stick cylinder

[aongheas.macask]

I am having an issue with the stick cylinder on my excavator, a 12000# Hanix without pilot controls and with a gear pump. If the stick is extended so gravity helps when you pull it in, it moves pretty fast for half the stroke, then pauses for severaI seconds once the stick is vertical. If you "stick out" during this pause it immediately moves out. Would this be a pump issue or a cylinder issue? Seems like the cylinder should only be able to fall as fast as the pump lets it but I'm no hydraulics expert. The guy I bought it from said he recently had the cylinders packed but didnt specify which ones, not sure if this would be a piston dealing problem anyway?

This is common on most excavators, the stick is pulling the rod out of the cylinder by gravity, normally there will be an adjustable restrictor on the cylinder out line that can be adjusted to compensate for this and allow the piston to not run away from the oil. I'm not familiar with your brand of machine but a schematic will show if you have such a restrictor

 

[funwithfuel]

Please note the recent posts. The original concern is corrected, another member is now having issue with obtaining a replacement starter for a similar machine.