Engine
Cat diesel engines are built to the highest quality standards with tight tolerances and proven piston, camshaft, engine block, and fuel system designs for excellent performance and life.
The Cat C18 ACERT is an in-line 6-cylinder diesel engine used in both Cat equipment and in heavy-duty on-highway trucks. Designed, manufactured, and built by Caterpillar, this engine offers the following customer advantages:
- Gross power (SAE J1995) 446 kW (598 hp)
- Net Power (SAE J1349) 415 kW (557 hp)
- Rated engine speed of 1,800 rpm
- Altitude capability to 3048 m (10,000 ft)
- Precise tolerances support greater combustion pressures and more work per unit of fuel
- A water-cooled, waste-gated turbocharger with titanium wheel offers long-life and excellent performance
- Electronically controlled fuel maps and torque curves are integrated specifically for the 772G
- Precise fuel injection using Mechanically Actuated Fuel Injection (MEUI™)
- Low pressure fuel lines up to the injectors
- 500 hour engine oil filter life under normal operating conditions
- Noise and vibration reduction for smooth operation and component life
- Available as either U.S. EPA Tier 2/EU Stage II equivalent OR Tier 3/Stage IIIA equivalent
Transmission
The Cat planetary power shift transmission is an automatic, 7-speed transmission built for heavy-duty, off-road applications including those with long, uphill grades. This transmission is managed with APECS, a strategy that provides an exceptionally smooth ride and allows power to carry through the shift points for excellent performance and speed on grades. In addition to delivering a quick and responsive truck, APECS is managing clutch pressures for long-life reliability.
With its Cat power train components running in 7th gear, the 772G has a top speed of 79.7 km/h (49.5 mph).
Standard Economy Mode
Standard fuel economy is switch activated from within the cab. This economy mode works by reducing engine power. Customers can adjust the savings by reducing the power output of the truck by 0.5 to 15 percent.
Adaptive Economy Mode
This economy mode uses on-board sensors and electronics to find opportunities to reduce power based on steady state speed. Customers will set a productivity threshold that the truck should stay above. The truck will regulate the power level based on the haul profile and may change the power of the truck several times in one haul.
Auto Neutral Idle
Auto Neutral Idle can have a measureable impact on fuel savings. It works by placing the truck in a neutral state if the operator has been idle in a forward gear with the brake or retarder applied. The truck will automatically resume the forward gear when the brake is released or the throttle is applied.
Engine Idle Shutdown
This feature must be activated by the customer. If engaged, the truck will warn the operator that it is about to shutdown after a prolonged period of idling in “Park.” Customers can set the idle time limit. When the time limit is reached, the truck will shut off the engine.
Speed Limiting
Speed limiting is a new feature for G Series trucks and is offered as an alternative to gear limiting. It offers customers both fuel saving and component wear benefits. Speed limiting allows the truck to find the most fuel efficient gear and engine speed while traveling at a set limit. Speed limiting will also work with Automatic Retarding Control (ARC).
Transmission Control Strategies
With its APECS transmission strategy, G Series trucks are carrying more torque and throttle through the shifts. The fuel benefit comes from recovering quickly during shifts and carrying more momentum up grades.
An important differentiator for Cat trucks is their outstanding brake performance. The design principle is one of long-life and excellent performance in quarry, mine, and earthmoving applications.
Hydraulically Actuated Brakes
Cat trucks are equipped with hydraulically actuated, rear brakes and caliper-disc front brakes. Each truck offers primary service brakes, hydraulic retarding, and a parking brake.
Each truck offers primary service brakes, hydraulic retarding and a parking brake.
Two hydraulic accumulators provide the pressure required for the service brakes. The second accumulator acts as a back up. On the rear axle, the oil-cooled, multiple disc brakes have large discs that provide fade resistant performance. The parking brake is applied on the rear brakes and can hold the machine, with rated load, on a 15 percent slope. In turn, the service brakes are designed to hold the truck on slopes of 20 percent.
Automatic Retarding Control (ARC)
Automatic Retarding Control is standard on the 772G. This feature controls truck speed by automatically applying brake force when the engine exceeds a set rpm. Operators can adjust the engine speed between 1950 and 2200 rpm. This feature is important because it does the work of controlling truck speed on long, downhill hauls without constant input from the operator; it’s smooth for greater control and has a tendency to provide faster cycle times over manual retarding. As a precautionary feature, ARC will automatically engage to prevent engine overspeeding at any time during truck operation.
