Posted by pete 23 on March 25, 2011 at 16:55:22 from (173.87.15.2):
In Reply to: Famall H Lift all posted by 660 guy on March 25, 2011 at 13:28:12:
First simple test. With engine shut off does the lever latch in raise position? If it does, start it up, pull to raise and see if lever stays there while lifting or attempting to lift. If it kicks the lever off you know the relief valve is leaking as it is designed with a trip button on relief valve and when fluid flows out relief valve it trips you back to neutral. If lever just stays and won't lift the pump gears them selves are leaking too much. May be worn out body or gears or both. Lots of times springs go through gears and raise heck with them. Now on the other hand, if your lever will not latch and stay, it takes an experienced feel to tell if relief valve is problem or not. You should put a gauge on it while trying to lift to see what it is capable of doing. About 700 psi would be a minimun you want. They need a 30 wt oil to operate unless they are in very good shape. Far as being repairable, have done hundreds but now days I doubt you could find affordable parts except for springs, gaskets, balls , relief valve seat etc.
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