M322D Material Handler

M322D Material Handler

The D series Material Handlers incorporates innovations for improved performance and versatility.


Engine Model
Cat® C6.6 ACERT™
ISO 9249
EEC 80/1269
Net Power
Maximum Torque - 1,400 rpm
Gross Power


Operating Weight
23 550 kg (51 919 lb) to 25 675 kg (56 604 lb)
Rear - Dozer, Front Outriggers (3)
Rear - Dozer, Front Outriggers (2)
Front and Rear Outriggers (1)
Dozer Blade
MH Undercarriage - 4 Welded Outriggers (3)
MH Undercarriage - 4 Welded Outriggers, Push Blade (1)
MH Undercarriage - 4 Welded Outriggers (1)
Rear - Dozer Only (3)
MH Undercarriage - 4 Welded Outriggers, Push Blade (2)
Rear - Dozer Only (2)
MH Undercarriage - 4 Welded Outriggers (2)
Front and Rear Outriggers (2)
Rear - Dozer, Front Outriggers (1)
MH Push Blade
Rear - Dozer Only (1)
MH Undercarriage - 4 Welded Outriggers, Push Blade (3)
Front and Rear Outriggers (3)


Maximum Travel Speed
Creeper Speed - 1st Gear
Forward/Reverse - 2nd Gear
Drawbar Pull
Forward/Reverse - 1st Gear
Creeper Speed - 2nd Gear
Maximum Gradeability

Hydraulic System

Heavy Lift
Travel Circuit
High Pressure (1)
Medium Pressure (1)
Swing Mechanism (1)
Implement/Travel Circuit
High Pressure (2)
Medium Pressure (2)
Swing Mechanism (2)

Swing Mechanism

Swing Torque
Swing Speed

Service Refill Capacities

Cooling System
8.7gal (US)
Engine Crankcase - With Filter
4gal (US)
Final Drive - Each
0.66gal (US)
Hydraulic System - Including Tank
88gal (US)
Hydraulic Tank
58gal (US)
Front Steering Axle
3gal (US)
Powershift Transmission
0.66gal (US)
Rear Axle
3.8gal (US)
Fuel Tank
101gal (US)


Shipping Height - Cab Tipped
Shipping Width
Shipping Length
Tail Swing Radius
Counterweight Clearance
Wheel Base
Undercarriage Width


4.9 m (16' 1") MH Drop Nose Stick
2.9 m (9' 6") Digging Stick
2.5 m (8'3") Digging Stick
4.8 m (15' 8") MH Straight Stick
5.9 m (19' 4") MH Drop Nose Stick
2.2 m (7'3") Digging Stick


Outside of Tire
Ground Clearance
Oscillation Axle Angle
± 6°
End of One-Piece Boom
End of VA Boom
Maximum Steering Angle


Interior Sound
72 db(A)
Exterior Sound
103 db(A)


SAE J1026 APR 90
ISO 10262

Operating Specifications

Maximum Reach


Powerful Performance

The Cat C6.6 with ACERT™ Technology introduces a series of evolutionary, incremental improvements that provide breakthrough engine performance. The building blocks of ACERT Technology are fuel delivery, air management and electronic control. ACERT Technology optimizes engine performance while meeting U.S. EPA Tier 3 engine emission regulations. The Cat C6.6 engine in the M322D MH delivers a maximum gross power of 129 kW (173 hp) at a rated speed of 2000 rpm. This is 2% more horsepower as compared to the 3056E in the M322C MH.

Low Fuel Consumption

The C6.6 is electronically controlled and uses the new Cat Common Rail Fuel System and fuel pump. This combination provides outstanding fuel consumption during both production and travel. When the system recognizes roading application the engine adjusts to the most efficient system operating point to save fuel without compromising road performance.

Low Noise, Low Vibration

The Cat C6.6 design improves operator comfort by reducing sound and vibration.

Cooling System

An electronically controlled, hydraulic motor drives a variable speed on-demand fan for engine coolant and hydraulic oil. The optimum fan speed is determined based on coolant and hydraulic oil temperature resulting in reduced fuel consumption and lower sound levels. The electronic engine control continuously compensates for the varying fan load, providing consistent net power, regardless of operating conditions.

