[77newell]

Tom: regarding not pressing the foot brake when the parking brake is on. In some brake configurations this would cause the spring brake (parking brake) and the service brakes to combine forces which could overstress the brake mechanisms. This was according to the manual I studied in preparation for the CDL for farm use recently.

With our more modern brakes this isn't a problem. I step on the brake every time I release the parking brake and nothing untoward has happened yet.