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Excessive noise and vibration
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Mower-conditioner incorrectly attached to tractor.
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Attach mower-conditioner correctly. (See Attaching and Detaching section.)
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Loose hardware.
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Check tightness of hardware.
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Loose hex shaft bearing supports.
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Check tightness of hex shaft bearing supports on left-hand side of tongue.
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Damaged hex shaft bearing/supports inside tongue.
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Remove plastic plugs from left-hand side of tongue and check. Replace if necessary (See your John Deere dealer.)
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Impeller tines missing.
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Replace missing tines.
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Damaged leaves and broken stems
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Excessive impeller rotor speed.
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Reduce rotor speed. (See Changing Impeller Rotor Speed in Operating the Mower-Conditioner section.)
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Conditioning hood too close to rotor.
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Reposition conditioning hood. (See Adjusting Conditioning Intensity in Operating the Mower-Conditioner section.)
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Cutterbar plugging
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Wet ground conditions causing plugging.
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Increase cutting height by reducing platform angle. (See Adjusting Cut Height in Operating the Mower-Conditioner section.)
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Adjust side gauge shoes. (See Adjusting Cut Height in Operating the Mower-Conditioner section.)
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Adjust float springs. (See Adjusting Platform Float in Operating the Mower-Conditioner section.)
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Impeller conditioner hood set too low
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Raise conditioner hood
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Bent or broken knives.
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Replace knives. (See Removing Knives and Installing Knives in Service section.)
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| Symptom |
Problem |
Solution |
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Ragged cut
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Incorrect platform float spring adjustment. (Header too light)
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Adjust float springs. (See Adjusting Platform Float in Operating the Mower-Conditioner section.)
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Incorrect cutterbar angle.
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Change cutterbar angle (tilt down). (See Adjusting Cut Height in Operating the Mower-Conditioner section.)
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Slow impeller rotor speed.
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Increase rotor speed. (See Changing Impeller Rotor Speed in Operating the Mower-Conditioner section.)
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Dull knives.
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Reverse or replace knives. (See Removing Knives and Installing Knives in Service section.)
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Knives incorrectly installed.
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Install knives correctly. (See Installing Knives in Service section.)
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Excessive ground speed.
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Reduce ground speed.
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Incorrect cutting height.
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Adjust side gauge shoes. (See Adjusting Cut Height in Operating the Mower-Conditioner section.)
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Change cutterbar angle. (See Adjusting Cut Height in Operating the Mower-Conditioner section.)
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Down or lodged crop.
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Tilt cutterbar down. (See Adjusting Cut Height in Operating the Mower-Conditioner section.)
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Raise carrier frame. (See Adjusting Carrier Frame Height in Operating the Mower-Conditioner section.)
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Disk driver hub sheared. Disk not driven at full speed.
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Replace disk driver. (See procedure in Service section.)
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Crop accelerators damaged or worn.
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Replace. (See Replacing Crop Accelerators in Service section.)
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Lower crop shield damaged.
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Repair or replace shield.
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| Symptom |
Problem |
Solution |
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Frequent breakage or bending of knives
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Cutterbar set too low.
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Raise cutterbar or adjust side gauge shoes. (See Adjusting Cut Height in Operating the Mower-Conditioner section.)
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Incorrect platform float spring adjustment. (Cutterbar too heavy)
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Adjust float springs (decrease weight). (See Adjusting Platform Float in Operating the Mower-Conditioner section.)
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Incorrect knife mounting.
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Check knife bolts and nuts. (See Checking Knife Bolts and Checking Knife Nuts in Service section.)
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Check knives. Make sure knives rotate freely on bolts. (See Checking Knife Wear and Installing Knives in Service section.)
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Poorly formed or bunchy windrows
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Swathboard and tuck shields not adjusted.
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Adjust. (See Adjusting Windrow Width in Operating the Mower-Conditioner section.)
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Incorrect PTO speed.
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Correct PTO speed.
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Ground speed too slow.
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Increase ground speed.
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Crop accelerators damaged or worn.
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Replace. (See Replacing Crop Accelerators in Service section.)
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Heavy crop at centers of swath.
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Install crop accelerators on the two center diverging disks.
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Slow impeller rotor speed.
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Increase rotor speed. (See Changing Impeller Rotor Speed in Operating the Mower-Conditioner section.)
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Conditioning hood too far away from rotor.
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Reposition conditioning hood. (See Adjusting Conditioning Intensity in Operating the Mower-Conditioner section.)
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| Symptom |
Problem |
Solution |
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Strips of uncut material left on field
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Broken or excessively worn knives.
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Replace knives. (See Removing Knives and Installing Knives in Service section.)
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Mud and/or foreign objects on cutterbar.
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Disengage tractor PTO and stop engine. When all moving parts are completely stopped, remove mud and/or foreign objects.
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Incorrect platform float spring adjustment.
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Adjust float springs. (See Adjusting Platform Float in Operating the Mower-Conditioner section.)
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Strips of uncut material passing between disks.
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Improper platform weight. (See Adjusting Platform Float in Operating the Mower-Conditioner section.)
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Turn or replace knives before end is worn to halfway point. (See Removing Knives and Installing Knives in Service section.)
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Clean or replace wear plates between disks.
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Check knife wear. (See Checking Knife Wear in Service section.)
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Disk driver hub sheared. Disk not driven at full speed.
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Replace disk driver. (See procedure in Service section.)
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Crop accelerators damaged or worn.
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Replace. (See Replacing Crop Accelerators in Service section.)
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V-Belt breakage
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Incorrect belt tension.
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Adjust belt tension. (See Adjusting Main and Conditioner Drive Belt Tensions in Service section.)
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Crop wrapping on impeller
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Impeller running too slow.
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Operate impeller in high speed. (See Changing Impeller Rotor Speed in Operating the Mower-Conditioner section.)
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Ground speed too slow.
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Increase ground speed.
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Machine vibration
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Tractor driveline not running level.
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Adjust hitch height to level driveline.
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| Symptom |
Problem |
Solution |
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Machine will not raise off left-hand side lock channel.
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Right-hand lift cylinder fully extended (not on lock channel) but left-hand side cylinder not moving.
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Rephase cylinders. (See Bleeding Platform Lift Circuit in Service section.)
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Tongue swing too slow
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Tractor outlet not on full flow.
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Adjust flow control on tractor outlet until tongue swings from one side to the other in 6 to 8 seconds.
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Low hydraulic oil pressure and/or flow from tractor (older models).
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Identify swing cylinder rod end hose-to-tractor. Remove orifice from quick-coupler end of hydraulic hose.
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Header drop-time too slow
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Incorrect tractor outlet for single-acting cylinder system.
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Check tractor operator's manual - use correct outlet. (See Attaching to Tractor Hydraulic System in Attaching and Detaching section.)
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Excessive back pressure at tractor outlet.
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Adjust flow control on tractor outlet to get 1 to 2 second drop-time.
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Change orifice size in lift hose. See your John Deere dealer for optional size orifices.
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