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Would that ring of bolts be the one visible between the vision ports and hatch pad on the interior shot? Looks like fairly simple access if that's the case. Bet that thing is on the heavy side though. Once again, you folks are great. Seems you can post a question on the oddest bits of MV...

Well, if I had been smart, I would have attached a picture earlier...doh! Here is what I am talking about when I say cupola. The lower part with the vision ports is, obviously, bolted to the roof. The upper part with the gun mount rotates 360 degrees. The gritty bearings are between the two...

I'll give them a try, thanks.

Thanks for trying Matt, I appreciate it. The M113 manual also talks about colour coded ball bearings, ratios of several of one to a few of the other. Does anyone have an M75 manual they can sell/lend/copy/read to me? :) Cheers.

Thanks Matt! Cheers.

Does anyone know how to service the bearings in an M75 APC cupola? Best I can tell that is what is on my armoured car, and it sounds like there is a half pound of sand in there with them. Closest info I can find is in the M113 tech manuals, but it isn't the same cupola, just similar. I...