Steering hydraulics LEXION II CLAAS ACADEMY Checking the Autopilot system Note: When checking the steering system stationary, it is advisable to support the rear of the machine slightly, thus removing the load. Problem: - When the Autopilot system is energized, the steering system does not react. Manual operation and working hydraulics are working correctly. Diagnostics: - Does the steering react, when the solenoid valves are operated manually, thus suggesting that the problem could be electric. Does the steering react, only when another service on the working hydraulics system is operated, this would suggest that the oil pressure switch could be at fault. Problem:
- The hydraulic system overheats when the Autopilot system is energised. Diagnostics: - Should the problem be sorted when the connector for the oil pressure switch is disconnected, then the fault could lie: - Accumulator defective - Oil pressure switch defective - Valve spools leaking - Delivery valve leaking - Pressure relief screw leaking Problem: - When the Autopilot system is switched off, the steering is heavy in one direction when operating the steering manually. Diagnostics: - The relative lock valve should be checked. Problem: - The machine always steers one way or the other. Diagnostics: - The relative lock valve should be checked, or the seal in the steering ram. 2-16 02/2001