Hwdh70 & 90 Hydraulic maualuga maualuga maualalo pamu

HWDH70 & 90 O le Dirdraulic maualuga maualuga le pamu o le pamu e tele lava aoga i le gaioiga ma fausaga. E vaetamaina se tasi-piston faʻalua-gaioiga galue mo le faʻatulagaina o le hydraucutic drive e mautinoa ai le mautu ma lelei galuega. I le taimi lava lea, o le aotelega o le faʻatulagaina o meafaigaluega o loʻo fetaui lelei, e talafeagai mo le faʻapipiʻiina ma le faʻaaogaina i totonu o siosiomaga eseʻese siosiomaga. E faaauupegaina foi i le polo vato e faʻamautinoa ai le mautu ma faʻatuatuaina o meafaigaluega.