Adjust stalklifters.

Stalklifters bent or binding.

Inspect parts for damage and lubricate hinges.

Bent grid bars.

Replace grid bars.

Adjust, repair, or replace pressure plates.

Solution system not adjusted, operated, or cleaned properly.

Clean and adjust solution system.

Spindles not doffing.

Check and adjust doffers and picker bars. Check moistener system.

Moistener system malfunction.

Check for correct amount of solution being dispersed for operating conditions.

Dull spindles.

Replace spindles.

Knotty cotton.

Adjust pressure plates.

Row units running too slow.

Check for any derate condition. Perform unit speed calibration.

Unit input clutch slipping.

Adjust unit input clutch torque. Replace worn input clutch jaws.

Spindles not rotating.

Check snap ring on spindle drive shaft. Replace as necessary.

Replace spindle drive gear roll pin. (See your John Deere dealer.)

Pick in first gear.

Pressure plates too loose or bent and hinges worn.

Adjust, repair, or replace pressure plate.

Plugging in air ducts, discharge pipes, and suction doors. Doors may be too wet.

Clean and check for leaks. Check solution system for proper adjustment and leaks. Adjust air system.

Grid bars bent, missing, or out of adjustment.

Replace or adjust bars.

Door does not align with unit door supports.

Adjust doors for proper alignment.

Stalklifters too high.

Lower stalklifters.

Spindles not doffing.

Check and adjust doffers, picker bars, and moistener system.

Moistener system malfunction.

Check moistener column adjustments, solution ratio, and pressure setting.

Dull spindles.

Replace spindles.

Lower stalklifters.

Dull spindles.

Replace spindles.

Units running too high or too level.

Adjust unit height and tilt.

Plant guides adjusted too high.

Adjust plant guides.

Header height control system not set properly.

Adjust header height control.

Loosen pressure plates.

Idler drum clutch slipping.

Check idler clutch and replace worn parts.

Picking speed too high.

Decrease picking speed.

Row unit clutch slipping.

Check for worn jaws and proper torque. Check for correct number of shims.

Missing grid bars.

Replace bars.

Gap between stalklifter extension and front of unit.

Reposition stalklifter extension.

Clean doors.

Bent or missing grid bars.

Replace bars.

Row units too low or too level.

Adjust height or tilt row unit.

Clean doors.

Doors not aligned with ducts.

Align doors with ducts.

Wet suction doors.

Clean and service solution system. Increase spindle cleaner ratio and decrease pressure setting.

Jet post plugged.

Remove lint or dirt from jet post.

Air leakage.

Find air leak and repair.

Fan air pressure low.

Inspect condition and tension of fan belts. Operate engine at rated rpm.

Fan rotor vanes plugged.

Clean fan rotor vanes.

Adjust doffer height.

Doffer pads missing or badly worn.

Replace doffer assemblies.

Doffer assemblies not ground to specification.

See your John Deere dealer.

Solution system not adjusted, cleaned, or operated properly.

Clean and adjust solution system. Operate flush system.

Moistener system malfunction.

Check for correct amount of solution being dispersed for operating conditions. Check solution ratio.

Worn bushing in spindle nut.

Replace bushing. Be sure that moistener pad fins are perpendicular to spindle.

Spindles not operating at same level under doffer.

Shim picker bars. (See your John Deere dealer.)

Loose or worn picker bar stud.

Replace stud.

Moistener column not adjusted.

Adjust column. Moistener pad must wipe spindle surface.

Doffers tilt incorrect.

Adjust doffers tilt with radius and leaf gauges.

Clean and adjust complete moistener system. (See REACTING TO SPINDLE BUILDUP in Moistener System section.)

Cotton not defoliated.

Defoliate properly.

Using an additive or a wetting agent instead of spindle cleaner.

Use John Deere wetting agent, or spindle cleaner at proper ratio. (Use John Deere Spindle Cleaner in tough conditions.)

Not using flush system correctly.

