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Quick Specs

Net Horsepower

131 HP / 98 kW @ 2200 rpm

D51EXi-24

Operating Weight: 30,821 lb
Blade Capacity: 3.5 yd³

D51PXi-24

Operating Weight: 31,438 lb
Blade Capacity: 4.4 yd³

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Top Features

Unrivaled Visibility

  • Super-slant nose, cab forward design locates the operator closer to the middle of the machine for unrivaled visibility to the blade cutting edges.
  • Large quiet integrated ROPS/FOPS certified CAB design is sealed to reduce noise, vibration and dust entering the CAB.
  • Standard rearview monitoring system improves operator awareness and helps reduce  operator fatigue. The camera can be synchronized with reverse operation for increased operator rearward visibility.  
  • An air suspension, heated seat, with adjustable lumbar support, tilt, and tool less arm rest adjustments allow the operator to work comfortably all day.
  • Easy accessible, ergonomically friendly controls provide precise blade steering and transmission control. 

 

Fuel Efficient Tier 4 Final Power

  • A 4.5L 131HP, EPA Tier 4 Final certified, SAA4D107E-3 engine provides up to 13% improved fuel efficiency, and improved throttle response with the new water-cooled Variable Geometry Turbocharger (VGT), water-cooled Exhaust Gas Recirculation (EGR) valve, and an advanced electronic control system.
  • An integrated muffler, flow through Komatsu Diesel Oxidation Catalyst (KDOC) and the Selective Catalytic Reduction (SCR) system with Diesel Exhaust Fluid (DEF), reduce particulate matter and NOx using 100% passive regeneration without interrupting machine operation. The KDOC does not require any scheduled replacement and has a service life similar to a conventional muffler.
  • The DEF tank has a sight gauge and is in an easy to access lockable compartment. The large capacity tank is designed to operate for up to two full tanks of fuel before refilling. The DEF pump and filter are separated from the tank for improved maintenance access
  • New auto-Idle shutdown system helps reduce unproductive idle time and saves fuel.

Efficient Hydrostatic Transmission

  • Komatsu designed engine and hydrostatic transmission control technology use large variable displacement pumps and motors to help save fuel and improve performance.
  • A Quick-shift, three-speed mode (heavier dozing) and variable, 20-speed customizable transmission mode (fine dozing), provide greater flexibility for a variety of applications and personal preferences.   
  • Operator selectable (E) Economy and (P) Power modes, allows the operator to easily switch between working modes, to meet working conditions.  
  • A single pedal (Decelerator/Brake), can be easily configured for constant engine speed control or function as a traditional decelerator.

NEW Advanced Monitoring System

  • A large 7” multi-lingual, high-resolution LCD color monitor with Ecology Guidance, helps operators monitor machine performance to maximize fuel efficiency.
  • Pioneering KOMTRAX® Level 5 telematics provides key machine information, including KDOC status, DEF consumption, fuel level, operating hours, location, cautions and maintenance alerts. Machine information can be monitored through the internet or smart phone.
  • New standard Operator Identification System makes it possible to view Komtrax data by job, application or operator.
  • Komatsu advanced diagnostics are integrated into the monitor for troubleshooting without a laptop or additional software.
  • Up to 5 programmable individual operator settings allows the machine to be easily set up for different operator preferences.

Reliability and Durability

  • Komatsu designed components improve machine durability by reducing component complexity and providing increased serviceability. Strong steel castings throughout, improve rigidity and strength.
  • A rear mounted single-plane cooling system with a swing-up, reversible, hydraulically-driven fan improves access for easy maintenance.
  • Standard Parallel Link Undercarriage System (PLUS) rotating bushing provides up to 40% lower maintenance costs and up to 2X longer wear life.
  • The Power Angle Tilt (PAT) 6-way blade has bolt-on wear components, cylinder rod covers, and Kevlar wrapped hydraulic hoses to protect from jobsite debris.
  • A high-capacity (4.4 yd3) PAT blade can increase production by up to 15% on the PX model.
  • Triple labyrinth final drive shield design helps increase reliability and durability.