Equipped with an EPA Tier 4 Final certified engine, this dozer has the cab forward design improved blade response, faster work equipment speed, and an additional “fast-blade mode” that improves blade speed for high-speed grading. The D39-24 is extremely maneuverable by providing full power to both tracks during turns or counter rotation steering. It is an ideal choice for any grading or earth moving applications.
New regulations effective in 2014 require the reduction of NOx emissions. In addition to refining the U.S. EPA Tier 4 Interim technologies, Komatsu developed a new Selective Catalytic Reduction (SCR) device in-house.
Komatsu Diesel Oxidation Catalyst (KDOC)
Variable flow turbocharger
Komastu Closed Crankcase Ventilation (KCCV)
SCR with Diesel Exhaust Fluid (DEF)
Komatsu auto idle shutdown automatically shuts the engine down after idling for a set period of time to reduce unnecessary fuel consumption and exhaust emissions. The amount of time before the engine is shutdown can be easily programmed from 5 to 60 minutes.
The D39EX/PX-24 is equipped with Komatsu-designed HST that allows for Quick-Shift or variable speed selection. The HST consists of dual-path closed-circuits, with two variable displacement piston pumps and two variable displacement travel motors. Hydrostatic steering eliminates steering clutches and brakes, providing smooth, powerful turns. Fully electronic control provides complete automatic shifting and enables smooth control. Engine speed is controlled using an electronic fuel control dial.
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