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  1. K

    The JLG 40F Boom Lift Dilemma

    So is a holding valve the same as a counterbalance valve then? If so could I pull the return line back to the valve off and see if I get fluid from there? would that be an accurate way to diagnose if it is the counter balance valve? I am speculative of the manual descent falls. It is an older...
  2. K

    The JLG 40F Boom Lift Dilemma

    I have a 40 f. Recently it has started slowly bleeding down on the lift cylinder. The cylinder was rebuilt not long ago maybe 100 hours. Worked flawlessly until now.I can't figure out what exactly is the holding valve in the system? Can anybody help me? Any other suggestions as to where to look...
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