System overheating. | Fan belt slipping or broken. | Replace belt or tensioner. |
| | Side screens plugged. | Clean screens. |
| | Low on oil. | Check for leak and correct. |
| | Oil cooler core plugged. | Clean oil cooler. |
| | Exceeding relief valve pressure. | Shift down one speed range. |
| | Plugged oil cooler bypass valve. | See your John Deere dealer. |
| | Excessive high pressure leakage. | See your John Deere dealer. |
| | Charge flush is inadequate. | See your John Deere dealer. |
| | Loop flush is inadequate. | See your John Deere dealer. |
Sprayer will not travel forward or reverse with multifunction control handle in forward or reverse.1 | Low on oil. | Check for leak and correct. Fill hydraulic reservoir with oil to center of sight tube. |
| | Plugged hydrostatic filter(s). | Change filter element(s). |
| | Hydro linkage improperly adjusted. | Adjust hydro linkage. |
| | Exceeding limiter pressure. | Shift to low speed. |
| | Broken drive shaft from engine to pump. | Repair as needed. |
| | Air leak in system. | Tighten connections. |
| | Drive system inoperative. | Check pump, motor and hydro cable or (see your John Deere dealer.) |
Ground travel speed erratic. | Radar picking up signals from tall crops. | Disconnect radar and use wheel speed sensor. |
| | Wheel speed sensor faulty. | Repair or replace. |
| | Low on oil. | Check for leaks and correct. Fill hydraulic reservoir to center of sight tube. |
| | Plugged hydrostatic filter. | Change filter element. |
| | Exceeding limiter pressure. | Shift down one speed range. |
| | Plugged shift orifice. | Could be something wrong inside motor so swashplate angle is not changing. |
| | Blown or leaking shift hoses. | Repair or replace. |
| | Drive system unable to maintain charge pressure. | See your John Deere dealer. |
Sprayer not responding to speed range switch.1 | Bad fuse. | Replace fuse. |
| | Low on hydrostatic oil. | Check for oil leaks and correct. Fill hydraulic reservoir to center of sight tube. |
| | Defective solenoids or switches. | Check and repair as needed. |
| | Plugged hydrostatic filter. | Change filter element. |
| | Air in system. | Tighten connections, hose clamps, and check for broken hydraulic lines. |
| | Drive system unable to build up charge pressure. | See your John Deere dealer. |
| | Faulty hydrostatic motor. | See your John Deere dealer. |
Lack of power or loss of power.1 | Low on hydrostatic oil. | Check for leaks and correct. Fill hydraulic reservoir to center of sight tube. |
| | Plugged hydrostatic oil filter. | Change filter element. |
| | Leaking or broken oil line or connection. | Check and repair as necessary. |
| | Drive system unable to maintain or build up pressure, or relief pressures incorrectly set. | See your John Deere dealer. |
| | Excessive high pressure leakage. | See your John Deere dealer. |
Wheel hubs/motors will not engage. | Hydrostatic system out of oil. | Check oil level for leaks and correct. Fill hydraulic reservoir to center of sight tube. |
| | Drive hubs disengaged. | Engage drive hubs. |
| | Hoses incorrectly connected. | Correctly connect hoses. (See your John Deere dealer.) |
| | Damaged or faulty wheel motors. | See your John Deere dealer. |
| | Damaged or faulty drive hubs. | See your John Deere dealer. |
| | Faulty wheel motor/hub coupling. | See your John Deere dealer. |