Replying to my own post here, have just returned from Australia where I was able to take off the ARB end plates.
There were dried and broken flat end seals that sit in a 2mm recess (36mm ID 46.5mm OD).
I have temporarily fitted slightly stretched 3mm o-rings as replacements. There is a slight chamfer and they are supposed to be fitted with 1mm clearance so the compression is there but not overly so.
The 36mm outer shoulder of the end plate extends in for 8mm when it reduces to 32mm for the inner sleeve seal.
The bore of the housing is also 36mm causing an endplate metal shoulder alignment for 5-6mm into the housing.
36mm - 32mm leaves 2mm gap for the approx 17mm long cylindrical seal, I may try a row of 2mm o-rings as replacement here one day, but for now just fitted a 1.5mm o-ring under the outer end of the originals, to maybe exert a little outward and lateral pressure to expand it a little.
Oil seeping has stopped so far, no urgency to do any more on it just yet.
Even for a greased assembly this could also equate to less water ingress, those outer seals could be worth checking.
Ron
There were dried and broken flat end seals that sit in a 2mm recess (36mm ID 46.5mm OD).
I have temporarily fitted slightly stretched 3mm o-rings as replacements. There is a slight chamfer and they are supposed to be fitted with 1mm clearance so the compression is there but not overly so.
The 36mm outer shoulder of the end plate extends in for 8mm when it reduces to 32mm for the inner sleeve seal.
The bore of the housing is also 36mm causing an endplate metal shoulder alignment for 5-6mm into the housing.
36mm - 32mm leaves 2mm gap for the approx 17mm long cylindrical seal, I may try a row of 2mm o-rings as replacement here one day, but for now just fitted a 1.5mm o-ring under the outer end of the originals, to maybe exert a little outward and lateral pressure to expand it a little.
Oil seeping has stopped so far, no urgency to do any more on it just yet.
Even for a greased assembly this could also equate to less water ingress, those outer seals could be worth checking.
Ron