It is suggested to fill the power cylinder with air tool oil and fill the hydraulic part with brake fluid...looking at the drawings it is not clear to me where these places are located. I'm guessing the power cylinder is filled at the little square plug about 3/4" of and inch from the bottom of the unit...where do you add the brake fluid? Do you just fill it from the master cylinder under the cab floor and force it thru the hydrovac or is there a place on the hydrovac to add brake fluid?
Simply put, yes. You won't need more than an ounce or two of fluid in actually lubricating the power cylinder.
The internal parts are lubricated as the brake fluid passes through the hydraulic cylinder. There aren't any other places to add fluid.
Jeff
