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    JLG 450A 3 Functions not working

    Sorry for my absence, my day job is working for the Government and I cannot access this forum from my Government PC. I have validated that my proportional valve is working, but I still don't have the functions mentioned. I went back through the safety switches, and verified that my two boom...
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    JLG 450A 3 Functions not working

    Thanks for the Bang Bang explanation. I completely understand what you are describing. It is a nice day, so I hooked up a pressure gage to the P2 port, (the functions I am having trouble with) Just to verify the pressure from the source. I have plenty of pressure to work with, although I...
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    JLG 450A 3 Functions not working

    Willie, That is where I am stuck, my steering works fine. If I am reading the schematic right, the steering works from the same pump source as the non working functions. I think we have a similar problem. I hope one of us figures this out soon. Tim
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    JLG 450A 3 Functions not working

    Thanks for the advice, Willlie59; I checked the relay and the coil for the Main Dump valve, and found it to be working properly. The relay is getting proper voltage, and further activating the Main Dump valve. I further verified by operating a working function that also activated the Main...
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    JLG 450A 3 Functions not working

    I have a 2000 model JLG 450A, Early serial number. Anyway, I bought the item recently at auction, and have fixed most of its problems. I still however have three functions that do not work. -Basket level up and down -Extension in or out -Basket pivot. Right or left. I can activate the...
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