One-Touch Low Idle Control

The two-stage, one-touch Automatic Engine Speed Control reduces engine speed if no operation is performed, maximizing fuel efficiency and reducing sound levels.

Waste Handling Package

The Waste Handling Package has been specifically developed for Cat Wheel Excavators working in waste transfer stations or other extremely dusty applications. This option features the following:

  • An automatic, hydraulic reversible fan that reverses airflow after a set interval, manually adjustable between 2 and 60 minutes with a switch located inside the cab.
  • A special dense wire mesh cooling system hood further reduces radiator clogging.
  • Two cyclone filters provide clean filtered air to the engine compartment, air cleaner, aftercooler and air conditioner condenser.


Improved Implement Speed

Due to new spools and increased horsepower, the M322D MH is able to offer even faster stick and swing speeds, leading to more productivity.

Dedicated Swing Pump

A dedicated variable displacement piston pump and fixed displacement piston motor power the swing mechanism. This closed hydraulic circuit maximizes swing performance without reducing power to the other hydraulic functions, resulting in smoother combined movements.

Heavy Lift Mode

This mode maximizes lifting performance by boosting the lifting capability of the material handler by 7 percent. Heavy loads can be easily moved in the full working range of the machine, maintaining excellent stability and speed.

Adjustable Hydraulic Sensitivity

This function allows the operator to adjust the aggressiveness of the machine according to the application. For precision work, one of four different levels of aggressiveness can be pre-selected.

Proportional Auxiliary Hydraulics

Versatility of the hydraulic system can be expanded to utilize a wide variety of hydraulic work tools using multiple valve options.

  • The Multi-Combined Valve is the core of the Tool Control System, allowing the operator to select up to ten pre-programmed work tools from the monitor. These preset hydraulic parameters support either one-way or two-way flow. The joystick sliding switches allow modulated control of the work tool.
  • The Medium Pressure Function Valve provides proportional flow that is ideal for rotating tools.
  • A new feature for the D-Series Material Handlers is the optional second High Pressure Valve. In combination with the Multi-Combined Valve, it provides the possibility to operate the machine with work tools or in applications requiring a third auxiliary hydraulic function, such as a tilting/rotating quick coupler.
Stick Regeneration Circuit

The stick regeneration circuit increases efficiency and helps increase controllability for higher productivity and lower operating costs.

Hydraulic Snubbers

Caterpillar integrates its cylinder snubber technology into all Wheel Excavator boom, stick and bucket cylinders. These snubbers help cushion shocks, reduce sound and increase cylinder life.

Caterpillar® XT™ 6 ES Hoses

Premium quality rubber, precision 4-ply wire reinforcement and exclusive reusable couplings are all unique features that deliver top performance and long life.

Operator Comfort

Interior Operator Station

Improved visibility and ergonomics are some of the many new features of the D-Series Wheel Excavators. The pressurized operator station provides maximum space and is designed for simplicity and functionality. Frequently used switches are centralized and are situated on the right-hand switch console. The left-hand seat console controls dozer blade and/or outriggers, and is tiltable for easy access to the cab. The fully automatic climate control adjusts temperature and air flow for exceptional operator comfort. Other comfort features include a cigar lighter, ashtray, drink/bottle holder, magazine rack and integrated mobile phone holder.

Cab Construction

The exterior design uses thick steel tubing along the bottom perimeter of the cab, improving the resistance to fatigue and vibration. This design allows the falling object guards to be bolted directly to the cab. The cab shell is attached to the frame with rubber mounts that limit vibration and sound transmitted from the frame, substantially reducing interior noise levels.

Viewing Area

To maximize visibility, all glass is affixed directly to the cab, eliminating the use of window frames. Choice of fixed or easy-to-open split front windshields meet operator preference and application conditions.

  • The fixed front windshield comes with high-impact resistant, laminated glass.
  • The 70/30 split front windshield opens with the upper portion able to be stored out of the way above the operator. The lower front windshield features a rounded design to maximize downward visibility and improves wiper coverage. This windshield option also features the one-touch action release system.
  • The roof of the cab provides an additional viewing pane by means of a skylight for added upward visibility. Direct sunlight is diverted with the retractable sunshield.

