Some time ago, I'd noticed that one of the axle boxes seemed to be retaining its oil level much better than the other three.
I checked whether there was any water under the oil in the offending box using an oversized horse-syringe (for want of a better name).
|One of these|
On removing the covers from the two right hand side axle boxes, the oil retaining one showed signs that its gasket was split at the top. On further inspection, both the right hand side gaskets were in poor condition and weren't helped by being disturbed.
New gaskets were made for both of them. (As no problem has been apparent with the LHS boxes, they have been left alone).
|Front RHS gasket of 1.5mm Rubberised Cork|
|Assembled (complete with missing stud!)|
Note: These photos have been cropped. If there are any modellers wishing to copy the axle box detail, leave me a comment below. I have other photos with more detail that I can supply on request.