I have a yale picker. It recently stopped moving in any direction. The hydraulics work with no issues. Had a yale technician come and look at it, and he said it was the danaher motion conroller. Replace it with a rebuilt one and has the same issues.When turning the key on steering motor normally turbs on. Now i get no power to the steering motor. The power comes directly from the danajer controller. As soon as i turn key on i get error on motion controller. I have no idea what this means. Has anyone else had anything like this happen?
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Finally got this machine to work. It turned out to be one of the brushes in the steering motor was stuck. Both myself and the yale tech only pulled the front brush, and it showed normal wear. The back brush which is harder to get to must have been stuck and not making very good contact. Reseated the brush and machine is working normal now.
Think i might have found the issue. I am only getting 12 volts at key switch when turned on. I traced wiring back to a small (looks like a resistor) mounted between main contactors. I have 24 volts on one side and am only getting 12 volts on the other. I assume the truck should be 24 volt throughout the system. Now the fun part , trying to locate the part.
Dennis,
Take both wires going to the key switch and connect on the same screw and see if the lift will operate. Make sure to push the disconnect switch first so that you have no power going anywhere. Once wires are connected on same screw, pull out the disconnect. If lift operates replace swtch. Where are you getting 8 volts? Make sure all connects at the disconnect switch are good and tight. Serial number would help. Good luck.
still trying to figure this machine out. At the key switch i have 24 volts. On the run side i am only showing around 8 volts with switch on. When i turn the key to the start position it still only shows around 8 volts. Would this be a key switch issue? Or is this something to do with the main voltage contactor. I get 24 volts at the contactor and then with the switch on i have 24 volts across the contactor? any ideas??
Dennis,
I would think the rectifiers would affect the operation all the time. Need to check the handle potentiometer. Turn lift on and move handle just enough to start moving in either direction. If it continues to move, push handle to full travel. Does the lift stop or continue to run? If it stops suspect the pot has a problem. May have wiring issues at the pot or even at the ignition switch and possibly estop. Good Luck.
I had a yale tech come out and the controller was what he thought was the problem. Battery voltage is good. Put original controller back in and randomly can get unit to move in both directions. Is there a possibility the issue could be caused by the rectifiers located on the drive contactor?. It will move in both directions and it seems like going forward is when it abruptly comes to a halt. When i turn key on and i hear steering motor running it will move.
Dennis,
You will need a qualified tech to troubleshoot. You may have received a bad controller. First, check battery voltage and fluid. When checking fluid level, only fill the battery cells so the inner cell is covered, never to the top of the fill hole. When it is filled to high, fluid will come out of the battery when charging. If your system is 24 volt, battery should read between 27.5 to 28.5. If the battery is reading 24 volts, it is discharged and will require charging. Good Luck
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