Drew Callahan · January 7, 2026
Air Brake System Maintenance for TIFFIN ZEPHYR You’ll get two completely different stories about Zephyr air brake maintenance depending on who you ask. Dealers will tell you that factory intervals are fine and that moisture in your lines is normal wear. The forums full of owners who’ve actually owned these rigs will tell you that’s … Read more
Drew Callahan · January 7, 2026
Diesel Engine Cooling System Service for TIFFIN ALLEGRO BUS Tiffin Allegro Bus owners living in the Southwest or running extended boondocking seasons hit a wall around 70,000–90,000 miles when the cooling system decides to leak. Not dramatically — just a slow, persistent weep from the lower radiator tank or a water pump that’s crying a … Read more
Drew Callahan · January 6, 2026
Air Brake System Maintenance for AMERICAN COACH AMERICAN EAGLE Your American Coach American Eagle’s owner manual and the dealer service department will both skip over something critical about air brake maintenance: the system you’re relying on to haul 40,000 pounds to a complete stop isn’t just a convenience—it’s engineered redundancy that demands respect, and a … Read more
Drew Callahan · January 6, 2026
Slide-Out Hydraulic Service for TIFFIN ZEPHYR I was parked at a campground near Moab when I first heard it—a grinding sound underneath the coach, rough and metallic, the kind that makes you turn off the music and pay attention. Turned out one of my slides was moving maybe two inches per cycle, and when I … Read more
Drew Callahan · January 5, 2026
Cooling System Service for AMERICAN COACH AMERICAN EAGLE Most RV owners think cooling system maintenance is something that happens automatically—like the oil just stays clean and the radiator just keeps working year after year without attention. That assumption costs people thousands when a Cummins diesel suddenly runs hot on a July afternoon somewhere between Flagstaff … Read more
Drew Callahan · January 5, 2026
Diesel Engine Oil Service for AMERICAN COACH AMERICAN EAGLE I had my American Coach parked in a dusty lot outside Moab last spring when the oil analysis came back flagged—not catastrophically, but enough to tell me I’d waited too long between changes. That’s when it hit me that most full-timers either nail the diesel service … Read more
Drew Callahan · January 4, 2026
Air Brake System Maintenance for NEWMAR KING AIRE Skip air brake maintenance on a King Aire and you’re gambling with the stopping power of a 40,000-pound diesel pusher you can’t afford to lose. I’ve watched guys ignore a slow compressor buildup or a cartridge that’s overdue for replacement, and every single one discovered the problem … Read more
Drew Callahan · January 4, 2026
Diesel Engine Oil Service for NEWMAR KING AIRE If I pull the dipstick on a King Aire that hasn’t seen an oil change in two years, what I find tells the whole story: oil the color of burnt coffee, thick enough to coat the stick like tar, and a smell that’s part diesel fuel, part … Read more
Drew Callahan · January 4, 2026
Slide-Out Hydraulic Service for NEWMAR KING AIRE “Drew, my King Aire slides are moving like they’re underwater. One’s getting stuck halfway out, and I’m losing fluid somewhere underneath. Is this something I can handle myself, or am I in over my head?” That’s the question I got from Mark at a rally in Arizona last … Read more
Drew Callahan · January 3, 2026
Diesel Engine Oil Service for FLEETWOOD DISCOVERY I’ve got my socket on the drain plug, and I can already feel the heat radiating off the oil pan—this Fleetwood Discovery’s diesel has been running hard, and the oil coming out is going to be thick and dark. I’m going to walk you through exactly what I’m … Read more
