| Symptom | Problem | Solution |
All four tread adjusts do not function. | Speed range not in first. | Shift to first speed range. |
| | Fuse blown. | Replace fuse. |
| | Faulty switch. | Replace switch. |
| | Load sense jamming valve not working. | See your John Deere dealer. |
| | Engine RPM’s set too low. | Increase RPM’s to 2400. |
| | Low or no hydraulic oil. | Fill hydraulic reservoir to correct level. |
| | Lack of or restricted load sense signal due to plugged suction strainer in hydraulic reservoir. | Inspect and clean strainer. |
| | Faulty tread adjust valve. | See your John Deere dealer. |
| | Faulty hydraulic pump. | (See Troubleshooting Of Hydraulic Systems in this section or see your John Deere dealer.) |
One individual tread adjust does not function, but others do. | Damaged or corroded electrical connection. | Repair, replace or clean electrical connection. |
| | Damaged electrical harness. | Repair harness. |
| | Faulty solenoid valve. | Switch coil with good coil, if function operates, replace coil. |
| | Tread adjust shim pads gap adjustment incorrectly set. | Adjust tread adjust shim pads gap correctly. (See Chassis section.) |
| | Knee stuck. | Lubricate with graphite spray. |
| | Check valve stuck shut in load sense line. | Clean, repair or replace check valve. |
| | Broken, damaged or worn shim pads. | See your John Deere dealer. |
| | Plugged orifice in hydraulic line. | Replace orifice. |
| | Faulty tread adjust diode. | Replace diode. |
| | Faulty tread adjust valve. | See your John Deere dealer. |
| | Faulty tread adjust cylinder. | See your John Deere dealer. |