when I move excavator the tracks suddenly slows down and the pumps in that moment make strange sound, after I re-ignite command for move they work fine, and after few seconds they start to stop or stop-start-stop-start but with kicks. The pumps in that moment sound like they have a problem with sucking or pushing oil out (my impression) Well this problem is particularity noticeable in the morning when the machine is cold, after 1h of work when
everything is hot the problem is a little milder.
Could it be an electrical problem?
We have the similar problem with other excavator, the tracks slow down or almost stop. And the problem was some electrical relay located on DC excavator alternator!