We have a Daewoo GC30s. The first stage will full travel to the top before the second stage begins to move upward just as it should, when there is no load on the forks. However, when lifting a load the second stage will begin to move upward almost immediately with first stage, then telescope upward to full travel. Our operators are complaining about having trouble controlling the down function of the forks when placing a load on our storage racks approx. 8-10 feet above floor level.