Use Less Fuel

Auto Engine Speed Control and Eco Mode lower your fuel bill without impacting your productivity.

Easy to Service

Reduce owning and operating costs with quick, easy-to-do maintenance.

More Versatility

Flexible machine configurations and a variety of attachments allow you to customize your machine to fit your needs.

Wheel Excavators M320

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Key Specs

Engine Power - ISO 14396:2002: 173 hp; 128.8 kW

Operating Weight Maximum: 42990 lb; 19500 kg

Maximum Travel Speed: 23 mile/h; 37 km/h

M320
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Overview

Comfortable, Quiet, Profitable Productivity

A quiet cab and efficient power systems mean happier operators and more profit from every task you throw at the Cat® M320 Wheeled Excavator. Built to take on the toughest conditions, the M320 offers optional configurations and attachments to handle most any job site need.

Benefits

Use Less Fuel

Auto Engine Speed Control and Eco Mode lower your fuel bill without impacting your productivity.

Easy to Service

Reduce owning and operating costs with quick, easy-to-do maintenance.

More Versatility

Flexible machine configurations and a variety of attachments allow you to customize your machine to fit your needs.

Features At A Glance

Cat® C7.1 engine meets EU Stage IIIA equivalent emission standards.
Engine fuel system designed to manage world-wide fuel quality and provide outstanding low fuel consumption during both working and traveling applications.
One-Touch Low Idle Control and Automatic Engine Speed Control reduce engine speed if no operation is performed, reducing fuel consumption and sound levels.
Three working modes: Power mode, Eco mode and Travel mode.
Constant Power Strategy, providing a quick response to changing loads, while delivering the same amount of power.
Choice of various booms and sticks provides the right balance of reach and digging forces for all applications.
Dedicated Swing Pump allows faster and smoother combined movements when using the implements while swinging.

Multiple configurations meet all your applications needs, with a choice of booms, sticks, blade and/or stabilizer undercarriages.
Highly mobile, the M320 can travel up to 37 km/h.
Standard one-way high pressure hydraulics allow customers to install attachments like hammers without adding other lines.
Ten hydraulic pump flow and pressure settings can be preset within the monitor allowing quicker and easier attachment (optional).
A lifting eye into the bucket linkage, the heavy lift mode and the overload warning signal allow operators to safely lift heavy loads.
Wide range of Cat attachments to handle any job at hand.

Operator Protective Guards (top and front guards) are available.
Ergonomically designed cab with controls kept to a minimum, conveniently located and easy to operate.
The optional air-suspension seat, with automatic weight adjustment and heated cushions enhance comfort and productivity.
Safety is enhanced by the all-round visibility provided by large glass areas and skylight and the standard rear-mounted camera image displayed on the full color monitor.
Low sound levels, as a result of the variable fan speed and remote cooling system enabling.

500 hours fuel filter replacement (reduced to 250 hours if fuel quality is sub-standard) allows reduced maintenance cost.
All daily maintenance points are accessible from ground level.
Clean design, with colored and numbered electrical wires, protected by thick braiding for ease of service.
Greasing points are centralized and kept to a minimum.
Cat XT™-6 ES hoses are resistant and durable, which reduces the risk of leaks that can decrease the performance of the machine.
Rigidity and long life with effective transmission protection and heavy duty axle.
Standard heavy duty batteries for improved cold start capability.

Cat technology solutions increase production and minimize operating costs. Link technologies wirelessly connect you to your job site, providing machine location, hours, fuel usage, idle time and event codes.

Specifications Standard Equipment Optional Equipment

Product Specifications for M320

Engine

Engine Power - ISO 14396:2002	173 hp 128.8 kW
Engine Model	Cat® C7.1 Cat® C7.1
Bore	4.1 in 105 mm
Displacement	427.8 in³ 7 l
Stroke	5.3 in 135 mm
Engine Emissions	Meets U.S. EPA Tier 3 and EU Stage IIIA emission standards. Meets U.S. EPA Tier 3 and EU Stage IIIA emission standards.
Note (1)	The M320 meets Tier 3 and Stage IIIA emission standards. Net power is tested per ISO 9249:2007. Standards in effect at the time of manufacture. Net power available at flywheel when the engine is equipped with fan, air cleaner, muffler, and alternator with engine speed at 2,000 rpm. The M320 meets Tier 3 and Stage IIIA emission standards. Net power is tested per ISO 9249:2007. Standards in effect at the time of manufacture. Net power available at flywheel when the engine is equipped with fan, air cleaner, muffler, and alternator with engine speed at 2,000 rpm.
Note (2)	No engine power derating required below 3,000 m (9,843 ft) altitude. No engine power derating required below 3,000 m (9,843 ft) altitude.
Note (3)	Recommended for use up to 3000 m (9,843 ft) altitude with engine power derate above 3000 m (9,840 ft). Recommended for use up to 3000 m (9,843 ft) altitude with engine power derate above 3000 m (9,840 ft).
Note (4)	Rated speed at 2,000 rpm. Rated speed at 2,000 rpm.

