My unit EX60URG got big problem here. Anyone can give some ideas uo solve it? My unit will overheat after 30min. The black smoke comes out at steep slope with no any movement. Actually this unit already checked & repaired. Replace all o/h kit for travel motor, main pump, swing motor, hyd control valve, boom, bucket, changed hyd oil, fuel filter, oil filter...... butproblems still remain. The power getting decrease after 30 min, rh travel motor very weak, even flat land still weak in power and black smoke start. I dont know whats wrong again. Please help me.....
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