Operate flush system. (See USING MOISTENER FLUSH SYSTEM in Moistener System section.)

Moistener column not adjusted.

Adjust column. (See ADJUSTING MOISTENER COLUMN POSITION in Moistener System section.)

Replace or repair. (See your John Deere dealer.)

Dry picker bars (high pitched squealing sound).

Lubricate picker bars.

Doffer column bent.

Replace column.

Worn out spindle bushing.

Replace bushing.

Spindles or spindle nuts striking grid bars (tapping sound).

Replace or adjust grid bars.

Doffer bearing worn.

Replace bearing.

Loose picker bar stud.

Tighten stud.

Doffer adjusted too low.

Adjust doffer.

Spindles hitting pressure plates.

Adjust pressure plates.

Doffer idler gear installed at angle.

Be sure that idler gear spacer sits inside hole in row unit sheet metal.

Replace clutch jaws.

Cotton buildup in moistener column.

Clean moistener column.

Bent picker bars.

Replace or straighten picker bars.

Drum jammed at bottom frame.

Remove obstruction.

Doffers too low.

Raise doffers. (See ADJUSTING DOFFER COLUMN HEIGHT in Row Units section).

Replace or straighten picker bars.

Stiff grease.

Run in row units. Use John Deere spindle lube or equivalent.

Wrapped spindles.

Clean spindles. Adjust Moistener System.

Worn clutch jaws.

Replace jaws.

Clutch springs not adjusted properly.

Adjust shim pack.

Spindle or picker bar bearings or bushings seized.

Replace bearings or bushings. (See your John Deere dealer.)

Doffers too low.

Raise doffers. (See ADJUSTING DOFFER COLUMN HEIGHT in Row Units section.)

Check moistener system for proper operation. (See Moistener System section.)

Doffers set too tight.

(See CHECK DOFFER COLUMN ADJUSTMENTS in Row Unit section.)

Bent doffer shaft.

Replace shaft. (See your John Deere dealer.)

Worn spindle bushings.

Replace bushings.

Doffers too high or too low.

Adjust doffers to proper height.

Adjust moistener column height, rotation, and position.

Worn spindle bushing.

If spindle wobbles, replace bushing.

Dirty moistener column.

Clean columns.

Doffers out of adjustment.

Adjust doffers column height and tilt to eliminate "wrapped" spindles.

Replace or tighten.

Moistener system plugged.

Clean and adjust system.

Broken hose.

Replace hose.

Air lock or empty solution tank.

Use drain plug on pump to prime system. (See PRIMING SOLUTION PUMP in Moistener System section.)

When operating in temperatures below -12 °C (10 °F), run-in picker 10—15 minutes to warm up oil.

Low on oil.

Check for leak and correct. Fill sump with oil.

Plugged oil filter.

Replace filter.

Pressure regulator valve failure.

See your John Deere dealer.

Clean all debris or obstructions from unit.

Unit drive system requires calibration.

Calibrate unit drive system using calibration wizard screen on ADU. (See DIAGNOSTICS AND CALIBRATION SCREENS in CommandCenter™ Display Screens section.)

Remove speed sensor from unit drive gear case. Clean tip of sensor if metal filings are present.

Speed sensor faulty.

If cleaning speed sensor did not correct problem, replace sensor and recalibrate using calibration wizard screen on ADU. (See DIAGNOSTICS AND CALIBRATION SCREENS in CommandCenter™ Display Screens section.)

Check routing of air hose. Reroute as necessary to avoid making any sharp bends. It may be necessary to trim 6—8 in. of length from air hose to make it route properly.

Sharp bend in 6 in. flexible air hose.

Check routing of air hose. Reroute as necessary to avoid making any sharp bends. It may be necessary to trim 6—8 in. of length from air hose to make it route properly.

Unit drive motor hydraulic hose on top of 3 in. flexible air hose on row unit 3 or 4 causing a restriction.

Reroute hydraulic hose so that it is not on top of 3 in. flexible air hose.

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