 head cap screws and nuts (A). Tighten to specifications.

   Item	Measurement	Specification
   Lower Bearing Housing Hardware	Torque	50 N˙m (37 lb.-ft.)

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

   1. 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.
      
      

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

      • If doffers are set too high, spindles do 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 can occur.
      
      

10. Install and tighten grease fitting. Lubricate bearing housing using John Deere Moly High Temperature (EP) Grease or equivalent. (See GREASE in Fuels, Lubricants, and Coolants section.)