Cat Engine Brake
Caterpillar offers an optional engine brake. This engine brake works with ARC to control speed on grade. By incorporating engine braking with Automatic Retarding, customers can reduce brake component wear and achieve faster cycle times.
Traction Control System (TCS)
If your ground conditions are wet or slippery, the 772G is equipped with Traction Control that engages quickly and effectively to control tires that are slipping.
The system is steering sensitive to differentiate between turning or slipping, allowing the system to engage at slow speeds and much sooner in the slip.
Once the system is engaged, it responds quickly by using the hydraulically-applied service brakes, not the spring-applied secondary brake. TCS regains traction faster by instantly modulating braking and power between the two rear wheel groups keeping your haul trucks moving and productive.
By reacting quickly and at slow speeds, tire life and cycle times both benefit.
Note: TCS is optional on this machine.
Caterpillar has body options to meet your material type and application needs. Cat truck bodies will last the life of the truck if properly configured, guarded, and maintained.
Flat Floor and Dual Slope Bodies
Flat Floor and Dual Slope bodies are lined with 16 mm (0.62 in) of 400 Brinell Hardness Number (BNH) high-impact steel.
Two floor types are available, Flat and Dual Slope.
- Flat Floor bodies are ideal for delivering product to a crusher; material unloads in a controlled manner.
- Dual Slope bodies center the load and keep it stable and retained on steeper grades.
Steel Liner
Caterpillar offers a single, 16 mm (0.62 in) steel liner that can be added to the Flat Floor and Dual Slope bodies to protect against high impact and highly abrasive materials.
Quarry Body
Caterpillar offers a purpose-built Quarry body for soft limestone quarries. This body has a 25 mm (0.98 in), 400 BNH steel floor and does not require additional liners if kept in limestone.
Rubber Liner
Customers who are loading extremely hard material that has high impact characteristics should consider a factory-installed rubber liner system. This system is intended for hard rock and should not be considered for machines that could be loaded with clay, cohesive material or hot material.
10/10/20 Payload Policy
Cat bodies are equipped to retain high-capacity loads for long hauls and to travel up steep grades; however, overloading a truck can negatively impact productivity, reduce tire life, and increase haul road maintenance costs.
Caterpillar’s 10/10/20 Payload Policy is in place to help you maximize productivity with optimum component life and availability of your truck. Your Cat dealer can further explain the 10/10/20 policy. For optimum body life, Caterpillar recommends that 110% payloads occur no more than 10% of the time and that the average of all loads equal the target payload. Payload should never exceed 120% of target.
Frames
Cat trucks are known throughout the industry for reliable, long-life frames. Built for off-road maneuvering and haul road conditions, Caterpillar uses castings in high stress areas and box section construction to manage torsion-loading.
Mild steel is used for its tensile strength and ease of welding, an important feature in being able to make field repairs. The frames are built on a platform that rotates 360 degrees, allowing consistent, deeply-penetrating welds. Each frame is subject to quality and conformance testing prior to assembly.
Suspension and Steering
The Cat suspension and steering design offers you the following benefits:
- Excellent ride quality - empty or loaded
- The front struts act as a king pin for long-life in off-road applications
- Nitrogen over oil strut design
- Simple yet rugged steering system that maintains proper tire alignment
- Inverted rear cylinders stay cleaner longer; reduce shock loading to the frame
Both optional and standard features like those described here can increase the productivity of your operators:
Comfort
- Optional automatic temperature control
- Optional left side power window
- Optional heat and air conditioning
- Low-effort access system
- Optional Cat Comfort Series III seat
- Sound suppression
Confidence
- Standard Rollover/Falling Object Protection in compliance with ISO 3471:2008 ROPS criteria and ISO 3449:2005 Level II FOPS criteria
- Optional camera system for visibility behind the machine
- Automatic Retarding Control (ARC)
- Trainer seat
- Emergency egress through right side window
- Optional fluid level monitoring
- An optional Advisor display delivers machine information to the operator
Control
- Standard Automatic Retarding Control (ARC)
- Standard Traction Control System (TCS)
- Speed limiting on the haul
- Excellent visibility to the loading tool
- Primary service brakes, secondary braking
- Slope holding capability on grades up to 20%
- Body up speed limiting while unloading
Cat Gauges and Advisor Screen
The Cat gauge cluster is a standard display found in the cab. It displays real-time machine performance and operating data. An optional Advisor display allows a greater degree of communication with the truck and from the truck.
