CAT CAT®MT4400D AC AC electric truck

Power train - Cat AC electric

100% Caterpillar

MT4400D AC By Caterpillar Carefully designed and manufactured，It's a 221 metric ton.（244 tons）AC electric truck，All its parts and components are made of Caterpillar Provide，And get Cat Support from the dealer network。 MT4400D The power train is compatible with the 3516C HD Engines work together seamlessly，Ensure a smooth ride and provide unparalleled safety、Serviceability and performance。

Modular design，Extremely easy to maintain

Modular design for easy removal and installation of components。 The engine can be removed separately、Traction alternator/Generator、Electric machinery、Inverter、Grille and Final Driver。 The close-coupled two-bearing traction alternator is easy to install on the 3516.C

HD On the engine。

Operator confidence through superior control

Cat AC drive systems give you the best speed reduction in the industry、Braking and control performance。 Best-in-class dynamic deceleration combined with a blend of wet disc brakes in the rear and dry brakes in the front，Provides excellent control for the operator，Double their confidence.。

High voltage - Low calorie

Cat AC drive is a high voltage system.（2600 V），Capable of operating at a relatively low current。 This can produce less heat.，Make the part size smaller/Lighter weight，While achieving longer component life。

Cat AC electric（Advance）

3516C HD The diesel engine drives the close-coupled traction alternator through an isolation coupler。 The AC power is rectified to a nominal 2600 V To form a DC link。 The DC link feeds the inverter，IGBT Converting DC signal into three-phase AC to drive traction motor。 The motor output passes through Caterpillar The dual reduction ring outputs the final drive to drive the wheel。

Cat AC electric（Slow down）

During retarding，The wheel motor becomes a generator。 Motor power is fed back through the DC link。 This power is fed to the contactor and chopper circuit，And then deplete by a radial grid。 Brushless AC fans blow air through the grille to dissipate power and control deceleration。

Traction alternator

Close-coupled two-bearing alternators do not require shimming or radial alignment，So that installation time is reduce。 The excitation system is a brushless system，Longer maintenance intervals than brush-type system。

Inverter

Inverter uses Mitsubishi Electric IGBT The phase module controls the rimpull of the truck、Direction and speed。 Mitsubishi Electric is IGBT A technology leader。

Traction motor

Each traction motor is a three-phase AC induction motor。 The high-voltage and low-current motor is installed inside the rear axle box。

Radial grating

Radially designed grating located behind deck，Provides a clear view of the right side of the machine。 The grille has a long service life，Withstands the highest retarding power in the industry，At the same time, the noise is significantly reduced compared with the box-shaped barrier.。 AC motors do not require any maintenance，Compared with DC motor system, it can save a lot of costs for customers.。

Variable speed hydraulic blower

Hydraulically driven blower motors provide excellent cooling performance，Ven under extreme environmental conditions.。 Compared to direct drive motors which are dependent on engine speed，The variable hydraulic blower provides the required cooling performance，Even when the truck is idling.。 Variable blowers are better able to keep critical components cool，Thereby ensuring a long component service life.。

Other features

The anti-rollback feature prevents the machine from moving against the operator's intent

The grille drying function allows quick drying of the grille in inclement weather

Traction control system（TCS）Electronically monitors the speed of each wheel and adjusts the torque of each final driven，In order to reduce the risk and keep everything under the control of the operator

Reverse gear limiter ensures that reverse gear is not applied when the machine is moving forward

Cat AC drive system supports trolley drive truck。

Power train － Engine

Engine

Cat 3516C HD It is a four-turbo diesel engine.，Achieve optimal performance in the most demanding mining applications。

Design

3516C HD 16-cylinder design，Use of long effective power strokes，Fuel burns more thoroughly，More efficient。 78.1 liter large displacement、Low speed and robust power rating，This means more road transport time and shorter repair times。

Electronic Control Module（ECM）

ECM Advanced engine management software，Monitoring with self-diagnostic electronic sensor、Control and protect the engine。 Computerized system to determine operating conditions and required power，And the engine can be adjusted at any time.，For maximum performance and efficiency。

Cat Data link

Cat The data link electronically integrates the engine and machine computer systems.，O as to optimize the overall performance of the power train、And reliability is improve、Maximize component life and reduce operating costs。

Cat Electronic Technician

Provide the service technician with an access to Cat Data-link tool for accessing stored diagnostic data，This simplifies troubleshooting and improves machine availability。

Engine/Powertrain integration

Control Software and Integration

MT4400D AC The integrated controls of the simplify truck operation。 They provide：

Excellent slow speed control，To ensure safety in the maintenance area

Excellent throttle acceleration response，Easy removal from loading and unloading area

Dynamic retarding with hybrid service brakes at low speed。

Cat Data link

Caterpillar Proprietary electronics and controls enable complete machine system integration。 Cat The data link port provides a place to access all of the system information for programming function，Replaces a single location for the drive train and engine。 Link to all computer system，In order to：

