I'm not sure if the Liebherr machines sold in the US are the same as what is sold here in the UK,the machines here have a couple of different work modes and a heavy lift,in the heavy lift mode the flow from the pump is reduced,the hydraulics slow up and the lifting capcity increases,as far as I remember there is a switch on the panel with a heavy weight symbol,when it is lit up heavy lift mode is engaged,if you have a handbook look up the different work modes,in the right digging mode when a lever is touched there is a rapid responce fom the engine tone,if you are not getting that response in digging mode it could be the main regulator valve has an issue,the pumps are fairly robust and though I have changed one or two due to other things causing the failure they are reliable.
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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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