CONTENTS / MAY 2022 p. 8 Shop Operations Ins & outs of maintenance outsourcing Fleet needs, provider capabilities, and data all drive the most effective service choices. Here's how some fleets are handling these decisions. p. 16 » ON THE COVER In The Bay Training surge Training and tools to help technicians keep up with electrical issues. p. 20 Equipment Go with the flow Optimizing replacement intervals and investing in new technologies are just a few filter maintenance strategies to help fleets reduce downtime. » Filter media SPECIAL TECHNOLOGY REPORT p. 28 The dawn of hydrogen trucks Commercial fuel cell electric vehicle deployments are picking up steam in the U.S. Here are the manufacturers at the head of the pack. SPOTL IGHT ON... p. 26 Body & Cab Air brake breakdown The integration of sensory technologies and other design improvements are giving technicians some assistance in the bay, but nothing can replace well-executed brake system PMs. p. 34 Safety Inventor puts end to wheel-off accidents Former NASCAR driver Billy Turner, inventor of the TetherTech Hub System, knew wheel-offs were far too common and sometimes deadly. So he decided to do something about it. DEPARTMENTS FROM THE EDITOR 6 Hitched Up Confessions of a fuel-cell fool 38 Fleet Parts & Components What's new in products for more efficient fleet operation. 40 Tools & Equipment A roundup of the latest tool and equipment offerings. Advances in vehicle filtration P. 20 41 Classifieds On the cover: Image composition: d1sk |1304538619, 1387134141 | Vladyslav Severyn | Getty Images; 113092918 | Newbi1, 155289115 | Stepanenko Oksana | Dreamstime Photo: Penske Tools for electrical diagnostics P. 16 V IEWS FROM THE EXPERTS 33 Management Tips to manage your mental checklist By Joel Levitt SPRINGFIELD RESOURCES 42 Guest Editorial The EV e-fluids revolution By Michael Gahagan THE LUBRIZOL CORPORATION Want to contribute? Contact us at editor@FleetMaintenance.com In-house vs. outsourced maintenance P. 8 May 2022 | FleetMaintenance.com 3http://www.FleetMaintenance.com