Optimize power train performance

And reliability is improve，Extend component life

Reduce operating costs

Improve fuel efficiency。

Cat Braking system

Industry-leading dynamic deceleration

Radial grids are rated at 3.281 MW（4400 hp）- Excellent truck speed control in long deceleration applications。 The radial design is light、Efficient and quiet。

Brake design

The hydraulic brake actuation system has fully adjustable service brakes.（Pedal or manual system）、Fully adjustable auxiliary brake（Pedal or manual）、Loading brake and spring drive for loading waiting/Hydraulically released parking brake。

Rear wet disc brake

Wet disc brakes provide the operator with superior truck control，Double their confidence.。 Cat The oil-cooled brakes are located in the rear wheel assembly，Its design uses a large platter.，Reliable performance，No adjustment is required。 They are of the sealed type，To avoid contamination and extend service life。 These oil bath disc brakes provide excellent braking performance at various speeds.。

Front brake

Four compression forceps/Wheels Dry front brakes provide excellent stopping power，And very strong。

Hybrid braking

All-electric retarding capability will be maintained at a minimum of 3.2 km/h（2.0 mph）The speed of the truck。 Service brakes（According to 60/40split rear and front service brake）The blended braking capacity is available in 3..6-4.0 km/h（2.25-2.5 mph）Realized during，And will be used to stop the truck completely and to keep the truck stationary。

Automatic deceleration control

Operator Controlled Automatic Retarding Control（ARC）Can engage automatically and keep speed constant。 A simple toggle switch is used to adjust the deceleration。

Anti-rollback

Automatic application of service brake，To prevent the truck from rolling in the opposite direction of the intended travel from the stop position。

Reverse gear limit

Make sure that reverse propel is not applied when the machine is moving forward。

Parking brake alarm

If the operator begins to leave the cab before the parking brake is engaged，The parking brake alarm will sound。 This feature helps prevent unexpected machine movement。

Structure

Straight rail frame

MT4400D AC Straight rail design is adopted。 Straight rail design eliminates kinking and breaking，This is the cause of stress concentration.。

Box section construction - Box-type section structure adopts Caterpillar Proprietary steel specification，Extremely low sulfur content and excellent welding properties，And good durability

Deep section main rail - The deep section main rail is located in an important area of the frame，Reduces stress levels and extends frame life

Tubular center beam - Tubular center beam with lift cylinder and axle box attachments eliminates twisting forces and eccentric loads associated with traditional design。 Axle box accessories are integrated in the cross member，The bearing surfaces can be replaced。

Integral four-column ROPS Cab

The design changes the shape of the support structure，Without affecting the cab，This maximizes operator space。 Transversely mounted beams absorb energy by deflecting around the pivot point that has been set，Thereby maintaining the integrity of the cab.。

Single-beam front axle

The single spar front axle is able to share the load on the spar，Thereby steering more smoothly and sharing the tire load，Extend the life of your tires。 This lower structure eliminates the effects of road undulation，Provides better ride comfort and reduces operator fatigue。

Nose cone bearing

MT4400D AC Have a central beam，Includes a wrap-around spherical journal box nosecone connection。 The nose attachment features a large, patented two-piece bearing.，The contact pressure can be reduced to 9653 kPa（1400 psi）Following，Thereby prolonging the service life of the bearing.。 Replaceable bearing surfaces in the axlebox accessories are lubricated and sealed，And integrated in the beam，Convenient for overhaul and maintenance。

Suspension system

The suspension system is designed with nitrogen/Oil suspension cylinder，Supports pin-to-pin mounting，Parts can be serviced and replaced without removing the tire。

Durable design

Double snips at top and bottom U Clamp attachment for easy removal and installation of suspension。 Nitrogen/The oil suspension cylinder reduces the input load in the structures，Thereby extending fatigue life and providing better ride comfort.。

Truck body system

Cat Hopper

The body is an important part of the truck.，It is mounted with the chassis，Works as part of the truck system。 Each body is sized to meet payload requirement，Without sacrificing vehicle balance、Braking or control。

Cat Body selection

Body options include conventional bodies that are commonly used、Lightweight, efficient body and tailgateless coal body。 Liner options can be installed for the body depending on the application requirement。

Conventional body - Based on the mine assessment，Body size and configuration can be customized，O as to meet the requirements of the particle size of the corresponding material,、Hardness、Blocking characteristics and specific needs arising from the combination of the loading tool。 This body provides a good balance of payload and durability（As shown in the figure.）

Efficient（HE）Hopper - Body size and configuration can be customized，O as to meet the requirements of the particle size of the corresponding material,、Hardness、Blocking characteristics and specific needs arising from the combination of the loading tool，This maximizes the payload capacity of the truck

Tailgateless Coal Hopper - Abandoned the often problematic tailgate - Doorless coal car hopper dedicated to coal handling applications。

Monitoring System

VIMS™ 3G Monitoring System

Provides the operator with important machine health and payload information in real time，Guarantee MT4400D AC The performance of the is always at an optimal level。 VIMS Ability to monitor information from all vehicle systems。 Ten can be viewed at the same time（10）Different machine parameters。 Data can be easily downloaded by the service technician，For troubleshooting and planning and cost reduction。

