Steering hydraulics LEXION II CLAAS ACADEMY Checking the steering system Steering spindle - height tolerance = 0.1 to 0.3 mm Distance to floor in rotor rings = 3 mm Return - The springs should return the spools back to the neutral position when the engine is no longer running and after the steering wheel has been operated. Reaction - In case of poor reaction, internal leaks should be inspected. Disconnect both hydraulic hoses from the steering rams, and securely plug them with screw plugs. With the oil at operating temperature and the engine at idle speed, it should be possible to turn the steering wheel at 4 min -1 with a force of 25 Nm into both directions.
If the wheel can be turned faster than 4 min -1 then check for leaks within the steering valve block. Should it be slower than 4 min -1 , then check for leaks at the steering ram. Power - Should there be not enough power in the steering, then the following items need to be checked out: tyre sizes, tyre pressure, condition of the connecting rods and the king pin. A pressure reading at the test port on the steering ram should be in the region of 160 +15 bar. The pressure relief valve is not adjustable on a complete machine. Caution: After every operation on the system, both hydraulic pipes from the steering rams must be bled, when the engine is at idle. 2-12 02/2001