Engines for the three models of the new C Series dozers from New Holland feature its well-proven SCR technology, which offers a 10.5% fuel saving compared to the previous generation, based on hourly fuel consumption.
FPT Industrial’s 6.7-L engine delivers an incremental power of 9% for the D125C and D180C and 16% for the D150C. As a result, the engine is more reactive to load changes, and the torque growth is higher to avoid big engine rpm drops. NH claims that the combined effect of its SCR technology and the performance delivered by the engine can drive up the new models’ efficiency by 19%.
C Series dozers now feature a hydrostatic transmission that delivers drawbar pull of 213 kN (24 ton) for the D125C, 311 kN (35 ton) for the D150C, and 372 kN (42 ton) for the D180C. The entire system has been redesigned with a new layout in which the oil is delivered directly to radiators instead of the tank, which now operates as a reservoir of cooled fluid to further improve performance: the air-to-boil level has been increased by 8% from 460 to 500°C (860 to 932°F).
The D150C and D180C feature a new “V-shaped” cooling package that increases the cooling surface for better efficiency and easier radiator cleaning. This solution, together with the hydraulic reversible fan, reduces the radiator cleaning intervals. It also cuts fuel consumption, as the oil flow is strictly linked to the cooling demand. The reversing intervals can be set either electronically on the onboard computer or engaged manually.
Changing the reversing setting electronically allows the operator to choose between soft, medium, and aggressive reversing modes for greater comfort and productivity. With the exclusive Proportional Dozer Control (PDC) mode, once the operator sets the maximum allowed speed, he can move the joystick forward or backward to increase or reduce speed continuously, achieving greater accuracy in fine grading applications.
The new cab, which is 100 mm (4 in) further forward than in the previous generation, provides heightened visibility on the blade and ensures better dozer balance. In terms of controllability, the new electrohydraulic joystick allows for enhanced leveling performance and complete integration with the most common GPS and laser guidance systems. The three models are available from the factory with a pre-installation kit for Topcon, Trimble, and Leica electronic blade controls.
New blade control joystick features include several automatic functions, such as the “shaking mode” that automatically shakes the blade for faster cleaning and the “grading mode” that when engaged reduces blade speed by 50% for more accurate operation or enables the GPS control when one is installed. The blade reaction also has three possible settings, similarly to the hydrostatic transmission: soft for fine leveling, medium for most applications, and fast for heavy dozing when it’s needed to prevent the engine from stalling.
The chassis has been redesigned for improved reliability and accessibility to components. The blade cylinder geometry has been optimized to deliver faster reaction and higher pushing force. The new box section design of the frame is particularly strong and prevents twisting when working with the blade at an angle. In bulldozer configuration, the patented Equistatic device distributes the effort equally on the two push beams independently of the blade’s tilting, so that the wear of the frame and related components is reduced.
When working in abrasive conditions, the exclusive Advanced Track Life tracks last twice as long as standard lubricated tracks. The system consists of two coaxial bushes where the external one is free to rotate when in contact with the sprocket, drastically reducing wear caused by friction. The sprocket has been modified with fewer teeth but with 40% more material under the tooth root area that triples the wear material between the teeth.
The new frame design minimizes the time needed for the daily checks. All the main service points are within easy reach and the greasing points are grouped. Three belly plates are located on the lower part of the machine and a fourth wide one in the rear for oil replacement or transmission work. The transmission can be reached from the cab through a dedicated door. Hydraulic and electric components checks can be carried out from the ground simply by opening the cab’s two lateral hoods.
The undercarriage covers have been designed with a 49° degree angle to improve the self-cleaning effect when working in muddy conditions, reducing maintenance time for periodical machine cleaning.
New options include a three-shank ripper, dedicated protection and winches for forestry applications, and front and rear tow hooks for standard applications.