Hydraulic System

Main System - Maximum Flow - Implement	74 gal/min 280 kPa
Maximum Pressure - Equipment	5076 psi 35000 kPa
Maximum Pressure - Swing	4496 psi 31000 kPa
Maximum Pressure - Travel	5076 psi 35000 kPa

Swing Mechanism

Maximum Swing Torque	32116 ft·lbf 43.4 kN·m
Maximum Swing Speed	9.2 r/min 9.2 r/min

Machine Weight

Operating Weight Maximum	42990 lb 19500 kg
Operating Weight Minimum	41890 lb 19000 kg
Note (1)	Operating weight includes medium stick, 4000 kg counterweight, full fuel tank, operator, 245 kg quick coupler, 695 kg bucket and dual pneumatic tires. Weight varies depending on configuration. Operating weight includes medium stick, 4000 kg counterweight, full fuel tank, operator, 245 kg quick coupler, 695 kg bucket and dual pneumatic tires. Weight varies depending on configuration.

Service Refill Capacities

Cooling System	9.6 gal (US) 37 l
Final Drive	0.7 gal (US) 2.5 l
Fuel Tank	101.7 gal (US) 385 l
Hydraulic System - Including Tank	71 gal (US) 270 l
Hydraulic Tank	44.9 gal (US) 170 l

Dimensions

Boom	5350 mm (17'7") 5350 mm (17'7")
Bucket	GD 0.91 m³ (1.19 yd³) GD 0.91 m³ (1.19 yd³)
Stick	2.5 m (8'2") 2.5 m (8'2")
Counterweight Clearance	4.2 ft 1280 mm
Shipping Height - Top of Cab	10.8 ft 3300 mm
Shipping Length	29.4 ft 8960 mm
Tail Swing Radius	8.4 ft 2565 mm

Working Ranges and Forces

Boom Type	One-Piece Boom One-Piece Boom
Bucket	GD 0.91 m³ (1.19 yd³) GD 0.91 m³ (1.19 yd³)
Stick	2.5 m (8'2") 2.5 m (8'2")
Digging Height	29.3 ft 8940 mm
Dump Height	20.2 ft 6140 mm
Reach at Ground Level	30.5 ft 9295 mm
Vertical Wall Digging Depth	12.9 ft 3935 mm
Note (1)	Range values are calculated with a bucket (1200GD-CW30) (0.91 m3) with TIP GP-GEN DUTY (K80) and CW-30 quick coupler with a tip radius of 1535 mm (5'5"). Range values are calculated with a bucket (1200GD-CW30) (0.91 m3) with TIP GP-GEN DUTY (K80) and CW-30 quick coupler with a tip radius of 1535 mm (5'5").

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 0.85 kg of refrigerant which has a CO2 equivalent of 1.216 metric tonnes. The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 0.85 kg of refrigerant which has a CO2 equivalent of 1.216 metric tonnes.

Drive

Maximum Travel Speed

23 mile/h 37 km/h

M320 Standard Equipment

NOTE

Standard and optional equipment may vary. Consult your Cat dealer for details.

ELECTRICAL SYSTEM

Alternator, 75 A

Boom working light

Cab mounted working lights, front and rear

Roading and indicator lights, front and rear

Main shut-off switch

Maintenance free batteries

ENGINE

Cat® C7.1 Single Turbo diesel engine - meets U.S. EPA Tier 4 Final and EU Stage emission standards.

