A New Generation

Caterpillar put the operator first with three new B-Series ADTs

As trailed in last month’s edition, Caterpillar have introduced their next generation of articulated dumptrucks (ADTs) with the launch of three new B-Series models – the 452hp 735B, offering a 32.7-tonne payload; the 489hp 740B, offering a 39.5-tonne payload; and the 489hp 740B EJ ejector-body version, offering a 38-tonne payload.

All three models are available with either Tier2/Stage2 equivalent or Tier 4 Interim/Stage IIIB-certified emissions configurations to meet the needs of customers around the world. Both configurations feature revised transmission and traction-control systems that are designed to deliver higher productivity. The new trucks are also said to reduce driver effort and operator fatigue through an improved cab design.

For those countries that require them, all three B-Series trucks will be available with Tier 4 Interim/Stage IIIB-certified Cat C15 ACERT diesel engines that use proven electronic fuel- and air-supply components for maximum reliability, together with a modular after-treatment solution capable of withstanding arduous working conditions.

According to Caterpillar, the systems employed on the Tier 4 Interim/Stage IIIB B-Series trucks produce 90% less particulate matter (PM) and reduce nitrous oxides (NOx) emissions by as much as 50%. Emissions controls include a diesel particulate filter (DPF) to trap soot, while an ‘on-the-go’ regeneration system allows removal of the soot to take place without operator intervention and without sacrificing working time.

Optimized drive train

Caterpillar say they have further improved their six-wheel-drive system with a new, fully proportional torque-distribution automatic traction-control (ATC) system that eliminates the need for driver intervention to maintain maximum traction in difficult operating conditions.

In the previous generation of ADTs, the operator had to manually engage floor- and dash-mounted switches to bring cross- and inter-axle differential locks into play. With the new proportional ATC system, the truck automatically and constantly varies the required proportion of lock-up on both cross-axle and inter-axle diff locks as underfoot conditions change, leaving the operator free to concentrate on driving the truck, without having to think about how to gain the best traction in different ground conditions.

The optimized proportional ATC system works in harmony with the hydraulic steering system and results in improved traction in all operating conditions for reduced cycle times and improved productivity. The automated system also reduces the possibility of system abuse, cutting wear, prolonging component life and reducing costs.

Caterpillar have also upgraded their field-proven automatic transmission with the introduction of a number of significant technological improvements. These changes mean that gear shifting is much smoother, as torque is maintained through each gear change, resulting in improved acceleration, especially on grades, while part throttle shifting at lower speeds results in improved fuel efficiency and easier machine operation, and provides the operator with an automotive feel during gear changes.

According to Caterpillar, this combination of increased engine power, improved transmission and proportional ATC results in improvements in machine and operator efficiency, cutting cycle times and boosting productivity.

Improved operator environment

The B-Series trucks have been designed and built around the operator. Behind the new exterior styling, integrated heavy-duty bumper and fully enclosed belly guards, lies a well-considered operator environment with its new injection-molded dash panel and revised trim.

The redesigned instrument cluster and fully customizable colour multi-purpose display (CMPD) ensure the operator has all the information that is needed. Machine monitoring includes information as diverse as regeneration status, fuel levels, autolube status, load count and major component temperatures. The CMPD also incorporates a live feed from the rear-view camera, which is automatically engaged when reverse gear is selected.

The revised cab interior has a new headliner with switches for electric mirrors, regeneration operations and a heavy-duty CD/radio. An upgraded driver’s seat with new multiple-position adjustments improves the ride quality further, while new materials offer improved durability and long service life, and a heated seat is available as an option.

The heating and air-conditioning system has also been upgraded to improve efficiency and ensure the ideal climate in the cab. The engine hood raise switch is now positioned in the cab for ease of access and increased security. Other improvements include a new cab external grab rail, a repositioned ground-level fuel filler for improved access, new machine width position marker lights and wider-spaced turn indicators. High-intensity high-level work lights are now available as an option.

For further information visit: www.cat.com