Hitachi Ex60 slow and weak hydraulics

vendredi 4 juillet 2014

Hi all,

hoping somebody out there can help.

My Ex60-2 has developed the following problem, from start up and when cold the all functions work spot on slewing is fine smooth and fast, digging power is good, tracking is even and as powerful as normal, all modes and setting function fine, tracking speeds and digging power I, L, E, P etc. however after 15-20 mins the digging and slewing become slow and weak:(, if you select (P) mode it is marginally better, but hyd oil seems to be getting very hot:(, the tracking remains good, it is even and has same power as always:), (not sure if it psychological or not but could be slightly sharper) the digging and slewing drop right away though. if i leave it for about 2-3 hours it all comes back and functions well again:confused:, then just as before 15-20 mins all digging and slewing drop away, while tracking remains good. any idea please?




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