Built-in durability. Capable of 24-hour operation in some of the world’s most remote locations, the EX1900-6 incorporates a durable rigid box design and solid cast track frame. The oil coolers are positioned away from the engine radiator for optimal cooling efficiency, and to prevent damage from rocks, the excavator has high-mounted compact travel motors and an optional travel motor guard. Many components are convenient to access and replace. A walkway around the counterweight, for example, provides easy access to key areas for fast and safe inspection and maintenance.