valmet 911 harvester

[june]

hey guys we have a probleme with the swing ( clockwise) of the harvester. its swing really slow! we are preatty shure it is not the joy stick beacuse the cab tilt to the right fine. witch is the same function .what is bizz it that its always 24 volt like it should wen the joysticks  i on swinging position. does any one had any  ideas before wi start stripping wiressssss !
thanks guys

[barbender]

How have you narrowed it down to an electrical issue, versus hydraulic or mechanical?

[june]

well for the hydrolic diagnostic i reverse the two wires on the block valve . wen i put the left joystick on right position it turned left so i know the hydrolic works and the rotor motor .
as for mecanical issue i just did a visual inspection
the main thing is that we have 24 volt on the plug that goes in the valve . we should have 24 volt only wen weclutch in a function ( turn right) ...

[Oliver05262]

The 

.what is bizz it that its always 24 volt like it should wen the joystick

Many of the European built John Deere machines that I worked on at the dealership used an electrical design that controlled the ground side of the system...maybe that's a Bosch design? Power was always at the function being controlled, and the ground was either on/off or variable (pulse width or in perhaps in some older designs, a variable resistance).