O Ring 1.180-00139 #72-5 is suitable for DooSan DX170W(DX170W(ERP)) excavator. DX170W(DX170W(ERP)) excavator hydraulic parts 1.180-00139 is on sale at Tonkee. Tonkee(www.partsdic.com) offers high quality 1.180-00139 replacement parts for your excavator.
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