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| ARTICULATED TRUCKS 740 C EJECTOR |
The Cat 740C EJ with a 23 m3 (30.1 yd3) 38 tonnes (42 ton) capacity offers proven reliability, durability, high productivity, superior operator comfort and lower operating costs.
With a focus on unique, adaptable productivity, the 740C EJ has many updated and improved features, an all new power train and new ease of operation features including Automatic Retarder Control.
- Engine
Every Tier 4 Final/Stage IV Cat engine with ACERT Technology is equipped with a combination of proven electronic, fuel, air and aftertreatment components. The right technologies fine-tuned for the right applications result in:
- Improved fluid efficiency of up to 5% improvement over Tier 4 Interim/Stage IIIB products (including Diesel Exhaust Fluid consumption).
- High machine performance across a variety of applications.
- Enhanced reliability through commonality and simplicity of design.
- Maximized uptime and reduced cost with world-class support from the Cat dealer network.
- Minimized impact of Emission Systems: designed to be transparent to the operator without requiring interaction.
- Durable designs with long life to overhaul.
- Delivering better fuel economy with minimized maintenance costs while providing the same great power and response.
Advanced MEUI™-C Injector
Advanced MEUI-C injector platforms deliver increased injection pressures and more precise fuel rates. These durable injectors enhance responsiveness while controlling soot.
Innovative Air Management
Cat Tier 4 Final/Stage IV engines feature innovative air-management systems that optimize airflow and enhance power, efficiency and reliability.
Cat NOx Reduction System (NRS)
The NRS captures and cools a small quantity of exhaust gas, then routes it back into the combustion chamber where it drives down combustion temperatures and reduces NOx emissions.
Aftertreatment Technologies
The aftertreatment solution utilized for Tier 4 Final/ Stage IV products is the next evolutionary step for Cat engines with ACERT Technology. To meet the additional 80% reduction in NOx emissions required by Tier 4 Final/Stage IV emission standards, Caterpillar engineers only needed to add one new system to the already proven aftertreatment solution in use, Selective Catalytic Reduction (SCR).
Diesel Exhaust Fluid (DEF)
Cat engines equipped with a Selective Catalytic Reduction (SCR) system inject Diesel Exhaust Fluid (DEF) into the exhaust to reduce NOx emissions. DEF is a precisely mixed solution of 32.5% high purity chemical grade urea and 67.5% de-ionized water.
Engine Compression Brake
The engine compression brake improves retarding response and increases retarding power for controlled descent of grades.
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- Transmission
The new Cat High Density Power Shift (HDPS) nine-speed forward two-speed reverse transmission, designed specifically for Articulated Trucks, features Advanced Productivity Electronic Control Strategy (APECS) and Electronic Clutch Pressure Control (ECPC) which deliver smooth gear changes with improved acceleration and higher productivity.
Rimpull has been increased in both forward and reverse.
Speed hold/limiting function allows the machine speed to be limited in 1 km/h or 1 mph steps to conform to site speed restrictions.
Gearshifts have been significantly improved to maintain direct drive lock-up, and reduce dropping into converter drive. This helps maintain ground speed and gradeability.
Variable shift points used based on the operating conditions, which also aid in maintaining ground speed during gear changes on grades.
Torque Converter
Larger diameter torque converter, configured for off highway applications, allows the higher engine power to be transmitted more efficiently to the lower power train.
- Automatic Features
Automatic Traction Control (ATC)
The ATC system successfully introduced on the B Series has been further enhanced for even better performance. Application of the inter and cross-axle differential locks is ‘on-the-go’ and fully automatic. The operator does not have to think about when and where to engage either diff lock. Sensors monitor the machine and wheel speeds, enabling instant response in low traction conditions. Operation is seamless and smooth, eliminating wheel slip for maximum traction and therefore productivity.
Clutches are automatically disengaged when ground conditions allow, maximizing efficiency when steering or on uneven ground.
ATC reduces tire and driveline abuse, eliminating lost efficiency caused by improper manual operation of the differential clutches, and reducing the cost of premature tire replacement.
Automatic Retarder Control (ARC)
In automatic mode, use of the retarder is much easier for the operator. As with ATC a number of machine operating aspects are monitored, and if required the engine compression brake is engaged automatically. The system can help towards eliminating engine overspeed, improving safe machine operation and reducing cycle times, yet still with the flexibility of manual control if needed.
Regeneration
When set to automatic, regeneration will occur without any interaction from the operator. The three modes of regeneration shown below allow the articulated truck to adapt to specific site conditions in the most efficient manner.
Automatic: The machine carries out ‘on-the-go’ regeneration when the engine control module determines conditions are acceptable. The operator requires no action and the articulated truck is not required to stop working.
Automatic: Low idle regeneration is initiated when the machine is in a reduced operating mode for a predetermined period of time, and a number of conditions are met. The system is designed so that the operator can interrupt regeneration at any time.
Manual: A manual regeneration is initiated by pressing the regeneration switch for 5 seconds. The machine must be brought to a non-operating mode in order to perform a manual regeneration.
- Suspension and Braking
Front Suspension
The three-point front suspension oscillates ±6° to provide a smooth ride, allowing the operator to travel at speed over rough terrain and softening impact loads on structures and components. Large bore, low-pressure cylinders are purpose designed for tough applications and offer a soft, smooth ride.
A-Frame Construction
The front suspension uses an oscillating A-frame with a lateral tie rod to control axle sideways movement and stability.
Rear Suspension
Features a walking beam with Caterpillar designed rear suspension mounts, which have long life and provide a reliable, and stable ride for excellent load retention.
Mounting Points
Suspension mounting points are integrated into the axle housing, increasing reliability.
All Axle Enclosed Wet Brakes
Provide smoother retarding and braking, with improved holding in slippery conditions and on grades.