Advisor Display screen

Advisor The display provides real-time performance for the operator or service technician、Maintenance and diagnostic data。 Through it，A large number of machine parameters can be viewed，Including temperature、Pressure、Speed and Payload。

Payload management

Information can be used to manage payloads to improve fleet efficiency and load tool matching， To prevent overloading，Thereby helping to extend component life，Reduce operating and maintenance costs。

External Payload Indicator

Standard external signal lights or optional digital displays help the loading tool operator meet payload targets and minimize overload。

VIMSpc

This external reporting software program allows service personnel to download complete machine health records and job efficiency data。 Can generate health and payload report，In order to manage the machine more efficiently、Reduce downtime and operating costs。

VIMS Supervisor

This optional software makes it easy for mining personnel to manage and interpret VIMS Data，To optimize fleet management and productivity。

Console

Operator environment

Cat MT The series cab can be fitted with two wide reclining seats，And provide wide storage space behind the seat。

Ergonomic layout

To maximize productivity and reduce operator fatigue，Cat MT Series worktops are ergonomically designed，To be comfortable、Complete machine control in a productive and safe environment。 Control device、Joystick、Reasonable layout of switches and instruments，Easy to use。

View

The wide field of vision gives a panoramic view of the surroundings，Clear line of sight on the road，Allows the operator to operate with confidence，Increase productivity。 The operator environment is designed with a curved front glass，Provides a 191-degree field of view。 The support column moves further back，The forward view is more unimpeded。 The location of the deck compartment has minimal effect on the side view.。

Serviceability

Commitment to meet your needs

Cat Dealers offer 24/7（7 days a week、24 hours a day）Support，Deliver solutions around the globe、Services and products，To help you reduce cost、Improve productivity and manage the vehicle fleet。 Professional and technical personnel have rich knowledge.、Experience、Training、Parts and tools，Make sure your MT4400D AC Maintain high availability。

Product support

Caterpillar Leverage global parts distribution network、Dealer service centers and technical training facilities are MT4400D AC Provide support。 Our global network of dealers is spread all over the world，Support your support needs 24/7。

Maintenance service support

Cat Dealers offer a wide variety of service plans，Maximize your machine's uptime and return on investment，These include：

Preventive maintenance plan

Diagnostic services，Uch as S · O · S and TES.

Reconstructed and Remanufactured Product Parties

Customer Support Agreement

Understand the application

Transportation fleet operating and maintenance costs are influenced by the application environment and site-specific factors，Uch as material density、Loading method、Payload、Speed、Grade and haul road design and maintenance。 Cat Dealers can help you understand the impact of application factors and operating practices on maintenance and operating costs。 They also provide training to help operators improve productivity、Reduce downtime、Reduce operational costs and enhance security。

Serviceability

Modular design

Major components can be serviced individually，Minimal removal and installation times。 The main maintenance area has working platforms and ladders./Stairs。 Close-coupled double-bearing generator/The alternator is separate from the engine，The body does not need to be removed for removal - The wheel motors are separate from the final driven。

Ground maintenance

Centralized maintenance point（4 centralized filter service points）Easy access to tank level、Filter、Vents and S·O·SSM Oil sampling port。

Maintenance is simple

Open engine access door with service platform for easy service。 Traction alternator and inverter platforms are easy to inspect、Troubleshooting and Parts Replacement

The hydraulic cabinet displays the critical pressures of all critical systems in one central location。

Separate hydraulic and electrical lines

The hydraulic lines are routed inside the left side of the frame，The electrical runs are routed inside the right side of the frame。 This enables repairs and replacements to be carried out quickly and easily。

Safe

Commitment to product safety

Caterpillar Focus on your safety。 We actively develop machines and features that exceed safety standards.，Always leading the industry。

Control device

Cat The drive control has an anti-rollback function、Traction control system、Parking brake warning upon exiting the cab and automatic retarder for operator confidence。

Isolation

MT4400D AC With ground system locking、VIMS Functions such as monitoring and energy storage dissipation during shutdown。 These features as well MT4400D AC Good maintainability，Allows the technician to perform repairs safely and quickly。

Cab access

600 mm（24"）Wide Standard Ladder、Flat plate、Pedal device and optional electric access ladder accessories facilitate safe access to the cab。

Sustainability

Sustainability function

MT4400D AC Mining trucks provide continuous rear axle filtration and longer maintenance intervals，Thereby contributing to the reduction of waste emissions that affect the environment.。

Remanufacturing options

Cat The truck can be renovated，And that service life is long。 Many MTThe 4400 achieved a rack life of more than hours 100000.。 Parts can be remanufactured，O as to be used more than once。

Engines with advanced technology

Cat The engine is equipped with components using advanced technology.，Helps improve fuel economy and reduce emissions。

12000 Hours Extended Life Coolant and Lower Oil/Lubricating oil consumption

Compare to competitor's product，MT4400D AC Excellent low fuel and oil consumption， Thus reducing the impact on the environment，Reduced cost of ownership and service times。