The 51 was decommissioned in the 70's and spent 25 years in a barn while the high-pressure cleaner was used mounted on a tractor.EngineThe engine had been rebuilt in the 60's by the military. All it needed was a freshen-up. I changed rings, bearings and exhaust valves. It runs smooth with excellent response and without smoke.Local rules prohibit changing to a different engine. Therefore it remains an F-headStrippingThe rear chassis was first sand-blasted, along with the rear axle and springs. The springs received smoothing, painting and grease before reassembly. The chassis and axle received epoxy and top paint.