samedi 26 septembre 2020

Hitachi EX swing issue

Hitachi EX120-2 Excavator
1995 4,500hrs.

I'm having issues with the swing motor. At first it would act lazy after 2-3 hrs. of use and now it barely swings after 10 mins from cold to warm. Meaning it moves left or right but at about a foot per 5 seconds with the bucket and arm curled in. Forget having a load in the bucket or boom extended out. I pulled the swing motor- full disassembly and reseal after no issue found.
At first thought I thought it was hydraulic oil getting hot and dumping...

Hitachi EX swing issue

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