Diagnosing Hydraulic Functions

Baler won't feed; Hay plugged at feed opening.

Bale density is too high.

Turn adjustable relief valve knob counterclockwise to decrease density. (See ADJUSTING BALE DENSITY in Operating the Baler section.)

Adjust variable (soft) core (If equipped). If not equipped, install variable (soft) core option.

Check adjustable relief valve. Replace if defective. (See your John Deere dealer.)

Adjust variable core diameter (if equipped). (See procedure in Operating the Baler section.)

Gate opens while baling due to internal leakage in system component(s).

Repair or replace leaking component. (See your John Deere dealer.)

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Bale sticks in chamber.

New baler.

Reduce density until bales have worn paint off sidesheets. (See ADJUSTING BALE DENSITY in Operating the Baler section.)

Follow break-in instructions in Operating the Baler section.

Bale density too high.

Turn adjustable relief valve knob counterclockwise to decrease density. (See ADJUSTING BALE DENSITY in Operating the Baler section.)

Check relief valve. Replace if defective. (See your John Deere dealer.)

Damp crop or "gummy" buildup on side sheets.

Clean sidesheets.

Excessive sidesheet friction.

Check straightness and straighten front sidesheets of baler if needed. (See your John Deere dealer.)

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Bale density too low.

Faulty tension cylinder.

Repair cylinder if leaking. (See your John Deere dealer.)

Faulty relief valve.

Check relief valve. Replace if defective. (See your John Deere dealer.)

Damaged O-rings and/or backup rings on relief or check valves.

Replace. (See your John Deere dealer.)

Damaged seat or poppet in relief or check valves.

Replace. (See your John Deere dealer.)

Foreign material keeping check or relief valve poppet from seating.

Clean or replace. (See your John Deere dealer.)

Density control valve adjusted for light bales.

Adjust for heavier bale. (See ADJUSTING BALE DENSITY and CHECKING BALER PERFORMANCE IN THE FIELD in Operating the Baler section.)

Dirty hydraulic oil in tractor.

Change tractor filter and/or oil.

Bale density control knob hard to turn.

Raised gate and/or belt tension arm causes additional turning resistance.

Adjust with gate closed and belt tension arm down.

Dry thread on adjusting screw.

Apply a few drops of oil or a dry graphite lubricant to the threads.

Locking ring locked against valve body.

Unscrew locking ring before adjusting density control knob. (See ADJUSTING BALE DENSITY in Operating the Baler section.)

Bale density low on one side.

Bale forming procedure incorrect.

Review INTERPRETING BALE SHAPE INDICATORS in Operating the Baler section.

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Bale density gauge reading in red.

Tractor selector valve (SCV) not in neutral position while baling.

Move hydraulic lever to neutral while baling.

Defective density gauge.

Replace. (See your John Deere dealer.)

Adjustable relief valve set too high.

Adjust valve. (See ADJUSTING BALE DENSITY in Operating the Baler section.)

Defective adjustable relief valve.

Replace valve. (See your John Deere dealer.)

Gate opens while baling.

Tension gate cylinder extends when gate is closed and tractor selector control valve (SCV) is in neutral.

Air in hydraulic system. Open and close gate several times to remove air.

Faulty relief valve. (See your John Deere dealer.)

Tractor selector control valve (SCV) leaking.

Repair or replace. (See your John Deere dealer.)

Internal leak in baler hydraulic system.

Repair. (See your John Deere dealer.)

Gate will not close or lock.

Adjustable relief valve setting too low.

Turn adjustable relief valve knob clockwise to increase relief setting. (See ADJUSTING BALE DENSITY in Operating the Baler section.)

Obstruction between gate and frame.

Remove obstruction

Hydraulic flow of tractor too low.

Adjust tractor hydraulic flow. (See your tractor Operator's manual.)

Add orifice to bale tensioning valve. (See INSTALLING ORIFICE IN TRACTORS WITH LOW HYDRAULIC FLOW in Service-Baler section.)

Orifice at quick-disconnect (SCV) end of small diameter hose not installed correctly.

Reverse direction of orifice.

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Gate closes erratically

4-to-1 check valve interchanged with 12-to-1 check valve.

Install check valves in correct positions. (See your John Deere dealer.)

Orifice at quick-disconnect (SCV) end of small diameter hose not installed correctly.

Reverse direction of orifice.

Crop buildup on belts.

Remove buildup operate PTO while closing gate.

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