The new compact color monitor displays information in the local language that is easy to read and understand. Functions include the following:

  • Five programmable “quick access” buttons for one-touch selection of favorite functions.
  • Filter and oil change warnings displayed when the number of hours reaches the maintenance interval.
  • Tool select functionality, allowing the operator to select up to ten pre-defined hydraulic work tools.
  • Travel motor retarder selection to choose between three levels of aggressiveness in braking once the travel pedal is released.
  • Rear camera viewing capabilities from the optional camera mounted on the counterweight.
New Deluxe Seat

The new optional deluxe seat, equipped with an Active Seat Climate System, improves operator comfort. Cooled air flows through the seat cushions to reduce body perspiration. On cold days, a two-step seat heater keeps the operator warm and comfortable. The fully adjustable seat with adjustable lumbar support automatically takes into consideration the driver's weight, providing a more relaxed environment within the cab.

Heated Mirrors

Heated mirrors provide increased visibility in cold operating conditions as well as offering further safety considerations for those working around the machine.


The parallel wiper system maximizes visibility in poor weather conditions. The wiper virtually covers the entire front windshield, cleaning the operator's immediate line of sight.

Lunch Box

A large, cooled storage compartment is located behind the operator's seat. The compartment provides sufficient room to store items such as a lunch box. An optional cover secures the contents during machine operation.

Foot Pedals

Two-way pedals for travel and auxiliary circuits provide increased floor space, reducing the need to change positions. The foot pedal for auxiliary high-pressure circuit can be locked in the off position and used as a footrest for greater operator comfort.

Elevated Cab

Hydraulic Cab Riser

The Hydraulic Cab Riser (HCR) design provides the most suitable solution when high flexibility in cab height is needed. Main features of the hydraulic riser include the following:

  • Stability - The lift arms on the HCR are a wide and deep box-sectioned design with improved top and bottom links for greater cab stability. Further stability is achieved with the help of the retractable hydraulic cylinders used to raise the cab.
  • Speed - Two heavy-duty hydraulic cylinders provide quicker and more controlled up and down travel than seen in the C-Series.
  • Comfort - The parallelogram design of the linkage allows the cab to remain level at all ranges of motion. HCR movement is also slowed as the cab reaches the end of the riser stroke, eliminating the effects of a sudden start/stop.
  • Safety - In the event of a hydraulic malfunction, the cab can be lowered using either a lever inside the cab or one on the frame at ground level.
Fixed Cab Riser

The fixed cab riser offers a very stable and comfortable method to raise the cab by 1200 mm (47 in) to offer better viewing around the machine. Well, positioned steps lead up to the cab from the ground level. When shipping, the cab is unmounted to meet national road regulations. This option is only available for the M322D MH.

Bottom Position

The bottom position is used for shipping and travel, allowing for safer transporting

Top Position

The top position raises the cab by 2400 mm (94.5 in). This provides optimal viewing for all material handling jobs.


Undercarriage Options

Effective hydraulic line routing, transmission protection and heavy-duty axles make Caterpillar's undercarriages perfect for material handler applications. The D-Series M322D MH comes with the option of three different undercarriages in order to provide the greatest stability while performing your material handler jobs.

  • Material Handling - A new, standard design for the D-Series, the Material Handling Undercarriage with four welded outriggers is ideal for the extra stability needed, especially when using a Hydraulic Cab Riser.
  • Material Handling with Dozer Blade - An optional expansion to the Material Handling Undercarriage described above with an additional Dozer Blade mounted ahead of the front stabilizers to be used to push material commonly encountered in waste and mill yard applications.
  • Pin-On/Bolt-On - An optional undercarriage, the pin-on/bolt-on option allows for different kinds of stabilizers to be attached to the front and rear of the machine.
Heavy-Duty Axles

The front axle offers wide oscillating and steering angles. The transmission is mounted directly on the rear axle for protection and optimum ground clearance.

Advanced Disc Brake System

The disc brake system acts directly on the hub instead of the drive shaft to avoid planetary gear backlash. This solution eliminates the rocking effect associated with working free on wheels.

