Erde 102 Trailer maintenance

Nothing for nothing in this life.  You buy a trailer in 2004 and suddenly it needs new bearings. I'd noticed play on the LHS a while back, so decided it might be time to check the sealed bearings. It's a quick job once the nut covers are off (Erde part 2325 0003) one of mine is a new interesting shape, like Kryton's head. It took a massive amount of pummeling, then 24" stiltson (not sure that helped) and more pummeling to get it off. The other one will wait until the new bearings arrive.
Both are metal shielded. I'd have thought rubber sealed more appropriate for road use.
Inner VB C3 6202Z approx 14.85 x 35
Outer HJB 6004ZC3 approx 20x43

The LHS nut was at about 40 lb torque, RHS about 35. This site recommends 21 lb. 
https://www.westerntowing.co.uk/acatalog/How-to-Replace-Erde-Trailer-Bearings.html. Loosening and re-tightening to the same point showed about 30lb.

The LHS outer race is about as smooth as tarmac. Inner seems fine. RHS outer was a bit lumpy too.

It's back on for now and will need to be on light duty. The trailer has been <coughs> used at its limit a few times, so it's not surprising.

Update 27/8/17 
New bearings fitted. LHS is tight and spins slowly. RHS is fine. Tried swapping them left to right, but it was the same once they were torqued up, so left LHS just nipped
Getting the bearings out is challenging. I started hammering them out, but then realised that the hubs are alloy, so will crack quite easily. I then got some threaded bar and pressed them out. I didnt have a big enough socket, so a bit of square tube did the job.
















Erde fitted no name chinese C3 bearings 6202 Z / 6004 Z. The shaft machining seems to be medium tolerancing, needing c3 ie big wiggle fit. Oddly, c3 bearings are more expensive than normal fit. I've replacing with MTK normal bearings,  which are 1/2 the price. Ie €9 vs €23 for both sides. So that's why the wheel is not spinning well!

RHS

LHS


Old bearings. Top is RHS. Nice rust patches on both