Attach mower-conditioner correctly. (See Attaching and Detaching section.)

Roll Conditioner; Conditioner rolls too close.

Adjust roll spacing. (See ADJUSTING ROLL SPACING [ROLL CONDITIONER] in Operating the Mower-Conditioner section.)

Loose hardware.

Check tightness of hardware.

Loose hex shaft bearing supports.

Check tightness of hex shaft bearing supports on left-hand side of tongue.

Damaged hex shaft bearing/supports inside tongue.

Remove plastic plugs from left-hand side of tongue and check. Replace if necessary (See your John Deere dealer.)

Impeller Conditioner; Impeller tines missing.

Replace missing tines.

Reduce pressure. (See ADJUSTING CONDITIONER ROLL PRESSURE [ROLL CONDITIONER] in Operating the Mower-Conditioner section.)

Impeller Conditioner; Excessive rotor speed.

Reduce rotor speed. (See CHANGING ROTOR SPEED [IMPELLER CONDITIONER] in Operating the Mower-Conditioner section.)

Impeller Conditioner; Conditioning hood too close to rotor.

Reposition conditioning hood. (See ADJUSTING CONDITIONING INTENSITY [IMPELLER CONDITIONER] in Operating the Mower-Conditioner section.)

Disengage tractor PTO and stop engine. When all moving parts have completely stopped, remove foreign objects.

Excessive roll pressure.

Reduce pressure. (See ADJUSTING CONDITIONER ROLL PRESSURE [ROLL CONDITIONER] in Operating the Mower-Conditioner section.)

Cutting height too low.

Raise cutterbar. (See ADJUSTING CUT HEIGHT—TURNBUCKLE TOP LINK OR HYDRAULIC TILT CONTROL in Operating the Mower-Conditioner section.)

Operating in very heavy crop.

Reduce ground speed or cut less than full width of cutterbar.

Incorrect PTO speed.

Correct PTO speed.

Operating in very long crop.

Increase roll spacing. (See ADJUSTING ROLL SPACING [ROLL CONDITIONER] in Operating the Mower-Conditioner section.)

Increase cutting height by reducing platform angle. (See ADJUSTING CUT HEIGHT—TURNBUCKLE TOP LINK OR HYDRAULIC TILT CONTROL in Operating the Mower-Conditioner section.)

Adjust gauge shoes. (See ADJUSTING CUT HEIGHT—TURNBUCKLE TOP LINK OR HYDRAULIC TILT CONTROL in Operating the Mower-Conditioner section.)

Platform too heavy for wet conditions.

Adjust float springs. (See ADJUSTING PLATFORM FLOAT IN OPERATING THE MOWER-CONDITIONER section.)

Impeller conditioner hood set too low.

Raise conditioner hood.

Bent or broken knives.

Replace knives. (See REMOVING KNIVES AND INSTALLING KNIVES in Service section.)

Adjust float springs. (See ADJUSTING PLATFORM FLOAT IN OPERATING THE MOWER-CONDITIONER section.)

Incorrect cutterbar angle.

Change cutterbar angle (tilt down). (See ADJUSTING CUT HEIGHT—TURNBUCKLE TOP LINK OR HYDRAULIC TILT CONTROL in Operating the Mower-Conditioner section.)

Impeller Conditioner; Slow rotor speed.

Increase rotor speed. (See CHANGING ROTOR SPEED [IMPELLER CONDITIONER] in Operating the Mower-Conditioner section.)

Dull knives.

Reverse or replace knives. (See REMOVING KNIVES AND INSTALLING KNIVES in Service section.)

Knives incorrectly installed.

Install knives correctly. (See INSTALLING KNIVES in Service section.)

Excessive ground speed.

Reduce ground speed.

Incorrect cutting height.

Adjust gauge shoes. (See ADJUSTING CUT HEIGHT—TURNBUCKLE TOP LINK OR HYDRAULIC TILT CONTROL in Operating the Mower-Conditioner section.)

Change cutterbar angle. (See ADJUSTING CUT HEIGHT—TURNBUCKLE TOP LINK OR HYDRAULIC TILT CONTROL in Operating the Mower-Conditioner section.)

Down or lodged crop.

Tilt cutterbar down. (See ADJUSTING CUT HEIGHT—TURNBUCKLE TOP LINK OR HYDRAULIC TILT CONTROL in Operating the Mower-Conditioner section.)

