I have a GCX20E forklift.
We just replaced seals on the center lift cylinder.
I think we may have re-installed the load lowering valve incorrectly.
Does anyone have a diagram of how this valve should be re-assembled.
After re-installing the cylinder, I now get mixing of the lift between the center cylinder and the outer cylinders - before, the center cylinder would fully extend first, then the outer cylinders would extend. Now all three cylinders tend to extend together. Also, the lowering speed of the center cylinder is much slower than before.
Any help is much appreciated!
Thanks,
Robert
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I just looked at the data plate. It is a GCX20E.
can you double check that model number?
my information only covers a GPX30/40/50E series
nothing like you said
but in that GPX information it does not break down the cylinder in any pictorial form, it just shows how to remove the cylinder and take the crosshead pieces off.
In the description it speaks of dissassembly and reassembly in detail and mentions the flow control valve which is in the base of the cylinder rod, it says to position it with the arrow pointing towards the piston.
I thought about the new seal simply being tight and needing to break in. I didn't do the reassembly of the cylinder, so I don't know how hard the ram was to re-install into the cylinder. The safety valve has three pieces and a housing.
- spring
- valve (long piece with a hollow nose at one end and drilled base at the other end)
- bushing (seat?)
- screw on housing
It looks like the valve nose should seat on the hole in the screw on housing - does this sound correct?
was the ram hard to reinstall?
if the packing on the ram was tight it may be causing a drag.
the freelift cylinder has to move freely till it gets to the end of its stroke, then the secondary lift cylinders pick up and start extending the outer channels after the carriage gets to the top.
As far as this 'load lowering valve' your speaking of there is not a 'lowering valve' in the cylinder, the only valve that would be in the cylinder is the 'safety valve'. This valve is there to keep the cylinder from dropping too quickly if a hose ruptured. Now if by chance you installed it backwards it may cause this problem. I have seen those cause several problems related to lifting and lowering both.
So you may want to pull the ram back out and make sure it is still intact and try turning it around.
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