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Shovels do not penetrate.
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Machine not level.
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Level machine. (See Operating Machine section.)
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Too much harrow down-pressure.
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Adjust. (See Operating Machine section.)
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S-tines loose on bar.
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Tighten S-tines.
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Shovels worn out.
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Replace.
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Depth control cylinders not functioning properly.
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Synchronize cylinders. (See UNDERSTANDING DEPTH CONTROL SYSTEM in Operating Machine section.)
Check for cylinder leakage. Use procedures in Service section. See your John Deere dealer.
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Stabilizer wheels set too low.
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Adjust. (See ADJUSTING STABILIZER WHEELS in Operating Machine section.)
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Hard ground or adverse operating conditions.
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Use double-pointed shovels or spikes. See your John Deere dealer.
Install TRU-WIDTH
™
sweeps. See your John Deere Dealer
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Make two passes at a shallower depth.
Adjust sweep pitch angle. (See Operating Machine section.)
(See RECOMMENDATIONS FOR WORKING HARD SOILS in this section.)
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Standards loosening on bar or not maintaining proper tool angle.
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Tighten U-bolts equally so same number of threads are exposed on both ends. (See CHECKING C-SHANK ASSEMBLY TIGHTNESS.)
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| Symptom |
Problem |
Solution |
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U-bolts (attaching standards) not tightened evenly or equally.
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Tighten U-bolts equally so same number of threads are exposed on both ends.
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Plugging.
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Plugging around wheels.
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Check standard spacing. See your John Deere dealer.
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Wrong tool equipment.
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Use correct tools for conditions. See your John Deere dealer.
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Standards mis-located.
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See your John Deere dealer.
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Machine bounces.
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Operating depth too great for soil conditions.
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Decrease depth. Make two passes, if necessary. (See ADJUSTING DEPTH CONTROL in Operating Machine section.)
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Operating machine too fast for soil conditions.
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Work at a maximum speed of 8-13 km/h (5-8 mph).
Reduce speed in rocky conditions.
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Standards mis-located.
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See your John Deere dealer.
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Depth control does not function properly.
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Transport lock-up valve closed.
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Open valve.
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Cylinders not synchronized.
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Synchronize cylinders. (See UNDERSTANDING DEPTH CONTROL SYSTEM in Operating Machine section.)
IMPORTANT: Be sure all air is bled from depth control system.
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Machine operating at different depths.
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Check depth control settings. (See SETTING SINGLE POINT DEPTH CONTROL or OPERATING TOUCHSET DEPTH CONTROL in Operating Machine section.)
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(See RECOMMENDATIONS FOR WORKING HARD SOILS in this section.)
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| Symptom |
Problem |
Solution |
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Cylinder leakage.
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Check for leakage. (See Service section.)
Repair or replace cylinders. See your John Deere dealer.
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Insufficient tractor hydraulic pressure.
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Check tractor hydraulic pressure. Use correct size cylinders for tractor pressure.
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Hydraulic hoses not connected properly.
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Reconnect properly.
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Wing-fold does not function properly.
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Wings raise too slowly.
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Adjust tractor metering valves. (See PREPARING HYDRAULIC SYSTEM in Preparing Tractor section.)
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Wings fold too fast.
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Install restrictor in cylinder or adjust tractor metering valves. (See PREPARING HYDRAULIC SYSTEM in Preparing Tractor section.)
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Cylinder leakage.
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Repair or replace cylinder. See your John Deere dealer.
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Insufficient tractor hydraulic pressure.
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Check tractor hydraulic pressure. Use correct size cylinders for tractor pressure.
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Machine does not run level, or machine does not tow straight when operating.
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Incorrect tire pressure.
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Inflate tires evenly. (See CHECKING TIRE PRESSURE.)
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Depth control cylinders leaking.
|
Check cylinders and check valves (if so equipped). Use procedure in SERVICE section. See your John Deere dealer.
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S-tines or standards not spaced correctly.
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Relocate S-tines or standards. See your John Deere dealer.
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Wing-fold linkage restricting wing movement on flexible machine.
|
Extend cylinder(s) fully. Adjust linkage to allow wings to flex during operation. (See ADJUSTING WING-FOLD OPERATION in Operating Machine section.)
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| Symptom |
Problem |
Solution |
|
|
Not level side-to-side.
|
Level machine. (See Operating Machine section.)
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Different size tires on machine.
|
Use same size tires.
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C-shanks wobble side-to-side.
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Split pivot bushings worn.
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Replace bushings. (See Service section.)
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Excessive tripping of standards.
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Decrease depth and/or speed.
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C-shanks bending.
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Spacers bound up under spring canisters.
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Free spacers.
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C-shanks come loose on frame.
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Not tightened square on frame.
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Be sure standards are fully seated on frame member and that U-bolt is tightened evenly. (See CHECKING C-SHANK ASSEMBLY TIGHTNESS.)
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