Caterpillar has introduced three new articulated trucks with numerous new features compared to their C-Series predecessors.
Alongside new operating stations, the 730, 730 EJ (Ejector) and 735 are enhanced with new controls, transmission-protection features, new hoist-assist system, advanced traction control system, new stability-assist system, and a fuel saving eco mode.
As well, the design of the 730 and 730 EJ is enhanced with automatic retarder control and a hill-start feature. The 735 retains these features from its C-Series predecessor and further incorporates significant design refinements that include a new Cat C13 ACERT engine, Cat CX31 transmission, which is also on the 730 and 730 EJ, and structural and dimensional modifications that reduce empty weight by 22 per cent, while retaining the productivity of the outgoing 735C. These features combine for an up to 18 per cent gain in fuel efficiency.
The cab’s new external spinal-ROPS is designed using a rear-quarter glass that eliminates a structural pillar in the C-Series design to improve rear visibility. A new wake-up feature initiates the machine’s displays when the door is opened. As well, the overall cab design results in lower inside sound levels at 72 dB(A), a 7 dB(A) reduction compared to previous models of the articulated trucks.
All three, six-wheel articulated trucks may be equipped with the optional new infrared glass, which reduces solar heating inside the cab. As well, left- and right-hand sliding windows increase ventilation and allow communication with workers and the loading-vehicle operator.
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A new, automatic HVAC system positions more vents above and behind the operator for increased heating and cooling efficiency. A new heated/cooled seat allows operators to dial in their preferred personal-comfort settings.
Cat Connect Payload is another optional feature on the articulated trucks. The tech feature calculates payload via sensors on the walking-beam suspension, and load-status lights at all four corners of the cab roof to ensure visibility to the loader operator from any angle. In addition, the standard Cat Detect/Stability-Assist system monitors the working angle of the tractor and body, as well as the grade, and cautions the operator if the machine is approaching the set threshold angle, stopping the dump process if continued action may result in potential tipping.
The Cat Advanced Automatic Traction Control system features refined technology for proactively applying differential locks to avoid wheel spin. Also, a terrain-based throttle-smoothing system prevents acceleration surges when travelling over extremely rough terrain that makes keeping a steady pressure on the throttle pedal difficult.
A new combined transmission-and-hoist lever provides single-lever control of vehicle speed and body-hoisting functions to reduce operator effort and to automate repetitive operations. Furthermore, a switch in the cab allows operators to choose either manual or assisted hoisting control, the latter selection automatically applying the waiting brake, shifting the transmission to neutral, and raising the body to maximum angle at engine high idle.
Assisted hoisting returns the body to the lower position with the flick of a switch. Both raise and lower functions feature automatic cushioning and speed reduction at limits of movements.
New buttons in the combined transmission and hoist lever allows setting machine speed and selecting the transmission waiting brake. A new shift-protection system brings the truck to a safe stop if a directional shift is made while the truck is moving. The new combined shifting/hoisting lever also incorporates a parking position. A tertiary brake switch sets the parking brake in the unlikely event of main and secondary braking malfunction.
Model specs for the articulated trucks
The new 735 replaces the Cat C15 ACERT engine with the Cat C13 ACERT, rated at 428 hp. The new 730 and 730 EJ continue to use the Cat C13 ACERT engine, rated at 367 hp.
The C13 engine used in all the new trucks is available in configurations to meet emissions standards of both highly-regulated and lesser-regulated countries.
The 730 EJ is designed to eject loads while travelling, providing positive dumping of the entire load, and also to work in areas with overhead restrictions and with soft underfoot conditions with improved machine stability.
The 730 has a rated payload capacity of 28,000 kg, while the 730 EJ has a 28,120-kg capacity. The 735 has a rated payload capacity of 32,000 kg.