Drew Callahan 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
Drew Callahan · January 3, 2026
Air Brake System Maintenance for FLEETWOOD DISCOVERY A Fleetwood Discovery air dryer cartridge runs $180–$320 depending on which OEM supplier you call, plus another $400–$600 if a shop does the job. But that number isn’t really about the part—it’s about what happens when moisture and contamination eat through your brake system unchecked. I’ve watched owners … Read more
Drew Callahan · January 2, 2026
Air Brake System Maintenance for FOREST RIVER BERKSHIRE Most Berkshire owners run their air brake systems until something breaks, and by then the damage is already done. I’ve watched moisture-logged dryers tank compressors, seen slack adjusters wear past the point of adjustment, and pulled air lines so corroded they flaked apart in my hands — … Read more
Drew Callahan · January 2, 2026
Diesel Engine Oil Service for FOREST RIVER BERKSHIRE A single missed oil service interval on a Forest River Berkshire can cost you $18,000 to $35,000 in engine replacement — and that’s if you catch the damage before the block cracks. I’ve walked through enough engine bays across my 80,000 miles to know that diesel pushers … Read more
