I have an 873 that will not move forward or back. Machine starts fine, disengage parking brake, bar down and traction lock all seem to work fine ( The indicator lights on the BICS light up as they should and do not blink) I can hear the click of the solenoid when I depress either the green button or the parking brake, but it's been cold out lately. Could it be stuck? Any help would be greatly appreciated. Thanks