This machine is a 2006 Raymond Electric Pallet Jack, model 830-F60L S/N 830-06-66475. The Arm does not move to the left or right? The motor is working and the drive wheel moves forward and backward. But when I pull the arm down it does not move to the left or right, maybe 1/4" max so my machine will go forward but goes straight and I can not turn it. I have ask this question before but to solution has not been found yet. I bought this unit as is, so I don't know what this problem could be. It really makes me thing that it is an electrical problem but I just don't know. The arm casing at the bottom looks sealed like nothing could get in it, but maybe something is hanging it up? Before I open this up, could it be electrical problem like a default or what else can it be? The Curtis controller on this machine shows 7 blinking lights and 2 red blinking lights and continues that way.