I think the "haul road" might be too narrow for Cooper's 785 & presently it's much too steep, if the drivetrain didn't explode 1st then it'd likely flip over backwards in a couple spots. With a heaping load, the B50's front end lifts the tires a bit as the tandem axles start to crest some hills.
"Bush fix" - sitting in a dark hole to make a fine wire repair on the quick coupler. The bucket cyl still weeps ever so little occasionally when it's working hard, wires get hard & brittle... is it possible to get 24? gauge petroleum resistant wire?