Caterpillar has released its new C Series of large articulated trucks in Australia.
The C Series consist of three different machines – the 735C, 740C EJ and 745C – and builds on the previous B Series, offering a range of new features.
With improved payload capacities, including up to a 1.5 tonne increase of the top of the line 745C, C Series trucks can lower costs per tonne by reducing cycle times, saving fuel, and easing the operator's work load.
The new features include new transmissions with expanded electronic control, automatic traction control, hill assist and waiting brake systems, and an optional payload weighing system.
The 735C has a rated power of 337kW and payload capacity of 20.5 cubic metres.
The 740C EJ has a rated power of 381kW and 23 cubic metres, while the 745C has rated power, but a payload capacity of 25 cubic metres.
All of the vehicles have three axles and a six wheel drive configuration.
Caterpillar product application specialist Gary Tang said the increased payload and power offered by the top of the line 745C means increased productivity on site.
“The 745C is designed to speed up haul cycle times, and the increased payload doesn’t come at the cost of size – it weighs less when empty, but measures up at about the same operating weight as the B Series predecessor when loaded,” Tang said.
“Haul cycle times will be improved across all C Series articulated trucks, in comparison to the B series, when in normal operating conditions.
“C Series Articulated Trucks are fitted with the new Cat CX38 High Density Power Shift transmission, which provides a range of speeds and enhancements that add greater degrees of flexibility for customers in a variety of applications,” he added.
This transmission system has nine forward speeds, two reverse speeds, and a number of electronic features that can enhance overall performance and productivity such as an Electronic Clutch Pressure Control which modulates transmission-clutch engagement for smooth shifting and extended component life.
It also has an Advanced Productivity Electronic Control Strategy that aids workers in optimising gear selection in all normal operating situations.
Another new feature is Shift Torque Management, which combined with the improved Shift Control Logic feature, maintains consistent torque flow though the transmission during gear-range changes, provides automatic shift selection tailored to machine operation, and automatically downshifts for acceleration.
The range’s new Part Throttle Shifting also allows shifting at lower engine speeds, resulting in improved fuel efficiency, quieter operation, and easier low-speed manoeuvring.
Tang added that all C Series trucks are equipped with an Automatic Traction Control (ATC) feature that adjusts the level of engagement for the clutch locks in the inter-axle differential and in the three cross-axle differentials.
“All trucks encounter changing terrain and underfoot conditions, and ATC makes the relevant adjustments while the machine is moving, eliminating the need for operator intervention,” he said.
“The system maintains optimum traction for steady production, relieves the operator of manually engaging the system, helps save fuel by proportionally applying the locks based on operating conditions, and does not hinder tight-manoeuvre steering.
Safety has also been improved due to Automatic Retarder Control (ARC).
“Retarding control for the C Series models can now be set to fully automatic, in addition to manual control,” Gary said.
“In automatic mode, the machine will fully control speed, depending on the grade, through a combination of engine compression brake, gear selection, and service-brake application that is fully automatic, and without operator intervention.
“The automatic system is available for both forward and reverse operations, and the manual system provides two levels of engagement for more experienced operators.”
Other upgrade features include the Hill Assist system, which facilitates stopping and starting on grades, and the Waiting Brake system, which temporarily applies the service brakes during pauses in the work cycle, whether waiting at the loading or dumping site or delays from site congestion.
The new 740C EJ ejector model, which combines the 745C's tractor with a horizontal-discharge body, provides added versatility and safety in certain operations.
The 740C EJ can unload material to uniform depths while traveling at speed, potentially reducing the need for on-site spreading equipment, and can discharge the load with added stability in soft underfoot conditions, on side slopes and grades, and in environments where overhead obstructions are present.
Cat Connect technologies Cat Connect PAYLOAD technologies for the 735C, 740C EJ, and 745C help customers optimise operations and improve overall jobsite efficiency.
With Cat Production Measurement (CPM) as an option, operators can measure and deliver accurate payloads to help boost productivity, lower costs and prevent the potential for overload damage.
When used with Cat Connect LINK technologies, additional payload data can be remotely accessed via Cat Product Link and VisionLink.