Technical Specifications
Benefits and Features
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Working hard has never been easier than with the Cat® M322 Wheeled Excavator. This machine is designed to help you take on a wide variety of challenges at a lower cost. The Cat M322 plays its part in optimizing the operator’s efficiency to increase cash flow. Enjoy the versatility, precision, and efficiency offered by integrated solutions like Cat Grade and Payload technologies. Combined with simplified maintenance, the M322 keeps you working quickly and easily.

Engine Power - ISO 14396 174 HP
Engine Power - ISO 14396 (DIN) 176 hp (metric)
Engine Model C 7.1
Net Power - ISO 9249 171 HP
Net Power - ISO 9249 (DIN) 174 hp (metric)
Bore 4.1 in
Displacement 427.8 in²
Stroke 5.3 in
Biodiesel Capability Up to B20¹
Emissions Meets U.S. EPA Tier 4 Final, EU Stage V, Japan 2014 emission standards.
Note (1) Net power advertised is the power available at the flywheel when the engine is equipped with fan, air cleaner, CEM exhaust gas aftertreatment, alternator, and cooling fan with engine speed at 2,200 rpm. Advertised power is tested per the specified standar
Note (2) ¹Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels** up to: 20% biodiesel FAME (fatty acid methyl ester)* or 100% renewable diesel, HVO
Machine Weight
Operating Weight Maximum 52911 lb
Operating Weight Minimum 44750 lb
Forward/Reverse - 2nd Gear 18.6 mile/h
Forward/Reverse - 1st Gear 5.6 mile/h
Creeper Speed - 1st Gear 3.4 mile/h
Creeper Speed - 2nd Gear 9.3 mile/h
Drawbar Pull 28551 lbf
Maximum Gradeability 70%
Hydraulic System
Main System - Maximum Flow - Implement 95 gal/min
Maximum Pressure - Implement Circuit - Heavy Lift 5366 psi
Maximum Pressure - Implement Circuit - Travel Circuit 5076 psi
Maximum Pressure - Implement Circuit - Normal 5076 psi
Swing Mechanism
Swing Torque 44250 lb/ft
Service Refill Capacities
Fuel Tank 124.2 gal (US)
Diesel Exhaust Fluid (DEF) 7.9 gal (US)
Cooling System 10.6 gal (US)
Engine Oil 3.4 gal (US)
Hydraulic Tank 52.8 gal (US)
Hydraulic System - Including Tank 71.3 gal (US)
Boom VA 5.4m (17'10")
Stick 2.9m (9'2")
Shipping Height with Falling Object Guard 11 ft
Support Point 11.3 ft
Shipping Length 31.1 ft
Tail Swing Radius 9.2 ft
Counterweight Clearance 4.3 ft
Ground Clearance 1.25 ft
Wheel Base 9 ft
Working Ranges and Forces
Boom Type VA 5.4m (17'10")
Stick 2.9m (9'2")
Bucket GD 1.2 m³ (1.7 yd³)
Maximum Loading Height 24.7 ft
Maximum Digging Depth 21.8 ft
Reach at Ground Level 33.4 ft
Vertical Wall Digging Depth 17.3 ft
Bucket Forces (ISO) 33946 lbf
Stick Forces (ISO) 23605 lbf
Maximum Depth Cut for 2440 mm (8 ft) Level Bottom 21.6 ft
working Ranges and Forces
Cutting Height 35.8 ft
Air Conditioning System
Note The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.0 kg of refrigerant which has a CO2 equivalent of 1.43 metric tonnes.



  • Cab Monitor Improvements

  1. Continuously improved user interface allows for intuitive navigation, minimizing performance interruption with the easy-to-use touchscreen menu.

  3. Identify apps quickly with a grid list view, abbreviated app names, and categorized menu options.

  5. A new notification center keeps important information visible to the operator, and displays messages without shrinking the camera view. 

  7. Color coded notifications set critical messages apart from the rest.

  9. Use the in-monitor QR code to learn about machine and technology features through a full suite of “how-to” videos.

  • Enhance visibility to make service work easier and safer with optional inspection lighting.

  • Standard integrated vehicle health management system alerts the operator with service guidance and parts needed to enhance uptime.   

Not all features are available in all regions. Please check with your local Cat dealer for specific offering availability in your area.
Build Number: 07D

Job Matched Performance


  • The Cat C7.1 engine matches your performance and production needs.

  • Up to 5 percent lower fuel consumption compared to M322F.

  • Built-in fuel savers like Auto Engine Speed Control and Engine Idle Shutdown eliminate waste.

  • Dedicated swing pump allows faster, smoother combined movements.

  • Auxiliary hydraulic options give you the versatility to use a wide range of Cat attachments.

