Hello, i think the pump is not the problem, i was doing some testing and the pressures are different on each function of the main control valve. Lift is now about 300 bar when i changed line relieve valve from another section. Bucket curl is low around 240 bar and jumping up and down like crazy...
Hello, today i did some research in service manual and i starting to think that maybe the problem is in the pump control piston. When i striped down the pump i dint find any problem with the piston rotating group, but i found that the control piston for swash plate had some scoring on its...
Hello, thank you for your answer. I think the pressure is escaping somewhere, but cant figure out where. The pump is supposed to destoke 10 % when stall is detected, which seems to be working. When i look at the diagnostic data i can see current drop from 1.8 A which is maximum displacement to...
Hello, i am dealing with strange problem on CAT 988K loader. Hydraulic pressure is low, but only on high idle. Specification is 330 bar, a can meet that on low idle, but when on high idle pressure drops to like 240 bar. We inspected the pump, seems fine. Checked main relieve valve, also seem...