Install knives with bevel on top.

Raise carrier frame. (See ADJUSTING CARRIER FRAME HEIGHT in Operating the Mower-Conditioner section.)

Disk driver hub sheared. Disk not driven at full speed.

Replace disk driver. (See procedure in Service section.)

Crop accelerators damaged or worn.

Replace. (See REPLACING CROP ACCELERATORS in Service section.)

Lower crop shield damaged.

Repair or replace shield.

Raise cutterbar or adjust gauge shoes. (See ADJUSTING CUT HEIGHT—TURNBUCKLE TOP LINK OR HYDRAULIC TILT CONTROL in Operating the Mower-Conditioner section.)

Incorrect platform float spring adjustment. (Platform too heavy)

Adjust float springs (decrease weight). (See ADJUSTING PLATFORM FLOAT in Operating the Mower-Conditioner section.)

Incorrect knife mounting.

Check knife bolts and nuts. (See CHECKING KNIFE BOLTS and CHECKING KNIFE NUTS in Service section.)

Check knives. Make sure knives rotate freely on bolts. (See CHECKING KNIFE WEAR and INSTALLING KNIVES in Service section.)

Adjust. (See ADJUSTING WINDROW WIDTH in Operating the Mower-Conditioner section.)

Incorrect PTO speed.

Correct PTO speed.

Ground speed too slow.

Increase ground speed.

Crop accelerators damaged or worn.

Replace. (See REPLACING CROP ACCELERATORS in Service section.)

Heavy crop at centers of swath.

Install crop accelerators on the two center diverging disks.

Impeller Conditioner; Slow rotor speed.

Increase rotor speed. (See CHANGING ROTOR SPEED [IMPELLER CONDITIONER] in Operating the Mower-Conditioner section.)

Impeller Conditioner; Conditioning hood too far away from rotor.

Reposition conditioning hood. (See ADJUSTING CONDITIONING INTENSITY [IMPELLER CONDITIONER] in Operating the Mower-Conditioner section.)

Replace knives. (See REMOVING KNIVES and INSTALLING KNIVES in Service section.)

Mud and/or foreign objects on cutterbar.

Disengage tractor PTO and stop engine. When all moving parts are completely stopped, remove mud and/or foreign objects.

Incorrect platform float spring adjustment.

Adjust float springs. (See ADJUSTING PLATFORM FLOAT in Operating the Mower-Conditioner section.)

Strips of uncut material passing between disks.

Improper platform weight. (See ADJUSTING PLATFORM FLOAT in Operating the Mower-Conditioner section.)

Turn or replace knives before end is worn to halfway point. (See REMOVING KNIVES and INSTALLING KNIVES in Service section.)

Clean or replace wear plates between disks.

Check knife wear. (See CHECKING KNIFE WEAR in Service section.)

Disk driver hub sheared. Disk not driven at full speed.

Replace disk driver. (See procedure in Service section.)

Crop accelerators damaged or worn.

Replace. (See REPLACING CROP ACCELERATORS in Service section.)

Adjust belt tension (See ADJUSTING MAIN and CONDITIONER DRIVE BELT TENSION in Service section.)

Operate impeller in high speed. (See CHANGING ROTOR SPEED [IMPELLER CONDITIONER] in Operating the Mower-Conditioner section.)

Ground speed too slow.

Increase ground speed.

Draft link hitch; Adjust hitch height to level driveline.

Drawbar hitch; Reposition mower-conditioner hitch. (See ATTACHING MOWER-CONDITIONER DRAWBAR HITCH to Tractor in Attaching and Detaching section.)

Rephase cylinders. (See BLEEDING PLATFORM LIFT CIRCUIT in Service section.)

Adjust flow control on tractor outlet until tongue swings from one side to the other in 6 to 8 seconds.

Low hydraulic oil pressure and/or flow from tractor (older models).

Identify swing cylinder rod end hose-to-tractor. Remove orifice from quick-coupler end of hydraulic hose.

Check tractor operator's manual - use correct outlet. (See ATTACHING TO TRACTOR HYDRAULIC SYSTEM in Attaching and Detaching section.)

Excessive back pressure at tractor outlet.

Adjust flow control on tractor outlet to get 1 to 2 second drop-time.

Change orifice size in lift hose. See your John Deere dealer for optional size orifices.

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