Komatsu PC400 Excavator

The Komatsu PC400 gets its exceptional power and work capacity from a Komatsu PC500 engine. The output is 257 kW 345 HP, providing increased hydraulic power and fuel efficiency. The Komatsu PC400 engine is U.S. EPA Tier 2 and EU Stage 2 emissions equivalent. Komatsu PC400 engine adopts the electronically controlled Heavy-Duty High-Pressure Common Rail (HPCR) fuel injection system.

The PC400 excavator can work for up to 10 hours without refueling thanks to a Heavy Duty HPCR engine designed to handle harsh environmental conditions. This powerful machine can dig trenches, load cargo, and lift objects up to 20 feet. Plus, with a standard cab, it is easy to maneuver around tight spaces to get the job done quickly and efficiently every time.

Komatsu PC4000-11


HAWK Silenced breaker hammer


HAWK Clamshell Bucket

Non Rotating Clamshell Bucket

HAWK Clamshell Bucket

Rotating Clamshell Bucket

HAWK Mechanical grapple 20t

Mechanical Grapple

  • BMG400
HAWK Non rotating hydraulic grapple

Hydraulic Grapple

HAWK Hydraulic grapple 1

Rotary Hydraulic Grapple

  • HRHG400


Komatsu Large displacement high efficiency pump

Large displacement high efficiency pump

Large displacement hydraulic implement pumps provide high flow output at lower engine RPM, operation at the most efficient engine speed.

Komatsu Closed-center load-sensing hydraulic system

Closed-center load-sensing hydraulic system

Smooth operation, quick cycle times, great multi-function, while lowering fuel consumption from closed-center load-sensing hydraulic system.

Komatsu - Built for strength<br />

Komatsu PC400 Excavator is Built for strength

Equipment designed for long-term durability with high resistance to bending and torsional stress. Booms and arms are constructed with thick plates of high tensile strength streel and designed with large cross-sectional areas.

Komatsu - Cleaner emissions

Cleaner emissions

A heavy-duty aftertreatment system that combines a Komatsu Diesel Particulate Filter (KDPF) and selective catalytic reduction (SCR). The system injects the correct amount of diesel exhaust fluid at the proper rate, decomposing nitrogen oxide.

Komatsu - Easy access

Easy access

Engine oil check and filter locations integrated into one side to allow easier maintenance access.

Komatsu - Advanced ergonomic design

Advanced ergonomic design

Wide spacious cab includes a heated air suspension seat with reclining backrest. Seat height and position are easily adjusted using a pull-up lever. Armrest position easily adjusted with the console.

Komatsu - Information at your fingertips

Information at your fingertips

Updated, large, high-resolution LCD color monitor to ease accurate and smooth work. Key machine information displayed in user-friendly interface, rearview camera and DEF level gauge display added to default main screen.

Komatsu - Rollover protection

Rollover protection

A ROPS cab that conforms to ISO 12117-2 comes as standard equipment. It also satisfies requirements for level 1 operator protective guard (OPG) and top guard (ISO 10262).

Komatsu - Multi-operator productivity

Multi-operator productivity

An operator identification ID can be set up for each operator and used to manage operation information of individual machines using Komtrax data. Data can analyze operation status by operator and by machine.

Komatsu - Reduce fuel consumption

Reduce fuel consumption

Auto idle shutdown automatically shuts the engine down after idling for a set period to reduce unnecessary fuel consumption and exhaust emissions. Time before engine is shutdown can be programmed from 5 to 60 minutes.

Komatsu - Designed for durability

Designed for durability

Large heavy-duty revolving frame guards and swivel guard help protect vital components from damage and debris build-up.

Komatsu - Ease of maintenance and serviceability

Ease of maintenance and serviceability

Provide a convenient and more secure work area in front of the engine. A new step provides easier access for filling the AdBlue/DEF tank.


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Komatsu SAA6D125E-5
Water-cooled, 4-cycle, direct injection
Turbocharged, aftercooled
Number of cylinders
125 mm
150 mm
Piston displacement
11.04 L
SAE J1995
Gross 270 kW 362 HP
ISO 9249 / SAE J1349
Net 257 kW 345 HP
Rated rpm
1900 min-1
Fan drive method for radiator cooling
All-speed control, electronic
U.S. EPA Tier 3 and EU Stage 3A emissions certified.



