Komatsu D51 EX/PX-24 crawler dozer with electronically controlled hydrostatic transmission reduces fuel consumption by up to 13 percent

Komatsu introduced the new D51 EX/PX-24 crawler dozer at CONEXPO-CONAGG 2017. Among the most versatile of all the Komatsu dozers, it features an updated, Tier 4 Final engine, and an electronically controlled hydrostatic transmission.  These two features provide up to 13 percent less fuel consumption than the prior model, and exceptional maneuverability.

On the new PX model the high-capacity blade with wear-resistant moldboard can increase production by 15 percent compared to the previous model. The Standard Parallel Link Undercarriage System (PLUS) offers up to double the wear life and up to 40 percent less maintenance expense compared to standard undercarriage designs.

“The D51EX/PX-24 is a versatile machine, at home on jobsites from landscaping to site prep, as well as highway projects where you’re sculpting on and off ramps, for example,” said Jonathan Tolomeo, product manager, Komatsu America. “It can do the nimble jobs required of a small dozer, but also move serious dirt,” Tolomeo said.

Under the hood

• A 4.5L, 131 HP, EPA Tier 4 Final certified, SAA4D107E-7 engine with the same performance as the previous model. The engine features 13 percent higher fuel efficiency with the addition of the Selective Catalytic Reduction (SCR) system and Diesel Exhaust Fluid (DEF) tank.

• A new water-cooled, variable geometry turbocharger adds efficiency and excellent engine response.

• New Komatsu Diesel Oxidation Catalyst (KDOC) and Selective Catalytic Reduction (SCR) system reduce particulate matter and NOx, using 100 percent passive regeneration without a diesel particulate filter. There is no active or manual regeneration. Easy maintenance access to the DEF tank and pump.   

• New programmable auto-idle shutdown helps reduce unproductive idle time and saves fuel.

Machine performance features/benefits

• The economy (E) mode setting and electronically controlled, hydraulic hydrostatic technology work together with the improved engine efficiency to help reduce overall fuel consumption by up to thirteen percent.

• Two operator selectable transmission modes – quick-shift, three-speed mode, and a variable 20-speed mode – provide options to suit operator preference and application.

• Rear-mounted, high-capacity radiator with tilt-up, reversible fan module, is easy to maintain and gain access to cooler cores.

• New, triple labyrinth final drive housing design with debris shields provides additional protection to the final drive floating seals.

In-cab enhancements/features

• Komatsu’s super-slant nose, cab-forward design provides unrivaled visibility to the blade cutting edges.

• Large ROPS/FOPS ISO 3471 cab is pressurized and sealed to help reduce cab noise, vibration and dust.

• Updated 7-inch, high-resolution colour LCD display helps operators monitor machine performance, and provides real-time integrated diagnostics for troubleshooting without a laptop.

• KOMTRAX 5.0 telematics system monitors and provides key machine metrics, including KDOC status, DEF level, fuel level, operating hours, location, cautions and maintenance alerts.

• Operator ID system provides KOMTRAX data by job, application or operator.

• Standard rearview monitoring system integrated into the monitor provides increased rearward visibility with auto-sync reverse.

• Secondary engine shutdown switch and seatbelt alert.

• Individual operator settings allow up to 5 customizable machine setups to suit operator preferences.

• Heated air suspension seat with toolless adjustable arm rests provides luxurious operator comfort.