I have a 1997 sumitomo 145 excavator that suddenly has a hydraulic/fuel issue. It runs full rpm and as soon as you put a load to it will bog down and sometimes eventually stall/die. All functions make it stall under load (tracks, boom , thumb, etc).
Right away I thought it was a fuel issue but now I'm not so certain. Initially I replaced the primary fuel filter, replaced the water separator, rebuilt the feed /fuel pump , cleaned filter in banjo bolt, aired out fuel lines.
I'm trying to find the next troubleshooting step. Could it be a stuck hydraulic valve or solinoids on the relief? Is my next step pressure testing under load? Thanks.
Right away I thought it was a fuel issue but now I'm not so certain. Initially I replaced the primary fuel filter, replaced the water separator, rebuilt the feed /fuel pump , cleaned filter in banjo bolt, aired out fuel lines.
I'm trying to find the next troubleshooting step. Could it be a stuck hydraulic valve or solinoids on the relief? Is my next step pressure testing under load? Thanks.
Sumitomo 145 stalling issue
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