Do you remember the Cat® 1693 truck engine? Bob Keene does. When he started at Caterpillar in 1967, he joined the team working to replace that model with the 3406. In fact, Bob helped launch many of the Cat truck engines still on the road today. In this episode, he takes Kurt and Zach on a trip down memory lane — sharing insights into the many transitions in trucking (and truck engines) he witnessed over 40+ years at Caterpillar.

Cat Truck Engine Resource Center 

https://www.cat.com/en_US/articles/truck-engine-resource-center/haul-talk-podcast.html