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Recent content by exwestracer

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    The JLG 40F Boom Lift Dilemma

    I may actually be able to help with that. After going thru the whole dilemma with the dump valves (which were fine) we ended up with the same situation where boom up and rotate only worked in one direction. Turns out there was a bad ground (brown wire on ours) in the ground side control box...
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    The JLG 40F Boom Lift Dilemma

    Well, we are still about stumped on this. We've had the dump valve and pilot valve completely apart and found some bad o-rings and debris. Replaced the o-rings and cleaned everything out, but we still have no motion out of the Bertea stack. I'm wondering about the bypass line (no. 44 in the...
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    The JLG 40F Boom Lift Dilemma

    Thanks, OFF. Those manuals and LEGIBLE drawings were very helpful. We have it nailed down to the Bertea dump valve not closing. (I can see you all sitting there nodding your heads :) ) We have verified that the solenoid is working and the pilot valve is opening and closing. We have had the...
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    The JLG 40F Boom Lift Dilemma

    One other quick question: I'd read earlier in the thread about the possibility of the dump valve poppet spring being weak. On the Bertea valve, is there any spec for how hard the dump valve poppet should be to open manually (removed from valve body)? I can open it with light pressure with a...
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    The JLG 40F Boom Lift Dilemma

    Already screen shot that post and we are using it for testing! (At first I didn't realize it was for Bertea) Email sent. THANKS!
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    The JLG 40F Boom Lift Dilemma

    Oh, and if anyone has the voltage sweep values for PQ controllers, that would really help. I skipped many of the middle pages, so I'm sorry if I'm asking for a repost...:tong Merry Christmas
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    The JLG 40F Boom Lift Dilemma

    Thanks in advance.
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    The JLG 40F Boom Lift Dilemma

    Newbie with 40F problems Hello, and thanks in advance for all the great information. We have a 40F with a V4 Wisconsin, Bertea Prop stack, and PQ controls. If you are still emailing manuals and diagrams, I'd sure be grateful for a little early Christmas present. Our unit has problems...
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