Hi guys i need some help with this problem the column display will not register rotor speed it sits on zero all the time (fan speed is displayed). Also you can not adjust the fan or rotor speed with the control switch switches i have changed the rotor speed sensor and checked the fuses and checked most of the accessible wiring harness for obvious faults would anyone be able to share an electrical schematic or service manual? Any Help would be most appreciated Regards Mark
I have a 2388 manual download. It's enormous and on my Dropbox. Not great at sharing that stuff. When it comes to the adjustment, climb in there and remove the 2040 roller chain that goes on the adjuster. My bet is you find that chain so stiff you have to cut it off. Make sure everything is free before you put the chain back on. The limit switches fatigue and fail, use your multimeter.
As far as your rotor speed issue. I would check to make sure the speed sensor connections aren't corroded or the harness isn't pinched/rubbed thru. If you have a multi meter handy you can verify if the speed sensor is working or not. If not check continuity from the speed sensor up to the cab.