KEY SPECS

Engine Power - ISO 14396 129kW174hp
Engine Power - ISO 14396 (DIN) 176hp (metric)176hp (metric)
Engine Model Cat® C4.4

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BENEFITS

FEATURES AT A GLANCE

Do More with Less Fuel

The Cat C4.4 engine meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA.
The M320 is fuel efficient to help keep you moving and productive on the jobsite.
Easily travel between sites with travel speeds up to 35 km/h (22 mph).
Automatic Engine Speed Control helps reduce fuel consumption as it lowers engine speed when no operation is performed.
The advanced hydraulic system provides the optimum balance of power and efficiency while providing the control needed for precise digging requirements.
Auxiliary hydraulic options give you the versatility to use a wide range of Cat attachments.
Don't let the temperature stop you from working. The wheel excavator has a standard high-ambient temperature capability of 52°C (125°F) and cold start capability of -18°C (0°F).

Not all features are available in all regions. Please check with your Cat dealer for specific offering availability in your area. Build Number: 05D

Low Maintenance Costs

Up to 17% lower maintenance costs to help reduce downtime, while maximizing productivity and profitability.³
Quickly check and service your machine with daily maintenance points accessible from ground level.
The hydraulic oil filter helps provide high filtration performance, anti-drain valves to help keep oil clean when the filter is replaced, and long life with a 2,000-hour replacement interval.
Long greasing intervals and grouped grease points mean less downtime and more work getting done.
Scheduled Oil Sampling (S•O•S^SM) ports are located at ground level, helping simplify maintenance, and allowing for quick, easy extraction of fluid samples for analysis.
Built on a long legacy of high performance and highly reliable wheel excavators, our machine components are designed and manufactured to Caterpillar quality standards.
Parts commonality with the 320 excavator to help simplify maintenance and reduce downtime.
Attachments commonality with the 320 excavator to help enhance efficiency and provide convenience with interchangeable tools.

³Maintenance costs based on comparison of M320 (04B) and M320 (05D) recommended maintenance interval schedule and recommended component rebuild schedule.

Work in Comfort

Ergonomically designed cab with controls kept to a minimum, conveniently located and easy to operate.
Rollover Protective Structure (ROPS) cab structure and Operator Protective Guards (top and front guards) are available.
Get in and out of the cab easily using the tilt-up left console and straight access from the ground.
Conveniently located storage for lunch box, documents, and mobile phones helping to keep the operator comfortable during the work day.
Optional Bluetooth^® radio allows for seamless mobile phone connection to listen to music and podcasts and for hands-free calling.
Air conditioning controls are located on the machine display and can easily be adjusted to your ideal temperature with the touchscreen monitor.

Simple to Operate

Start up the machine easily with the push-to-start button.
Operate the wheel excavator comfortably with easy-to-reach and intuitive controls.
Two-way travel pedal is convenient and helps maximize productivity.
The machine has a long wheelbase undercarriage for stability and comfort to help provide smooth and controlled operation.
Up to 17% greater stability helps provide greater control and safety, allowing operators to move heavy loads more efficiently and confidently.⁴
To help reduce operator fatigue, the auto-axle lock will activate automatically when the travel pedal is in neutral and the machine speed is near zero.
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.

⁴Compared to M320 (04B). Estimated stability improvement based on lift chart data.

Safety Features

Easy and safe access to daily service points.
Standard LED lights give you a better view of your jobsite.
Enjoy great all-around visibility with the help of small cab pillars, large windows, and a flat engine hood design. Rear and right-side-view cameras are standard.
The service platform design provides easy, safe, and quick access to upper service platform; the service platform steps use anti-skid punch plate to prevent slipping.
Grease points are grouped conveniently for quick and easy prevention lubrication.
Use your PIN code on the monitor to enable the push button starting feature.
The in-cab swing lock prevents front linkage from moving as you travel.
Ground-level shutoff switch stops all fuel to the engine when activated and shuts down the machine.
Dedicated tie down points for safe truck transport.

Sustainability

The Cat C4.4 engine meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA.
Cat engines are compatible with diesel fuel blended with the following lower-carbon intensity fuels** up to: 100% 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.
Extended maintenance intervals not only reduce downtime but decrease the amount of fluid and filters that are replaced over the life of the machine.
Auto Engine Speed Control reduces fuel burn and greenhouse gas emissions by allowing the engine to automatically go into idle mode when the machine is not working.
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.

*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.

SPECIFICATIONS

Engine Power - ISO 14396 129kW174hp
Engine Power - ISO 14396 (DIN) 176hp (metric)176hp (metric)
Engine Model Cat® C4.4
Net Power - ISO 9249 128kW171hp
Net Power - ISO 9249 (DIN) 174hp (metric)174hp (metric)
Bore 105mm4in
Stroke 127mm5in
Displacement 4.4l269in³
Biodiesel Capability Up to B20¹
Emissions Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA.
Note (1) Net power advertised is the power available at the flywheel when engine is equipped with fan, air cleaner, Clean Emission Module (CEM) exhaust gas aftertreatment, alternator, and cooling fan running at intermediate speed. Rated speed 2,000 rpm. Advertised power is tested per the specified standard in effect at the time of manufacture.
Note (2) ¹Cat engines are compatible with diesel fuel blended with the following lower-carbon intensity fuels** up to: 100% 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. *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.
Maximum Travel Speed 35km/h22mile/h
Main System - Maximum Flow - Implement 429L/min113gpm
Maximum Pressure - Implement Circuit - Normal 35000kPa5080psi
Maximum Pressure - Implement Circuit - Heavy Lift 37000kPa5370psi
Maximum Pressure - Implement Circuit - Travel Circuit 35000kPa5080psi
Maximum Swing Speed 11r/min11r/min
Maximum Swing Torque 62kN·m45700lbf·ft
Operating Weight Maximum 21500kg47400lb
Operating Weight Minimum 20000kg44100lb
Note (1) Operating weight includes full fuel tank, operator, General Duty (GD) bucket and dual pneumatic tires. Weight varies depending on configuration. Typical configurations include 2.92 m (9'7") stick and 4000 kg (8,800 lb) counterweight.
Fuel Tank 338l89.3gal (US)
Cooling System 29l7.7gal (US)
Hydraulic Tank 151l39.9gal (US)
Hydraulic System - Including Tank 270l71.3gal (US)
Boom One-Piece Boom 5.7 m (18'7")
Stick 2.92 m (9'7")
Bucket General Duty (GD) 1.19 m³ (1.56 yd³)
Shipping Height - Top of Cab 3355mm11ft
Shipping Length 9600mm31.5ft
Support Point 2860mm9.4ft
Tail Swing Radius 2817mm9.2ft
Counterweight Clearance 1316mm4.3ft
Ground Clearance 325mm1.1ft
Undercarriage Length 5160mm16.9ft
Wheel Base 2800mm9.2ft
Boom One-Piece Boom 5.7 m (18'7")
Stick 2.92 m (9'7")
Bucket General Duty (GD) 1.19 m³ (1.56 yd³)
Digging Height 9740mm32ft
Dump Height 6780mm22.2ft
Maximum Digging Depth 6430mm21.1ft
Maximum Vertical Wall Digging Depth 5413mm17.8ft
Maximum Reach at Ground Line 9880mm32.4ft
Stick Forces (ISO) 102kN22931lbf
Bucket Forces (ISO) 120kN26977lbf
Note (1) All Dimensions are approximate. Values are with 10.00-20 Dual Pneumatic Tires.
Note The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1 kg (2.2 lb) of refrigerant, which has a CO2 equivalent of 1.216 metric tonnes (1.340 tons).