Komatsu puts its technologies and know-how into the design and construction of the EX50 engine. With its four key, cutting edge technologies, the engine provides better fuel efficiency, maximum productivity, and lowered operating costs. The wet disc brake system offers increased durability in even the toughest work environments. The EX50’s excellent visibility, operator comfort and ease of operation are all designed to deliver greater operator productivity and efficiency.
The EX50’s large fuel tank reduces the need for frequent fill-ups and easy-to-see inspection windows show fuel and oil levels. A unique air cleaner automatically ejects airborne dust to reduce clogging of the filter element, thus improving suction efficiency and improving filter element life. A reserve tank for engine coolant keeps the system at a constant level and eliminates the need for frequent refills.
Operational visibility is greatly enhanced through improvements of the shape of the top of the counterweight and through an increased distance between the inner mast rails. Rearward visibility has been improved through a downward angle to the top edge of the counterweight. Also, forward visibility has been improved by repositioning the lift chains to the outside rail.
High pressure compressed fuel is stored in an accumulator chamber called a common rail. The fuel is injected into each cylinder at the proper time by an ECU (electronic controlled unit). This high pressure compression rail system optimizes fuel burn and greatly reduces fuel consumption.