Drive Line Concept

The M322D MH Driveline design effectively utilizes the increases to engine torque and net power to provide a comfortable ride with improved smoothness, hydraulic retarding, and gear shifting commonly used during travel

Ground Clearance

A compact undercarriage design provides the M322D MH with optimum ground clearance during travel.

Adjustable Travel Alarm

An adjustable travel alarm is available to warn people when the machine is moving. Three settings can be selected through the monitor.

  • Auto mode - alarm will stop sounding immediately when the machine is no longer traveling, or has been sounding for an uninterrupted 10-second interval.
  • Off mode - Travel Alarm is disabled.

Booms and Sticks

MH Booms and Sticks

The MH booms have been redesigned to handle increased lifting capacities. The new stick range offers leading side plates to maximize the protection of hydraulic lines. The lines are fitted in between the two side plates offering protection from damage. Multiple boom and stick options allow you to pick the best match for your job

MH Booms

A specially designed MH boom is available to meet the functionality requirements demanded in material handling applications. The boom arrangements include high pressure hydraulic lines for opening and closing functionality and medium pressure lines for implement rotation.

MH Sticks

Three options of MH sticks are available for the M322D MH, all equipped with high and medium pressure auxiliary lines. The 4900 mm (193 in) Drop Nose Stick offers the reaching and lifting capabilities required for typical MH applications, while the 5900 mm (232 in) Long Drop Nose Stick is ideal when maximum reach is necessary. The 4800 mm Straight Stick is the best solution when additional work tool functionality is needed.

Special Applications

The M322D MH can be further outfitted with additional boom and stick options (see Optional Equipment), offering the ability to combine the material handler's hydraulic cab riser with traditional excavator functionality. This combination has been proven in transfer station, mining, and mill yard applications.


Tool Control

Ten hydraulic pump flow and pressure settings can be preset within the monitor, eliminating the need to adjust the hydraulics each time a tool is changed. Selecting the proper setting from the monitor menu instantly provides the operator with the correct amount of flow and pressure for the tool.

Orange Peel Grapple

The most common tool for material handling applications, this grapple is available in a range of sizes and provides a solution for a variety of material types. The grapple is free swinging and has unlimited left and right rotation.


The Multi-Grapple with unlimited left and right rotation is the ideal tool for stripping, sorting, handling and loading. For the best control in forward and backward grapple mobility, pair the Multi-Grapple with the MH Straight Stick and linkage.

Joystick Steering

The unique joystick steering option enables an operator to reposition the machine while traveling in first gear by the use of the slider switch on the right joystick. This enables the operator to keep both hands on the joysticks while simultaneously moving the implements and traveling. The operator can do more precise work faster with increased safety around the machine.

Ride Control

New for the D Series, the ride control system improves operator comfort and allows the machine to travel faster over rough terrain with improved ride quality for the operator. The ride control system features accumulators acting as shock absorbers to dampen the front part motion. Ride control can be activated through a button located on the soft switch panel in the cab.

Control Settings

Two selectable control settings are available to choose from in order to get the best power output from the engine and hydraulics as well as maintain optimum fuel efficiency.

  • Economy Mode - for precise material handling and loading with the added benefit of reduced fuel consumption.
  • Power Mode - for applications requiring fast volume loading and material casting.
Automatic Travel Mode

Automatically engaged when the travel pedal is depressed this mode provides maximum speed, draw bar pull and best in class fuel efficiency.

Product Link

Product Link, now standard, can assist with fleet management to keep track of hours, location, security and product health.

Machine Security

An optional Machine Security System is available from the factory. This system controls who can operate the machine when, and utilizes specific keys to prevent unauthorized machine use.

Complete Customer Support

Product Support

You will find nearly all parts requirements at your local Caterpillar dealer parts counter. Cat dealers utilize a world-wide network to find in-stock parts to minimize your downtime. To save money use genuine Cat Reman parts. You will receive the same warranty and reliability as new products at a substantial cost savings.


