Hi, great forum! My name is Geir and I am from Norway, my neighbour both a Hymac HM-690 couple of years ago. The last owner has changed the original engine for a Mercedes truck engine. When my neighbour got it home, he noticed that the track tension was weak (the track was to loose). He then got the track adjuster reconditioned, and the excavator runs just fine. But last summer it began to leak too much hydraulic oil. It also got (have been for a vile) weak on the rotator, and it newer stood still (rotated away when digging at the side of a ditch). This spring we decided to get something done. It turn out that the brake on the rotator was disconnected mechanically, we just mounted all parts back on, and now we hope it will work. The oil leak is on the rotator distributor, it turned out all the seals were worn-out. We ordered new seals yesterday (it have to be made, and the fabrication will take 2-4 days), and we can’t wait to get them mounted. The hydraulic motor for the rotator is pretty worn, but we decided to make the best out of it, then we just have to se. I’ll try post some pictures of the machine one day.
Hope you understand my English!
Regards
Geir