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|  M8 Greyhound Brake Fluid? 
			
			Hi, I'm working on dragging brakes on a Greyhound. We use DOT 3 in the brake system, based on a Google search saying "HB" fluid should be used. (The 1943 manual we have says "information not available at this time".) I just dismantled a wheel cylinder and found the u-cup seals in good condition but maybe a bit soft and swollen. They make the pistons quite hard to push by hand through the bore, so I was wondering if we should have been using a mineral oil. Malcolm | 
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