Make detailed comparisons of the machines you are considering before you buy. How long do components last? What is the cost of preventive maintenance? Your Cat dealer can give you precise answers to these questions and more to make sure you operate your machines at the lowest cost and most effectively.


Consider the financing options available as well as day-to-day operating costs. This is also the time to look at dealer services that can be included in the cost of the machine to yield lower equipment and owning and operating costs over the long run.


Improving operating techniques can boost your profits. Your Cat dealer has videotapes, literature and other ideas to help you increase productivity, and Caterpillar offers certified operator training classes to help maximize the return on your machine investment.


More and more equipment buyers are planning for effective maintenance before buying equipment. Choose from your dealer's wide range of maintenance services at the time you purchase your machine. Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as S•O•SSM Fluid Analysis and Technical Analysis help you avoid unscheduled repairs.


Repair, rebuild or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.

Service Capability

Whether in the dealer's fully equipped shop or in the field, you will get highly trained service technicians using the latest technology and tools.


Customer Service is critical today in every business. That's why so many people buy Cat equipment. They know they are getting quality, reliability and performance backed-up with the best Customer Service. Your Caterpillar dealer offers a wide range of services that can be set up under a Customer Support Agreement. The dealer will help you choose a plan that can cover the whole machine including work tools, to help you getting the best out of your investment.


Ground Level Maintenance

Caterpillar designed its D-Series Material Handlers with the operator and service technician in mind. Gull-wing doors, with pneumatically-assisted lift cylinders, effortlessly lift up to allow critical maintenance to be performed quickly and efficiently while maintaining operator safety.

Extended Service Intervals

The D-Series Material Handlers service and maintenance intervals have been extended to reduce machine service time, increase machine availability and reduce operating costs. Using S•O•SSM Scheduled Oil Sampling analysis, hydraulic oil change intervals can be extended up to 4,000 hours. Engine coolant change intervals are 12,000 hours with Cat Extended Life Coolant.

Self-Monitoring System with Auto-Diagnostics

The electronic engine and machine controllers provide detailed diagnostic capability for the service technicians. The ability to store active and intermittent indicators simplifies problem diagnosis and reduces total repair time, resulting in improved machine availability and lower operating cost.

Engine Inspection

The engine can be accessed from both ground level and the upper structure. The longitudinal layout ensures that all daily inspection items can be accessed easily.

Front Compartment

The front compartment hood can be opened vertically, providing outstanding ground level access to the batteries, air-to-air after cooler, air conditioner condenser and the air cleaner filter.

Easy to Clean Coolers

Flat fins on all coolers reduce clogging, making it easier to remove debris. The main cooling fan and air conditioner condenser are both hinged for easier cleaning.

Swing-out Air Conditioner Condenser

The Air Conditioning condenser swings out horizontally to allow complete cleaning on both sides as well as excellent access to the air-to-air after cooler.

Air Filter

Caterpillar air filters eliminate the use of service tools, reducing maintenance time. The air filter features a double-element construction with wall flow filtration in the main element and built-in mini-cyclone precleaners for superior cleaning efficiency. The air filters are constantly monitored for optimum performance. If airflow becomes restricted, a warning is displayed by the way of the in-cab monitor.

Capsule Filter

The hydraulic return filter, a capsule filter, prevents contaminants from entering the system when the hydraulic oil is changed

Fuel Filters

Cat high efficiency fuel filters with a Stay-Clean Valve™ features a special media that removes more than 98 percent of particles, increasing fuel injector life. Both the primary and secondary fuel filters are located in the engine compartment and can be easily changed from ground level.

New Auto-Lube System

The new Automatic Lubrication System provides the optimal amount of grease to all the main lubrication points. The configurable lubrication interval and system status messages can be accessed via the in-cab monitor.

Scheduled Oil Sampling

Caterpillar has specially developed S•O•SSM Oil Sampling Analysis to help ensure better performance, longer life and increased customer satisfaction. This thorough and reliable early warning system detects traces of metals, dirt and other contaminants in your engine, axle and hydraulic oil. It can predict potential trouble avoiding costly failures. Your Caterpillar dealer can give you results and specific recommendations shortly after receiving your sample.

