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EX200-3 boom and arm not functioning

drillbit ยท 2018-08-15 01:14

Hi guys, my EX200 developed a problem. it seems to be only in the boom and arm functions. When theyve got no load on them and i pull on the lever, then they work perfectly. If for example though, i lift the boom off the ground and then try to pull back on the lever it goes really slow hardly moving at all. Also while its off the ground or under any load, the auto idle stops working. Ive checked the secondary pilot preasures and they seem fine. Swapped a couple of the load sencing shuttle valves around but it made no difference. Im wondering if it might be either the preasure sensor on the pump or the differential pressure sensor on top of the control valve. Another thing which might be worth noting is that i recently replaced the PVC, it fixed the origional problem i had but this new problem started after repling it all though not right away. It came on gradualy. has anyone had a similar problem? thanks

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