hello all new here i changed the key switch the other day and when i start it up the bucket will only go up wont come back down i pulled the bypass to let it down at the same time i was trying to curl the bucket up it blow a hose going to the lift cyl and that free'd the engine I dont have a manuel yet I see 3 soleniods 2 on top of control valve and one on the bottom i switched the 2 on top and that didnt change a thing the one on the botttom is a little bigger Thanks
Was tou having the same problem with your old switch?
every thing worked fine had to use a screwdriver to start it when i got it so i bought a new one from tractor supply had the same studs on the switch installed and started it let set for a few days and the when i started it back up bucket up and curl down is the only thang that worked then i blew the hose and repalced. lifted cab and was checking the soleniods swaped the 2 coils on top of control valve the same thing the 2nd solenoid back is on all the time i unpluged that one and working fine. so far .its not showing the park brake set either or any codes on the screen i will order a manual
First of all Welcome to the forums Service Truck! If the F series is like the C series, turning the key all the way to the left past OFF is the auxiliary hydraulic pressure relief position to relieve your auxiliaries of any pressure when hooking up or unhooking the aux. hydraulic lines. From the symptoms you describe it sounds like the auxiliary hydraulics are stuck on like the earlier 40 series machines if the right hand control lever was in the right detent position, and you saying that the back solenoid is on all the time pretty much confirms this and means that either a wire was put on wrong at the switch or the switch itself is the wrong one. Hope this helps.
i've seen aftermarket switches cause some really stupid problems. :drinkup