Unmatched Versatility


  • Travel easily between jobsites with travel speeds up to 30 km/h (19 mph).

  • Joystick buttons/sliders can be set up as desired by the operator.

  • Enhanced swing lock makes it possible to lock swing and front linkage independently.

  • Don't let the temperature stop you from working. The excavator has a standard high-ambient temperature capability of 52°C (125°F) and cold start capability of -18°C (0°F).

Easy Operation


  • Start the engine with the push-to-start button, a Bluetooth key fob, or the unique Operator ID function.

  • Everything can be adjusted in the cab from the steering column height to the electrically adjustable mirrors.

  • Large split-screen monitor to allow quick view of multiple cameras on the same display.

  • Program your power mode and joystick preferences using Operator ID; the excavator remembers your settings each time you go to work.

  • Navigate quickly on the standard high-resolution 254 mm (10 inch) touchscreen monitor or with the aid of the jog dial control.

  • The axle locks at zero speed and unlocks when the travel pedal is activated. The axle can also be manually locked with a button on the right-hand console.

  • Tiltrotator attachments--ours or other brands--work seamlessly with Cat 2D Grade, Assist, Payload, and E-Fence . With no additional hardware required, all you have to do is simply select "Third Party Tiltrotator System Installation" in the monitor, do the calibration, and get to work.

  • Cat continues to improve user interface functionality for operators of all skill levels. The touchscreen monitor is an easy-to-use operating tool that presents the jobsite dashboard with an intuitive format. Productivity applications are displayed in grid-view to read on-the-go, and touchscreen navigation is programmed to make sure job performance continues without any hold ups.



  • The service platform design provides easy, safe, and quick access to the cab; the steps use an anti-skid punch plate to prevent slipping.

  • Operator works in clean air thanks to the cabin filtration system that includes precleaner, a recirculation filter, and a cabin pressure monitor.

  • Keep your excavator secure with Operator ID. Use your PIN code on the monitor to enable the pushbutton starting feature.

  • For a clearer view of the jobsite, whether during the day or in the dark, the M322 has large glass areas, rear/side cameras, and LED lamps for all working lights.

  • Make service work easier and safer with optional inspection lighting. With the flip of a switch, lights will illuminate the engine, pump, battery, and radiator compartments to enhance visibility.

Simplified Machine Maintenance


  • Quickly check and service your machine with all daily maintenance points accessible from ground level.

  • Up to 5 percent lower maintenance costs vs. previous model with the same productivity.

  • Track your machine's filter life and maintenance intervals on the in-cab monitor.

  • The hydraulic oil filter provides improved filtration performance, anti-drain valves to keep oil clean when the filter is replaced, and longer life with a 3,000-hour replacement interval - 50 percent longer than previous filter designs.

  • S-O-S ports are located at ground level, simplifying maintenance and allowing for quick, easy extraction of fluid samples for analysis.

  • Boost productivity with proactive service reminders. The Integrated vehicle health management system alerts the operator with step-by-step service guidance along with parts needed so you don't experience any unnecessary downtime.

Elevate Business with Cat Technology


  • Boost productivity versus traditional grading with optional Cat Grade with 2D system.

  • Optional Cat Payload helps you achieve precise load targets to improve your operating efficiency. Pick up a load of material--with a bucket and thumb combination or grapple and clamshell attachments--and get a real-time weight estimate without swinging.

  • Combine Payload with VisionLink® and remotely manage your production targets or take payload data with you. 

  • Upgrade to our dual antenna GNSS for maximum grading efficiency. The system lets you create and edit designs on the touchscreen monitor while you’re on the job, or you can have the plan design sent to the excavator to make your work easier. Plus, you get added benefits of avoidance zones, cut and fill mapping, lane guidance, and augmented reality along with advanced positioning capability.

  • Optional Grade Assist helps you stay on grade – simply and effortlessly – with single-lever digging. Set your desired bucket angle and let Bucket Assist automatically maintain the angle in sloping, leveling, fine grading, and trenching applications

  • Optional 2D E-fence is integrated right out of the factory to prevent the excavator from moving outside operator defined set points.

  • All Cat Grade systems are compatible with radios and base stations from Trimble, Topcon, and Leica. Already invested in a grade infrastructure? You can install grade systems from Trimble, Topcon, and Leica onto the machine.



  • The Cat® C7.1 engine meets U.S. EPA Tier 4 Final and EU Stage V

  • Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels** up to: 20% biodiesel FAME (fatty acid methyl ester)* or 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels.Refer to guidelines for successful application. Please consult your Cat dealer or "Caterpillar Machine Fluids Recommendations" (SEBU6250) for details.

