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Posted by PAULIH300 on May 08, 2005 at 12:06:38 from (205.188.117.138):
OK,here's the situation: My 300U has a loader(U34) with single acting lift cylinders and dual acting bucket cylinder.The fluid level is up to the full mark.The bucket cylinder works fine in both directions (it uses quick disconnects too),while the lift cylinder gets so far and starts sucking air.If you let off the lever and keep trying it again it will eventually go to the end of their travel,but it takes a while.The Fast Hitch works fine but will not lift the rear off the ground.There is no wild noises,no relief valve noises,just doesnt seem to want to go beyond taking the squat out of the tires.The fluid is aerated...nost likely thanks to the lift cylinders taking so much fluid and sucking air.There are no external leaks anymore,and water isnt getting inside.Could this all be caused by a dirty pickup screen? From what I see inside the reservoir its clean as a whistle in there...but of course you cant see the screen from the fill hole.There has been manifold pipe welding done where the block bolts to the reservoir,but I see no leaks where air could be getting in there.I blame 90% of these problems on the Single Acting lift cylinders.When they go down,whats to take ALL the fluid out of the hoses completely,so when you lift again the hoses are now empty and you've trapped a pocket of air? Would QDs on the lift hoses break up any air?
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