^^ x2
I also run oil filled hubs and rubber caps (on front only, Maxidrive on rear) and haven't had a problem. Also carry a couple of spares but haven't needed to use them in the last 15 years.
I have replaced the plastic, after market caps on the 85 County with the Land Rover branded rubber ones after oil started leaking out of one of them and spraying all over the wheel. I also applied some Loctite 518 flange sealant just for good measure. I had used silicone previously but found that it can fail. My 2012 Defender now runs Maxidrive (HTE) rear axles and HTE drive flanges all-round. Caps are sealed with Loctite 577 thread sealant, which remains flexible. Wheel bearings are now oil-fed. Not cheap, but good insurance and very happy with that!
problem with rubber hub caps leaking or popping off.
if they spray oil on the wheel it could be theres too much oil in the hubs.
my hubs still have the seal in place seperating them from the CV spheres, and the CV s are sealed from the diff.
there is a bit of oil migration , but generally it all stays in the right places.
if you can drain them and refill them, 60 mls is what I'm running in mine down from 80 mls when I first converted.
cheers simmo
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