I had some play in the nearside lower bush Dave, so I intended to change to hard chrome pins, and that gave me the reason. It wasn't MOT fail play, but any excuse eh?
What's strange is that you would expect the lower grease nipple to have a channel into the lower bush. That's how the MGB and Midget is designed, and it can be tricky lining up the hole in the bush with the hole in the stub so the grease gets through. But this is designed so that the lower nipple comes through just above the bush. Now that's fine with an oiler, because the oil will run down into the bush. But with grease, the grease will sit on top of the bush and only the upward movement of the stub axle will wipe the grease into the bush. And excessive greasing will do nothing more than fill the cavity between the upper & lower bush with grease, but there are no wearing surfaces between the bushes. Therefore I may do a first shot of oil when it's back together, and I'll also be pre-greasing the bushes thoroughly. I've had the bushes sitting in an oil bath for the last six months by the way!!
In respect of the upper bush - the new kingpins have a tiny gallery which runs from the top bolt/grease nipple, which exits a narrow groove adjacent to the upper bush. This will easily get blocked, so again I'm wondering about using oil - but not Hypoy due to the additives which attack yellow metal. I'll post a picture showing this in the second phase.
The original stainless kingpin though, which had a top grease nipple, doesn't have a visible gallery and I'm wondering if its blind, and of no use.............
