2 Steering hydraulics Testing the steering system 3253
Testing the steering system Description of function Checking the steering gear shaft
Steering gear shaft height play = 0.1 to 0.3 mm. Clearance from bottom inside rotary valve = 3 mm.
Return
When the steering wheel is actuated with the diesel engine shut off, the leaf springs in the rotary disc must bring the steering wheel back to its neutral position.
Reaction
If steering reaction is insufficient, internal leaks in the steering system must be checked. To do this, disconnect the lines from the steering cylinder and plug them tightly with plugs. With the oil at operating temperature and at max. no-load speed of the diesel engine, the steering wheel must not allow more than 4 turns in both directions when using a force of approx. 25 Nm. When the actual number of turns is more than 4, check the steering valve for leaks. When the actual number of turns is less than 4, check the steering cylinder and the optional autopilot valve for leaks.
Steering force
In case of insufficient power in the steering, check tyre size, tyre pressure and machine ballast, condition of the connecting rod and smooth action of stub axles. A pressure test at the steering hydraulics measuring port must show the value 150+15 bar.
Setting of pressure relief valve
Adjusting the pressure relief valve on the machine in built-in condition is not possible.
Venting the steering system
Any installation work on the steering hydraulics must be followed by venting the system on both hydraulic lines of the steering cylinder with the diesel engine running.
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000 293 892 1 - SYS-H JAGUAR 493 - 03/06