Type: HydrauMind (Hydraulic Mechanical Intelligence New Design) system, closed-center system with load sensing valves and pressure compensated valves

Number of selectable working modes:
Main pump:
Pumps for
Boom, arm, bucket, swing, and travel circuits
Variable displacement piston type
Maximum flow
690 L/min
Supply for control circuit
Self-reducing valve
Hydraulic motors:
2 x axial piston motor with parking brake
1 x axial piston motor with swing holding brake
Relief valve setting:
Implement circuits
37.3 MPa 380 kg/cm2
Travel circuit
 37.3 MPa 380 kg/cm2
Swing circuit
27.9 MPa 285 kg/cm2
Pilot circuit
3.2 MPa 33 kg/cm2
Hydraulic cylinders:
Number of cylinders
Bore x Stroke x Rod Diameter
2–160 mm x 1570 mm x 110 mm
    Std except 2.4 m arm
1–185 mm x 1820 mm x 120 mm
                  for 2.4 m arm
1–185 mm x 1590 mm x 120 mm
1–185 mm x 1820 mm x 120 mm
1–160 mm x 1270 mm x 110 mm
 1–185 mm x 1160 mm x 120 mm



Steering control
Two levers with pedals
Drive method
Maximum drawbar pull
330 kN 33700 kg
70%, 35°
Maximum travel speed: (Auto-Shift)
5.5 km/h
4.0 km/h
3.0 km/h
Service brake
Hydraulic lock
Parking brake
Mechanical disc brake



Drive method
Hydrostatic motor
Swing reduction
Planetary gear
Swing circle lubrication
Service brake
Hydraulic lock
Holding brake/Swing lock
Mechanical disc brake
Swing speed
9.1 min-1



Center frame
Track frame
Seal of track
Sealed track
Track adjuster
Number of shoes
46 each side
Number of carrier rollers
2 each side
Number of track rollers
7 each side



Fuel tank
650 L
36.0 L
37.0 L
Final drive, each side
10.5 L
Swing drive
20.0 L
Hydraulic tank
248 L



Operating weight including 7060 mm one-piece boom, 3380 mm arm, ISO 7451 heaped 1.90 m3 backhoe bucket, rated capacity of lubricants, coolant, full fuel tank, operator, and standard equipment.

Frequently Asked Questions

What are the specifications of the Komatsu PC400 excavator?
The Komatsu PC400 excavator, also known as the 400 Komatsu excavator, is a robust, high-performance machine designed for heavy-duty excavation and construction tasks. Key specifications of the PC400 include fuel tank capacity is 650L, a maximum travel speed is 5.5 km/h, and lift objects up to 20 feet. Equipped with a 362-horsepower engine and advanced hydraulic systems, the PC400 excels in demanding work environments.

Can you recommend compatible attachments for the Komatsu PC400 excavator?
A wide range of attachments are compatible with the Komatsu PC400 excavator to enhance its versatility and productivity on the job site. Popular attachments include buckets, hydraulic breakers, thumbs, grapples, compactors, and rippers. These attachments are designed to perform various tasks such as excavation, material handling, demolition, and compaction. Our team can provide tailored recommendations based on your project requirements and the capabilities of your PC400 excavator.

How does the weight of the PC400 Komatsu excavator affect its performance and operation?
The weight of the PC400 Komatsu excavator, which typically ranges from 105,670 LBS to 110,220 LBS, plays a crucial role in its performance and operation. The machine’s weight affects stability, lifting capacity, and fuel efficiency. Operating the PC400 within its specified weight limits is essential to ensure safe and efficient operation on the job site. Our experts can guide you in maximizing the performance of your PC400 excavator while minimizing the risk of overloading or strain on the machine.

What maintenance is required for the Komatsu PC400 excavator?
Regular maintenance is essential for keeping the Komatsu PC400 excavator in optimal condition for reliable performance and longevity. Follow the manufacturer’s recommended maintenance schedule for tasks such as checking fluid levels, inspecting hydraulic components, greasing pivot points, and replacing filters and fluids as needed. Additionally, routine inspections should be conducted for signs of wear or damage, and any issues should be addressed promptly to prevent further damage or safety hazards.

Can I use third-party attachments with my Komatsu PC400 excavator?
While Komatsu offers a range of high-quality attachments designed explicitly for the PC400 excavator, third-party attachments may also be compatible. However, it’s crucial to ensure that third-party attachments meet safety standards and specifications outlined by Komatsu for use with the PC400. Our team can provide guidance on selecting reputable third-party attachments and verifying compatibility with your excavator to ensure safe and efficient operation.

How do I find more information about the specifications and capabilities of the Komatsu PC400 excavator?
For detailed information about the specifications and capabilities of the Komatsu PC400 excavator, refer to the manufacturer’s website or product brochure. You can also consult with our team of experts, who can provide additional insights and recommendations based on their extensive knowledge and experience with Komatsu excavators and attachments.