Power mode selector

Air filter/fuel filter

Automatic engine speed control

Automatic starting aid

Work up to 3000 m (9,842 ft) above sea level without engine power de-rating

Fuel/water separator with level indicator

Muffler

HYDRAULIC SYSTEM

Heavy lift mode

Separate dedicated swing pump

Stick regeneration circuit

Variable displacement, load sensing hydraulic system

Automatic swing brake

Capability to add auxiliary hydraulic circuits

Cat XT-6 ES hoses

Adjustable hydraulic sensitivity

Oil cooler

Anti-drift valve for bucket cylinder

Hydraulic mineral oil, Cat HYDO™ advanced 10 oil

Load sensing hydraulic system

SAFETY AND SECURITY

Camera mounted on counterweight

Mirrors, frame and cab

Travel alarm

Signal/warning horn

SERVICE AND MAINTENANCE

Sampling ports for Scheduled Oil Sampling (SOS)

Caterpillar Datalink and Electronic Technician capability

Door locks and cab locks with Caterpillar one-key security system

CAT TECHNOLOGIES

Cat Product Link™

UNDERCARRIAGE AND STRUCTURES

Creeper speed/ four wheel drive

Heavy-duty axles, advanced disc brake system and travel motor, adjustable braking force

Parking brake

Oscillating front axle, lockable, with remote greasing point

Full hydraulic steering with emergency capability

Steps with tool box in undercarriage (left and right)

Two-piece drive shaft

Two speed hydrostatic transmission

Counterweight (4000 KG-8818 lb)

M320 Optional Equipment

NOTE

Standard and optional equipment may vary. Consult your Cat dealer for details.

BOOM AND STICKS

One-Piece Boom

2.5 m (8'2'') stick

2.8 m (9'2'') stick

Bucket linkage with diverter valve

ELECTRICAL SYSTEM

Electrical refueling pump

SAFETY AND SECURITY

Rotating beacon on cab and chassis

UNDERCARRIAGE AND STRUCTURES

10.00-20 dual tires

10.00-20 dual pneumatic tires with road profile

Rear blade (parallel) / front outrigger undercarriage

Rear outrigger / front blade (parallel) undercarriage

Product Specifications for M320

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Engine

Engine Power - ISO 14396:2002	173 hp 128.8 kW
Engine Model	Cat® C7.1 Cat® C7.1
Bore	4.1 in 105 mm
Displacement	427.8 in³ 7 l
Stroke	5.3 in 135 mm
Engine Emissions	Meets U.S. EPA Tier 3 and EU Stage IIIA emission standards. Meets U.S. EPA Tier 3 and EU Stage IIIA emission standards.
Note (1)	The M320 meets Tier 3 and Stage IIIA emission standards. Net power is tested per ISO 9249:2007. Standards in effect at the time of manufacture. Net power available at flywheel when the engine is equipped with fan, air cleaner, muffler, and alternator with engine speed at 2,000 rpm. The M320 meets Tier 3 and Stage IIIA emission standards. Net power is tested per ISO 9249:2007. Standards in effect at the time of manufacture. Net power available at flywheel when the engine is equipped with fan, air cleaner, muffler, and alternator with engine speed at 2,000 rpm.
Note (2)	No engine power derating required below 3,000 m (9,843 ft) altitude. No engine power derating required below 3,000 m (9,843 ft) altitude.
Note (3)	Recommended for use up to 3000 m (9,843 ft) altitude with engine power derate above 3000 m (9,840 ft). Recommended for use up to 3000 m (9,843 ft) altitude with engine power derate above 3000 m (9,840 ft).
Note (4)	Rated speed at 2,000 rpm. Rated speed at 2,000 rpm.

Hydraulic System

Main System - Maximum Flow - Implement	74 gal/min 280 kPa
Maximum Pressure - Equipment	5076 psi 35000 kPa
Maximum Pressure - Swing	4496 psi 31000 kPa
Maximum Pressure - Travel	5076 psi 35000 kPa

Swing Mechanism

Maximum Swing Torque	32116 ft·lbf 43.4 kN·m
Maximum Swing Speed	9.2 r/min 9.2 r/min

Machine Weight

Operating Weight Maximum	42990 lb 19500 kg
Operating Weight Minimum	41890 lb 19000 kg
Note (1)	Operating weight includes medium stick, 4000 kg counterweight, full fuel tank, operator, 245 kg quick coupler, 695 kg bucket and dual pneumatic tires. Weight varies depending on configuration. Operating weight includes medium stick, 4000 kg counterweight, full fuel tank, operator, 245 kg quick coupler, 695 kg bucket and dual pneumatic tires. Weight varies depending on configuration.

