Built for power, reliability, economy, durability and low emissions.
Cylinder BlockEngine durability starts with a strong foundation - the cylinder block. The 3456 cylinder block consists of a deep-skirt, cast-iron alloy design made from 206 700 kPa (30,000 psi) minimum strength cast iron. Cylinder blocks are cast at Caterpillar's Mapleton foundry, where intensive process control programs ensure that the highest quality is maintained.
One-Piece Cylinder HeadThe high-strength cylinder head of the 3456 is designed for efficient breathing, which helps promote fuel efficiency. The cylinder head and intake air manifold are integrated, so no maintenance items are required such as gaskets, bolts and washers. Coolant flow throughout the cylinder head and high strength materials help deliver long cylinder head life.
Superior Fuel EconomyThe 3456 features the proven Caterpillar EUI fuel system, with mechanically actuated, electronically controlled unit injectors (EUI), as well as state-of-the-art Advanced Diesel Engine Module (ADEM™ II) electronic controller, for the most precise timing and fuel metering.
Cooling SystemThe 5090B layout puts the coolant radiator and oil cooler side-by-side to increase cooling efficiency and reduce the noise from the cooling system. The parallel layout of the radiator and the oil cooler improves accessibility to the cores of the cooling units, providing easy cleaning.
Emission MeasuresThe 3456 engine in the standard configuration meets the following emission regulations:(1) EPA Tier 2(2) EU Stage II(3) MOC Step 2
Engine MountsThe engine is mounted to the main frame using six rubber engine mounts. These mounts reduce the amount of vibration that is transferred from the engine into the main frame for a smooth, quiet machine.
Overhead Camshaft and Valve TrainThe overhead camshaft and valve train are key to engine efficiency through precise control of valve timing. The camshaft of the 3456 is located in the cylinder head to allow the use of higher fuel injection pressure, which is absolutely critical for performance, low fuel consumption and lower emissions.
Undercarriage and Structures
Durable undercarriage absorbs stresses and provides excellent stability.
CarbodyTo meet transportation requirements, the 5090B undercarriage features a variable gauge type. This design allows the track roller frames to be bolted to the carbody, enabling the machine to be made narrower for ease of transport. The carbody utilizes a new columnless design that allows the swing bearing to be directly mounted on the top plate for more rigidity and strength.
TrackThe track links are sealed to prevent entry of dirt and are strutted for high strength and impact resistance. The 5090B is equipped with a standard variable gauge undercarriage.
Track RollersTrack rollers are a heavy-duty type with increased strength for longer life. They also use solid pins for retention of the collars and a more secure design.
Travel MotorsTwo-speed axial piston hydraulic motors provide the 5090B drive power. Speed selection is automatic when the high-speed position is selected. Travel motors have internal disk brakes to hold the machine when stationary. The travel motors are protected from damage by rigid covers.
Final DrivesThe final drives are a new compact design with three-stage planetary reduction. They incorporate the latest seal technology to prevent entry of dirt and loss of oil.
Upper FrameThe rugged main frame is designed for maximum durability and efficient use of materials. Robotic welding is used for consistent, high quality welds. The main channels are box sections connected by a large diameter tube in the boom foot area to improve rigidity and strength. The outer frame utilizes curved side rails for rigidity against bending and torsional loads.
Caterpillar hydraulics deliver power and control to keep material moving at high volume.
Hydraulic SystemThe 5090B hydraulic system includes a three-pump system with an independent swing circuit and a hydraulic circuit utilizing the proven Proportional Priority Pressure Compensated (PPPC) system. It features Caterpillar-developed electronic control and activation to ensure high hydraulic system efficiency and excellent productivity.
The load sensing PPPC system provides the following features:
- Cylinder speed is directly related to operator's movement of the joystick from feathering to full speed.
- Flow to cylinders during multifunctional operation is directly controlled by the operator and is not dependent on loads.
- Controller reduces pump output to minimum to save power when joysticks are in neutral position.
Power Management ControlThe pump-valve electronic controller is central to power management control and provides highly efficient control for the pumps, valves and engine.
Component LayoutThe hydraulic pumps, control valve and hydraulic tank are located close together to minimize the length of piping. The swing control valve is mounted directly on the swing motor. Main and swing pump suction and discharge lines have large diameters. These large diameters, combined with the component layout, guarantee high efficiency.
Swing PerformanceThe three-pump system with independent swing gives priority to the swing circuit for strong swing acceleration and easily controlled multi-function operation. This performance has been further enhanced by an increase in swing torque of about 16 percent.
Auxiliary HydraulicsAn auxiliary valve is standard on the 5090B and is used for the bottom dump circuit. It is driven electrically based on commands from the pump-valve controller.
Front Linkage Hydraulic SystemThe hydraulic system for the implement consists of two boom cylinders, a stick cylinder, two bucket cylinders, two bottom dump cylinders and a master cylinder.
Hydraulic Oil Filtration SystemThe 5090B hydraulic system features six standard filters in four types. These filters improve reliability, extend the life of hydraulic equipment and hydraulic oil, boost performance and reduce running costs. A fine filtration system is available as an attachment.
Third Pedal for Straight Travel (attachment)A third pedal for straight travel is available as an attachment. This pedal allows straight machine travel using only a single pedal.
The 5090B delivers higher production and efficiency to all jobs.
Parallelogram LinkageThe Cat 5090B Front Shovel features parallelogram-type front linkage with a master cylinder. The parallelogram linkage automatically keeps the bucket parallel to the ground. This allows excellent penetration, fast loading and a smooth floor clean-up. The operator can concentrate on the boom and stick rather than bucket adjustments. The master cylinder circuit automatically maintains a level bucket while raising the boom. It aids in bucket positioning both above and below grade, eliminating constant adjustment during the work cycle. The master cylinder arrangement also uses bucket cylinder circuit pressure to increase the boom lifting force.
