Gday all,still haven't looked at or solved the hissing noise, but thought I would have a go at check and adjust relief pressures,have checked pilot pressure is good 50 bar, main pump at idle or full revs is only 25 bar not sure maybe something to do with hissing noise bypassing, relief valves are all over the place from 270 up to 390, not sure where to start adjusting,i think I have found the valve for main system relief pressure adjustment,if anyone could maybe explain a procedure of where to start adjustments would be great any help will be appreciated.cheers James
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