 Their guy, Eric, is a factory-trained technician that will use the latest technology, including computer diagnosis, to get your truck running again. Need parts? The Grease Squad will get that, too. Conway Beam is the area's part and service company for Mack, Volvo, and Cummings engines, but they service other truck models, too. Roadside service from the Grease Squad at Conway Beam behind the Salmon Run Mall. AM 1240. WATN.