VIMS™
VIMS is the Cat Vital Information Management System. This information management system is integrated into the engine, chassis, and all other electronic controllers to deliver valuable information on machine health and productivity. This system uses the Advisor Display to communicate data. VIMS reports provide histograms on truck operation, payloads, and cycle times. These reports can help you manage your fleet, site, and provide production levels.
Product Link™
Cat Product Link™ allows remote monitoring of equipment to improve overall fleet management effectiveness. Events and diagnostic codes as well as hours, fuel, idle time, and other detailed information are transmitted to a secure web-based application – VisionLink®. VisionLink includes powerful tools to convey information to our customers and their dealers, including mapping, working and idle time, fuel level and more. Product Link is not available in all areas, please check with your local Cat dealer.
Truck Production Management System
The Cat Truck Production Management System is an optional tool to help you manage your operations. Indicator lights on the truck tell the loader operator they have additional loads to put on the truck (solid green light) as well as one last pass (blinking red light) and then when the truck is loaded (solid red light). Truck Production Management System will track loads, cycle times, and payload data – up to 2,400 cycles – and reports out through the on-board display or VIMS. The system takes two payload measurements; the first after loading and a second as the truck pulls away in 2nd gear. This is done for greater accuracy.
TKPH/TMPH
TKPH/TMPH stands for Ton Kilometer per Hour/Ton Mile per Hour. This optional feature is an on-board tool that takes the manufacturer’s tire rating and in real time, compares it with ambient temperature, payload, and truck speed. If the tires are calculated to be approaching their temperature limits, the operator will receive a warning. If the tire temperature condition becomes critical, your truck can be set up to automatically reduce (or limit) speed to allow cooling.
Your Cat G Series truck is designed to provide operators and technicians with easy access to common service points like engine lockout, machine system lockout, fluid level sight gauges, grease fittings, and access to the engine for regularly scheduled maintenance.
- Engine oil and filter change interval is 500 hours under normal operating conditions
- Hydraulic filters have a 1,000 hour life under normal operating conditions
- VIMS™ trend analysis can track machine health and operation
- A brake wear indicator is standard
- Automatic lubrication is available as optional equipment
- Fuses and breakers are easy to access and organized for simple service
- The radiator and cooling cores are aluminum and modular offering easy cleaning or replacement
- Oil sampling ports are provided for quick and clean collection for analysis
- Fuel system features electric priming
- Fast fill fuel is optional
Commitment Makes the Difference
Cat dealers offer a wide range of solutions, services, and products that help you lower costs, enhance productivity, and manage your operation more efficiently. Support goes far beyond parts and service. From the time you select a piece of Cat equipment until the day you rebuild, trade or sell it, your Cat dealer will stand behind your business with solutions that range from operator training to jobsite solutions. For more information on how Caterpillar and its dealers can support you, please visit the following web sites:
www.cat.com/safety
www.Mining.cat.com
www.Caterpillar.com
www.Cat.com
Safety
At Caterpillar, safety is embedded in our culture. As we design a truck, we take the safety of the operator and personnel working on the ground very seriously.
- We incorporate a rollover protected and falling object protected cab structure that supports the weight of the machine and its load.
- We design our trucks for easy access with handrails for three-points of contact and non-skid step surfaces with a tread plate that sheds material and provides excellent traction.
- Optional fluid level monitoring from the cab.
- Our cab offers excellent visibility around the machine with mirror choices and an optional camera system for 115 degrees of visibility behind the truck.
- Our truck brakes are designed for long-life without fading and include a brake wear indicator.
- Speed limiting to regulate haul speeds.
- Optional Traction Control works to return traction on slippery ground.
- Customers can lock out machine steering and secure the body in the up position during service.
At Caterpillar, we can further support you and your business with best practices and safety talking points with your employees.
Sustainability
We bring about progress for our communities by producing aggregate and minerals for new roads, bridges, and energy. Cat trucks are being designed to do this work with less of an impact on the environment, by being quiet, using less fuel, emitting fewer emissions, and incorporating solid, long-life designs and components.
