I read here the other day, and I can't find the reference now, that the steering knuckles should be greased by removeing the square plug on top of the wheel hub and squirting in 12 pumps of the grease gun. It was added though that if the Birfield spheres were dry then hajf a tube would be better. This is not very scientific in my book and I'm looking for a better guide-line. My spheres were covered in grease, but old dried grease, so I put 30 squirts in each wheel. Is there no guide like fill to top or to within 2" of top or some other indication of correct greasing?