Remove the nuts that are on the bottom of the arm(s) fold the wiper arm out away from the windshield and wiggle it as you pry the assembly off the axle going through the front cap. Take it to a large truck, rv or NAPA parts store for replacement.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7