Okay, so since my last trip with my truck/trailer combination ended in brake failure (no injuries or damage thankfully) I'm a bit concerned about the Ford Chassis RV units. Ford seems to be obliv...
Regular maintenance and visual inspection is the key to minimal problems. I ALWAYS clean and grease the guide pins when changing brake pads and I replace the guide pin boots if necessary too. Works wonders for keeping the calipers freed up. Pads last longer too.
Unfortunately you can't see inside the brake lines but you can see bulging/cracked hoses and dirty brake fluid. IMO, most people ignore it until there's a problem. Ever price an ABS unit?