Komatsu D37-23 and D39-23 crawler dozers have been upgraded with Tier 4-Interim SAA4D95LE-6 diesels.
Komatsu D37-23 and D39-23 crawler dozers have been upgraded with Tier 4-Interim SAA4D95LE-6 diesels that cut fuel consumption by up to 10 percent over predecessor models while retaining the same horsepower ratings: 89 and 105 horsepower, respectively, at 2,200 rpm. Operating weights range from 18,386 to 21,363 pounds, depending on configuration and model. Long track EX and low-ground-pressure PX models are available. A variable-flow turbocharger, direct-flow air filter, high-pressure common rail fuel injection, and exhaust gas recirculation (EGR) result in precise air flow management and more complete combustion, eliminating the need for a DPF, Komatsu says. Forward cab design and a steeply sloped hood provide more room for operators and move them closer to the blade than in predecessor machines. A newly designed PAT blade has standard adjustable blade pitch that allows the operator to adjust the aggressiveness of the cutting edge. Komatsu’s ergonomically designed Palm Command Control System (PCCS) gives operators maximum control, and thumb push buttons simplify transmission speed setting shifts which are indicated graphically on the monitor.
Liebherr has introduced two Tier 4-Final crawler dozers, the PR 746 Litronic and PR 756 Litronic, joining the PR 736 introduced at Bauma last year.
Redesigned with a Cat C18 ACERT Tier 4-Final diesel, Cat D9T dozer has 436 horsepower at 1,800 rpm.
Weighing in at 106,924 pounds in log-loader configuration, the Komatsu PC390LL-10 has a new Oregon OSHA ROPS/OPS/FOPS/TOPS/WBC certified forestry cab and features a swing system and undercarriage components from the next-size-larger Komatsu excavator.
Komatsu America’s 177-horsepower PC240LC-11 hydraulic excavator, using a Komatsu SAA6D107E-3B engine that is Tier 4-Final emissions certified, has an operating-weight range between 54,490 and 55,129 pounds.