Engine Oil

Caterpillar engine oil is formulated to optimize engine life and performance. The specially formulated oil is more cost effective and increases engine oil change interval to 500 hours, providing industry leading performance and savings.

Water Separator

The D Series is equipped with a primary fuel filter with water separator located in the engine compartment. For ease of service, the water separator can be easily accessed from ground level.

Fuel Tank Drain

The durable, corrosion-free tank has a remote drain located at the bottom of the upper frame to remove water and sediment. The tank drain with hose connection allows simple, spill-free fluid draining.

Remote Greasing Blocks

For those hard to reach locations, greasing blocks have been provided to reduce maintenance time. One block is located in the engine compartment with two grease points for the swing bearing and front-end attachment. For the undercarriage, two remote blocks provide easy access for greasing the oscillating axle and, as an option, the dozer blade.

New LED Rear Lights

Optional Light Emitting Diode (LED) Rear Lights replace the standard lights, for increased visibility on the job site, higher durability and longer life.

Handrails and Steps

Large handrails and steps assist the operator in climbing on and off the machine safely.

Storage Boxes

There are two storage toolboxes integrated in the steps of the undercarriage. The fixed cab riser option provides an additional storage location with one integrated into the upper structure steps.

Anti-Skid Plate

The Anti-Skid Plates cover the top of the steps and upper structure to help prevent slipping during maintenance. They reduce the accumulation of debris on the upper structure, improving the cleanliness and safety of the machine.

Environmentally Responsible Design

Fuel Efficiency

The D-Series Wheel Material Handlers are designed for outstanding performance with high fuel efficiency. This means more work done in a day, less fuel consumed and minimal impact on our environment.

Low Exhaust Emissions

The U.S. EPA Tier 3 compliant Cat C6.6 offers increased performance and reliability while reducing fuel consumption and exhaust emissions.

Quiet Operation

Operator and spectator noise levels are extremely low as a result of the new variable speed fan and remote cooling system.

Biodegradable Hydraulic Oil

The optional biodegradable hydraulic oil, HEES™, is formulated to provide excellent high-pressure and high-temperature characteristics, and is fully compatible with all hydraulic components. HEES is fully decomposed by soil and water microorganisms, providing a more environmentally-sound alternative to mineral-based oils.

Fewer Leaks and Spills

Lubricant fillers and drains are designed to minimize spills. Cat O-Ring Face Seals, Cat XT™ Hose and hydraulic cylinders are all designed to help prevent fluid leaks that can reduce the machine performance and cause harm to the environment.

Longer Service Intervals

Working closely with your Caterpillar Dealer can help extend service intervals for engine oil, hydraulic oil, axle oil and coolant. Meaning fewer required fluids and fewer disposals, all adding up to lower operating costs.

Standard Equipment:

Optional Equipment:

    Operator Station
    • Rearview camera
    • Seat
    • Falling objects guard
    • Seat headrest
    • Travel speed lock
    • Vandalism guard
    • Rain visor
    • Windshield
    • 73 mm (3") static seatbelt
    • Heated mirrors
    • AM/FM radio
    • Fixed Cab Riser, 1200 mm (47")
    • Rear LED lights
    • Rotating beacon
    Booms, Mh
    • MH 6.8 m (22' 4")
    Booms, Excavation
    • One piece excavation 5.7 m (18' 6")
    • VA excavation 5.4 m (17' 10")
    Sticks, Mh
    • Drop nose MH 4.9 m (16' 1")
    • Long Drop Nose MH 5.9 m (19' 4")
    • Straight MH 4.8 m (15' 8")
    Sticks, Excavation
    • Industrial 3.3 m (10'10")
    • 2.2 m (7'3")
    • 2.5 m (8'2")
    • 2.8 m (9'3")
    • Biodegradable hydraulic oil
    • MH undercarriage with four welded outriggers and front mounted blade
    • Standard bolt-on/pin-on undercarriage
    • Toolbox right side
    • Optional tires
    Other Equipment
    • Medium pressure auxiliary hydraulic circuit
    • High pressure auxiliary hydraulic circuit
    • 2nd High pressure auxiliary hydraulic circuit
    • Joystick steering
    • Machine security system
    • Custom paint