I've overhauled way too many pedals in my past. Now, my approach is if the bearings seem fine, and the preload is good, then I just inject new grease through the handy grease injection port. Less than 5 minute operation.

All of the old grease gets pushed out inboard for cleanup with a rag. A lot faster and it reduces the risk of the locknut/cone getting loose, and playing havoc with the pedal internals. IIRC, on the right side, the cone will unwind and spill balls on the road. On the left, the cone will tighten up until the pedal locks up and the balls and cones are destroyed.