I have a problem with a customers FB20KT, It has the finger tip controll.
Some times the hydraulic doesent work. The pump motor starts and it sounds like when you tilt ore lift to the max. But nothing happens, If I press the emergensy botton and release it the hydraulics works again.
When the problem occur non of the four functions work, so its not a problem with a ft lever and since the pump motor starts im thinking that the problem has to be in the Hydraulic manifold? Can it be a valve wich is fixed open so the oil runs back to the tank? Even when it runs good I think its a strange screaming noice from the system..
Have anyone had the same problem? I would like to hear your thoughts on this!
Thanks.
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Hi anyone know if this relay will stop all the finger tip controls working as all my controls have stopped but there is plenty of pump pressure my model is a 1990 fg15 serial number starting f25a the seat switch is bypassed best regards Greg
Thank you for letting me know, much appreciated. I had forgotten all about it since it was last December when I emailed you! thanks again.
Im just lifting this thread to tell you what the problem was.
In the fingertip armrest there are two big relays, one of these relays should be replaced with a new smaller kind of relay with part nr 9700502400. It comes with a connector that fits into the existing harness.
You can see wich of the relays you should change if you check the cables in the connectors ones you have the new part.
This solved the problem for me!
Thanks for your answer! But I dont think its the pump, the forklift have worked ok since I posted here. Still waiting on the problem to come again so I can do some testing. The noice doesent come from the pump, its sounds like it comes from the hydraulic manifold.
I would guess you need a new pump, I have replaced a few of these pumps in the past. I don't think the emergency button has anything to do with the fault because if the pump is making noise when you use the controls the chances are the problem is mechanical rather than electrical. Good luck.
Ok! I will check the pressure first and if I cant find the problem ill repost it there! Thanks!
tell you the truth
the one i had did not have fingertip controls
you may have an issue with load holding solenoids or something too
try reposting this in the "technical arena" since more people will see it
Thanks for the answer Ill check the pressure.
Do you have any idea about why it works again after pressing and releasing the emergensy button?
ive had one of these seize the pump
check the relief valve too
main relief pressure is 18142 kPa min you can have up to + 490kPa extra (2631psi +71 -0)
if youre reading very low pressure the pump has a problem or if its real high the relief valve might have malfunctioned
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