BoomThe boom is 4.6 m (15 ft 1 in) long and features a rigid structure with a number of steel castings. The cast steel portions are structured into a box to reduce the weight of the boom nose and boom foot.
StickThe 5090B offers a 3.4 m (11 ft 5 in) long stick. The stick nose and stick foot are made of cast steel. The middle portion has a box structure fabricated with steel plates. The stick cylinder-mounting bracket is reinforced from the inside.
Bottom Dump BucketThe recommended bucket for the 5090B is a bottom dump bucket. It is designed for strength, performance and long service life.
Linkage PinAll pins used in the 5090B front linkage have thick chrome plating, giving them high wear and corrosion resistance. The diameter of each pin is made as large as possible to smoothly distribute the shear and bending loads associated with the digging and lifting forces.
Designed for simple, easy operation, the 5090B operator station allows the operator to focus on production.
Operator EnvironmentThe work station is designed to be spacious, quiet, and comfortable for the operator, ensuring high productivity during a long work day. Seat and console can be adjusted to the operator's comfort level. A positive pressure, filtered, and highly efficient ventilation system is provided. The cab is positioned forward to provide better visibility into deep trenches.
SeatThis high back seat with headrest has a variety of adjustments to suit the operator's size and weight including fore/aft, height and weight. Also included are lumbar support, wide adjustable armrests and a retractable seat belt, allowing the operator to select the most comfortable setting.
Heating and VentilationPositive filtered ventilation with a pressurized cab and an automatic air conditioner come standard on the 5090B. Fresh air or recirculated air can be selected with a switch on the left console.
WindowsThe cab provides excellent viewing through large, wide windows. A sliding window on the cab door allows convenient communication between the operator and nearby workers.
WiperUpper and lower windshield wipers and washers are included as standard equipment to ensure good visibility for the operator in wet or dusty conditions.
MonitorThe Caterpillar-designed electronic control system uses Vital Information Display System (VIDS) as the interface between the machine and the operator or the service person. VIDS includes an analog gauge section, a display screen and a keypad.
ConsoleThe consoles contain the climate controls, start switch, engine speed dial, joysticks, and miscellaneous switches. All items are within easy reach of the operator.
ControlsElectronic joystick controls have low lever effort and eliminate pilot lines. Control pattern can be changed electronically to suit operator preference. The operator can choose a level of gain/response from quicker and more productive to slower and more precise using a button on the console to optimize operation for different applications.
SkylightThe large, fixed-type, Polycarbonate skylight delivers excellent natural lighting and upward visibility. A sliding sunshade is standard and protects the operator from direct sunlight.
Cab ExteriorHandrails are attached to both sides of the cab door to facilitate entry and exit. A filtered air ventilation port on the rear of the cab brings in fresh air. The cab is designed to allow direct mounting of the optional falling objects guard recommended for applications involving overhead operation.
Cab MountsThe 5090B uses six viscous cab mounts. They use rubber and silicon oil to absorb vibrations in two stages. They provide a higher level of vibration dampening than rubber mounts. The mounts also help limit the sound levels in the cab.
Cab RiserTo provide excellent forward visibility for truck loading and other applications, an 870 mm (34 in) cab riser is standard on the 5090B.
Service and Maintenance
Simplified service and maintenance features save time and money.
The service intervals are extended to reduce maintenance costs.
- Engine oil, oil filter and fuel filters at 500 hours.
- Hydraulic oil at 4,000 hours for normal applications with S•O•SSM monitoring.
- Hydraulic oil at 5,000 hours when equipped with fine filtration attachment.
Hydraulic Capsule FiltersHydraulic capsule filters are mounted outside the tank to prevent spills and system contamination during replacement.
Oil Sample and Pressure PortsOil sample and pressure ports provide easy checking of machine conditions.
Service PointsService points are centrally located with easy access to routine maintenance.
Pilot Hydraulic System FilterPilot hydraulic system filter keeps contaminants away from the pilot system.
Swing and Travel Motor Case Drain FilterA swing and travel motor case drain filter keeps contaminants from returning to the tank.
Radial Seal Main Air CleanerRadial seal main air cleaner with precleaner has a double-layered filter element for more efficient filtration. No tools are required to change the element. Operator is alerted to clogged condition by a message on VIDS™.
Water SeparatorWater separator removes water from fuel even when under pressure and is located close to cat walk for easy access.
Remote Greasing BlockRemote greasing block on the boom and three grease points for the swing bearing deliver grease to hard-to-reach locations.
Electronic System ControlElectronic System Control has diagnostic capabilities for Cat Dealers' use. A single connection point allows Cat Electronic Technician (Cat ET) to communicate with all machine controllers.
Complete Customer Support
Cat dealer services help you operate longer with lower costs.
SelectionMake detailed comparisons of the machines you are considering before you buy. What are the job requirements? What production is needed? What is the true cost of lost production? Your Cat dealer can give you precise answers to these questions.
PurchaseThe 5090B is designed for durability and maximum resale value. Ask your dealer about financing options.
OperationImproving operating techniques can boost your profits. Your Cat dealer has training literature and other ideas to help you increase productivity.
MaintenanceRepair option programs guarantee the cost of repairs up front. Diagnostic programs such as Scheduled Oil Sampling and Technical Analysis help you avoid unscheduled repairs.
ReplacementRepair, rebuild, or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.
Product SupportYou will find nearly all parts at our dealer parts counter. Cat dealers utilize a worldwide computer network to find in-stock parts to minimize machine down time. Save money with remanufactured components.