Ok, I misunderstood what you were talking about the first time when you were asking about changing the hoses. I assumed you were just talking about changing the pilot controls, but changing the actual lines going to the cylinders might not cause any actual problems but it could cause problems syncronizing the motions of the boom. That said, I don't know exactly how the smaller excavators like you've got are designed, but the boom cylinder circuit on most all of the larger excavators is different than the circuits going to the other functions. I say different in that they typically merge pump flows when lifting the boom, use regeretive oil from other circuits, etc all in order to increase the flow to the cylinders causing the boom to cycle faster. On your machine none of those things may be at issue here, but it would still pay to call and talk to someone in service at your local dealer and find out for sure. If you can't get anyone to help you feel free to get back with me with model and serial number, and I'll be glad to call and talk to one of the service guys I know at my local dealer. My email is open.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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