Hill Assist
Eliminates potential ‘roll-back’ on grades. If an operator stops the machine on a grade, when taking his foot off the service brake pedal the machine will automatically hold the service brakes on for a number of seconds to prevent the machine from rolling backwards.
- Operator Environment
Spacious Two-Person Cab
The large two-person cab, offers a comfortable working space for both the operator and a passenger. The passenger seat is fully padded with a backrest and a wide, retractable seat belt for a secure and comfortable ride. It is also positioned adjacent to the operator, giving both the operator and passenger a clear view of the instrument panel, controls and the road. The storage space behind the operator seat has been increased, and access improved. The design and layout is common across all C Series Articulated Trucks.
Air Suspension Seat
The air suspension seat provides improved operator comfort with a cushioned upper high back, adjustable damping with three settings, ride zone indicator and adjustable lumbar settings. It is fully adjustable to provide the optimal driving position.
Cab Atmosphere
The air conditioning system helps to keep you comfortable whatever environment you are operating in.
Waiting Brake
As the name implies, anywhere you are waiting you can use this feature to remove the need for repeated application of the parking brake. For example, if you are holding the machine on a grade, in a loading or dump area, select neutral and press the yellow button on the gear select cane. This will automatically apply the service brakes, without the need to apply the park brake. To disengage, put the machine in gear and the brakes are automatically released.
- Ease of Operation
Control Layout
The cab is designed to make all aspects of machine operation as simple as possible. The controls and gauges are easy to read and straightforward to operate, the controls and gauges allow the operator to focus on safe machine operation while maintaining productivity.
Dashboard
The integrated wrap-around dash puts all controls within easy reach of the operator. Featuring LED illuminated rocker switches for the dash dimmer, rear wash wiper, hazard warning, work lamp, secondary steer, A/C and cigar lighter. Delivers an automotive feel with the industrial strength you would expect from Caterpillar.
Color Multi Purpose Display (CMPD)
The dash mounted display unit shows the operator various levels of performance and condition pages as well as machine warning categories. These include performance data, configuration settings, operator and machine totals, service information, various machine status parameters, machine payload information (when fitted), and the video feed from the rearview camera.
Bluetooth™ Stereo Connectivity
Make and receive calls via Bluetooth equipped mobile.
- Durability and Reliability
Front Frame
The front frame design features a large box section and wide, stiff frame beams to handle torque loads. The divergent frame design decreases stress in the hitch area and optimizes suspension geometry. The frame design makes maximum use of robotic welding for increased durability.
Rear Frame
Twin-box construction minimizes stress concentrations and provides low weight with long service life.
Suspension
The three-point oscillating axle front suspension provides unparalleled ride quality. It also protects the truck from adverse road conditions by absorbing shock loads that would reach the frame.
Articulating/Oscillating Hitch
The articulating hitch provides the truck with steering articulation, and the oscillation ensures all-wheel ground contact in rough terrain.
Hitch Construction
Field proven two-piece construction features a durable cast steel head bolted to a hard wearing forged steel tube.
Dump Body Design
The 740C EJ has a large target area to provide consistently high load-carrying capacity. Its ejecting mechanism gives clean material discharge, which maximizes production and avoids the waste of carry-back.
Output Transfer Gear
Distributes drive to the tractor and trailer and includes a wet clutch differential lock for optimum traction in poor underfoot conditions.
Service Brakes
Dual-circuit, all wheel braking system. The full power hydraulic system actuates enclosed, oil immersed, multi disc, multi plate brakes with independent front and rear circuits and accumulators.
Parking Brake
Located on the center axle in an elevated position, it is spring applied and hydraulically released.
- Versatility
Ejector
The ejector body offers clean load ejection ‘on-the-go’ and the capability to work safely in areas with restricted overhead clearance and soft underfoot conditions.
Spreading
The truck can eject and spread the material while moving, reducing additional spreading and dozing equipment. ‘On-the-go’ ejecting results in faster cycle times and reduced power train loads.
Stability
Ejecting the load without raising the body increases stability, allowing load dispersal on inclines, side slopes and in very soft underfoot conditions especially on landfill sites.
Overhead Clearance
The truck can eject in areas with reduced overhead clearance, such as around overhead lines or in tunneling and underground operations.
The 740C EJ shares the versatility of the standard 735C and 745C Series Articulated Trucks, operating in the same conditions, but offering unique capabilities that stretch the operation envelope.
Carry-Back
The body design eliminates material sticking to the body, which increases productivity, improves fuel efficiency and lowers cost per ton.
Body
Reinforced body is made from thick high-yield, heat-treated Brinell hardened steel (Brinell 450 on the base and sides) that provides exceptional durability. Ejector top rails are made from high-strength alloy steel. For optimum durability and wear life, the ejector body is designed to work in applications where the material consists of rocks smaller than 152 mm (6 in) in diameter.
Blade
The ejector blade is made from high-strength steel and uses technology similar to that proven in Cat wheel tractor-scrapers.
Cylinder
A four-stage, high-speed, double-acting cylinder is specifically designed for horizontal mounting and smooth load ejection.
- Dimensions
mm ft/in
1 3076 10'1"
2 1107 3'7"
3 6761 22'2"
4 579 1'10"
5 1966 6'5"
6 4590 15'0"
7 11 776 38'7"
8 3415 11'2"
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mm ft/in
9 3746 12'3"
10 3966 13'0"
11 4041 13'3"
12 4166 13'8"
13** 3522 11'6"
14*** 2687 8'9"
15^ 3370 11'0"
16^^ 3530 11'6" |
* OAL
** Body Width
*** Track Width
^ Over Fenders
^^ Over Tire Bulge
Unladen dimensions with 29.5R25 standard tires.
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