  • Cat Grade technologies combine advanced guidance with optional automated machine control helping you reach grading targets while reducing fuel burn and greenhouse gas emissions by improving efficiency, job site productivity, and accuracy.

  • Auto Engine Speed Control reduces unnecessary fuel burn and greenhouse gas emissions by allowing the engine to automatically go into idle mode when the machine is not working.

  • Cat® Payload for excavators provides on-the-go material weighing which helps reduce fuel burn by improving loading efficiency, job site productivity, and eliminating trips to the scale.

  • Extended maintenance intervals not only reduce downtime but decrease the amount of fluid and filters that are replaced over the life of the machine.

  • Cat Scheduled Oil Sampling (S•O•S℠) Services helps reveal excessive wear, contaminated fluids or other “unseen” issues that can shorten component life. In many cases, you can extend oil and coolant change intervals by using fluid monitoring. Consult your Cat dealer or the machine's operation and maintenance manual for more information.

  • Don't waste fuel idling. Cat VisionLink® online fleet monitoring helps you manage idle time and reduce fuel burn and greenhouse gas emissions. VisionLink® displays the CO2 emissions for monitored assets, calculated by fuel type for the Runtime Fuel Burned each day in a selected date range.

  • Remote Flash minimizes downtime and maintenance time while keeping your asset running with maximum efficiency. Alerts for machine updates are sent virtually from your Cat dealer and updates can be deployed without a dealer technician needing to be onsite. Remote Troubleshoot decreases maintenance time and keeps your machine running with maximum efficiency by allowing your Cat dealer to virtually test the machine while working. Once a problem is identified, a technician can fix it the first time, saving time and money.

*Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel (for use of  blends higher than 20% biodiesel, consult your Cat dealer).**Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels.

Standard Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Cab
    • ROPS, advanced sound suppression
    • Premium cab with auto-adjustable seat and air ventilation
    • High-resolution 254 mm (10 in) LCD touchscreen monitor
  • Boom And Sticks
    • 5.4 m (17'10") variable adjustable boom
  • Cat Technology
    • VisionLink
    • Remote Flash
    • Remote Troubleshoot
  • Electrical System
    • LED lights on chassis (left-hand, right-hand) and counterweight
    • Programmable time-delay LED working lights
    • Roading and indicator lights, front and rear
    • Maintenance-free batteries
    • Centralized electrical disconnect switch
  • Engine
    • Power mode selector
    • One-touch low idle with auto engine speed control
    • Auto engine idle shutdown
    • 52°C (125°F) high-ambient cooling capacity
    • Cold start capability-18°C (0°F)
    • Double element air filter with integrated precleaner
    • Electric fuel priming pump
    • On-demand electric cooling fans
  • Hydraulic System
    • Automatic swing brake
    • Auto hydraulic oil warm up
    • Electronic main control valve
    • Boom, stick, and bucket drift reduction valves
    • 1-slider joystick
    • Heavy lift mode
    • Separate dedicated swing pump
    • Boom, stick, and bucket drift reduction valves
  • Safety And Security
    • Rear- and right-side-view cameras
    • Ground-level engine shutoff switch
    • Anti-skid plate and countersunk bolts on service platform
  • Service And Maintenance
    • Sampling ports for Scheduled Oil Sampling (S·O·S)
    • Integrated vehicle health management system
  • Undercarriage And Structures
    • 11.00-20 16 PR, dual tires
    • Automatic brake/axle lock
    • Creeper speed
    • All wheel drive

Optional Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Boom And Sticks
    • 2.5 m (8'2") stick
    • 2.9 m (9'6") stick
  • Cat Technology
    • Cat Grade Connectivity
    • Cat Grade 2D
    • Cat Grade with Attachment Ready Option (ARO)
    • Cat Grade 3D dual GNSS
    • Laser catcher
    • Grade Assist
    • Cat Payload
    • Cat Tilt Rotator (TRS) Integration
  • Electrical System
    • Electrical refueling pump
  • Hydraulic System
    • 2-slider joystick
    • Second high-pressure auxiliary circuit (one-/ two-way high-pressure flow)
    • Medium pressure auxiliary circuit (one-/ two-way medium-pressure flow)
    • Quick coupler circuit
    • SmartBoom
    • Ride control
    • Cat tiltrotator support
    • Joystick steering
    • Boom/stick lowering check valves
  • Safety And Security
    • 360° visibility
    • Cat asset tracker
    • Wide angle mirrors
    • Signaling/warning horn
    • 2D E-Fence
    • Inspection lighting
  • Service And Maintenance
    • Automatic lubrication system for implement and swing system
  • Undercarriage And Structures
    • 3500 kg (7,716 lb) counterweight
    • 4700 kg (10,362 lb) counterweight

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