Service Refill Capacities

Cooling System	9.6 gal (US) 37 l
Final Drive	0.7 gal (US) 2.5 l
Fuel Tank	101.7 gal (US) 385 l
Hydraulic System - Including Tank	71 gal (US) 270 l
Hydraulic Tank	44.9 gal (US) 170 l

Dimensions

Boom	5350 mm (17'7") 5350 mm (17'7")
Bucket	GD 0.91 m³ (1.19 yd³) GD 0.91 m³ (1.19 yd³)
Stick	2.5 m (8'2") 2.5 m (8'2")
Counterweight Clearance	4.2 ft 1280 mm
Shipping Height - Top of Cab	10.8 ft 3300 mm
Shipping Length	29.4 ft 8960 mm
Tail Swing Radius	8.4 ft 2565 mm

Working Ranges and Forces

Boom Type	One-Piece Boom One-Piece Boom
Bucket	GD 0.91 m³ (1.19 yd³) GD 0.91 m³ (1.19 yd³)
Stick	2.5 m (8'2") 2.5 m (8'2")
Digging Height	29.3 ft 8940 mm
Dump Height	20.2 ft 6140 mm
Reach at Ground Level	30.5 ft 9295 mm
Vertical Wall Digging Depth	12.9 ft 3935 mm
Note (1)	Range values are calculated with a bucket (1200GD-CW30) (0.91 m3) with TIP GP-GEN DUTY (K80) and CW-30 quick coupler with a tip radius of 1535 mm (5'5"). Range values are calculated with a bucket (1200GD-CW30) (0.91 m3) with TIP GP-GEN DUTY (K80) and CW-30 quick coupler with a tip radius of 1535 mm (5'5").

Air Conditioning System

Note

Drive

Maximum Travel Speed

23 mile/h 37 km/h

M320 Standard Equipment

NOTE

Standard and optional equipment may vary. Consult your Cat dealer for details.

ELECTRICAL SYSTEM

Alternator, 75 A

Boom working light

Cab mounted working lights, front and rear

Roading and indicator lights, front and rear

Main shut-off switch

Maintenance free batteries

ENGINE

Cat® C7.1 Single Turbo diesel engine - meets U.S. EPA Tier 4 Final and EU Stage emission standards.

Power mode selector

Air filter/fuel filter

Automatic engine speed control

Automatic starting aid

Work up to 3000 m (9,842 ft) above sea level without engine power de-rating

Fuel/water separator with level indicator

Muffler

HYDRAULIC SYSTEM

Heavy lift mode

Separate dedicated swing pump

Stick regeneration circuit

Variable displacement, load sensing hydraulic system

Automatic swing brake

Capability to add auxiliary hydraulic circuits

Cat XT-6 ES hoses

Adjustable hydraulic sensitivity

Oil cooler

Anti-drift valve for bucket cylinder

Hydraulic mineral oil, Cat HYDO™ advanced 10 oil

Load sensing hydraulic system

SAFETY AND SECURITY

Camera mounted on counterweight

Mirrors, frame and cab

Travel alarm

Signal/warning horn

SERVICE AND MAINTENANCE

Sampling ports for Scheduled Oil Sampling (SOS)

Caterpillar Datalink and Electronic Technician capability

Door locks and cab locks with Caterpillar one-key security system

CAT TECHNOLOGIES

Cat Product Link™

UNDERCARRIAGE AND STRUCTURES

Creeper speed/ four wheel drive

Heavy-duty axles, advanced disc brake system and travel motor, adjustable braking force

Parking brake

Oscillating front axle, lockable, with remote greasing point

Full hydraulic steering with emergency capability

Steps with tool box in undercarriage (left and right)

Two-piece drive shaft

Two speed hydrostatic transmission

Counterweight (4000 KG-8818 lb)

M320 Optional Equipment

NOTE

Standard and optional equipment may vary. Consult your Cat dealer for details.

BOOM AND STICKS

One-Piece Boom

2.5 m (8'2'') stick

2.8 m (9'2'') stick

Bucket linkage with diverter valve

ELECTRICAL SYSTEM

Electrical refueling pump

SAFETY AND SECURITY

Rotating beacon on cab and chassis

UNDERCARRIAGE AND STRUCTURES

10.00-20 dual tires

10.00-20 dual pneumatic tires with road profile

Rear blade (parallel) / front outrigger undercarriage

Rear outrigger / front blade (parallel) undercarriage

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