Used Komatsu 128-8 Excavator

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Detailed Introduction to Komatsu PC128-8 Crawler Excavator

The Komatsu PC128-8 is a 13-ton class mid-sized crawler excavator developed by Japanese construction equipment manufacturer Komatsu Ltd., belonging to Komatsu's globally recognized PC-8 product line. It is designed to balance strong working performance, excellent fuel efficiency, high structural durability and operator comfort, making it one of the most popular models in the 12-14 ton excavator segment for both urban and rural construction scenarios.

1. Core General Specifications

Item	Parameter
Operating Weight	12,600 – 13,200 kg (varies with arm configuration, bucket type and counterweight option)
Standard Bucket Capacity	0.45 – 0.65 m³
Transport Length	7,640 mm
Transport Width	2,490 mm
Max. Digging Depth	5,520 mm (standard arm) / 6,210 mm (long arm option)
Max. Digging Reach	8,350 mm (standard arm) / 9,120 mm (long arm option)
Max. Dumping Height	6,200 mm
Travel Speed	3.2 / 5.5 km/h (low/high gear)
Swing Speed	11 rpm
Gradeability	70% (35°)

2. Powertrain System

The PC128-8 is equipped with a Komatsu proprietary SAA4D95LE-5 4-cylinder, 4-stroke, water-cooled, turbocharged, intercooled diesel engine, which meets EU Stage IIIA and US EPA Tier 3 emission standards:

Rated net power: 66 kW (90 HP) @ 2,200 rpm
Max. torque: 330 N·m @ 1,600 rpm
Fuel tank capacity: 247 L, supporting 8-10 hours of continuous operation under normal working conditions
Equipped with Komatsu EcoT3 energy-saving technology, including electronic high-pressure common rail fuel injection system, variable flow control, and automatic idle function. Operators can switch between Power (P) mode for heavy-duty tasks and Economy (E) mode for light-duty scenarios to reduce fuel consumption by up to 15% compared with previous generation models.

3. Hydraulic System

It adopts Komatsu's patented Closed-center Load Sensing System (CLSS), which ensures precise control and smooth coordinated movements of multiple actuators (boom, arm, bucket, swing) at the same time, greatly improving operation efficiency:

Main pump: 2 variable displacement piston pumps, total maximum flow rate of 220 L/min
Main relief valve pressure: 34.3 MPa
Equipped with independent hydraulic oil cooling system, avoiding overheating under long-time high-load operation
Optional breaker mode, which allows one-click adjustment of hydraulic flow and pressure to match different attachments such as hydraulic breakers, augers, and grapples
Hydraulic oil replacement interval reaches 5,000 hours, reducing maintenance costs.

4. Structural Durability

Komatsu applies strict durability design standards to the PC128-8 to adapt to harsh working conditions:

Boom, arm and bucket are made of high-tensile strength steel, with stress relief treatment after welding, greatly improving resistance to twisting and impact
X-type integrated chassis frame is welded with thickened steel plate, with anti-corrosion coating, suitable for muddy, rocky and other harsh working environments
Track system adopts floating seal design for carrier rollers, track rollers and idlers, effectively preventing dust and muddy water from entering, extending service life by 30% compared with ordinary designs
Optional rubber track pads to avoid damage to asphalt and cement pavement, suitable for municipal construction in urban areas.

5. Operator Comfort & Safety

The cab of PC128-8 is ROPS (Roll-over Protective Structure) and FOPS (Falling Object Protective Structure) certified, providing all-round safety protection for operators:

Spacious cab with multi-adjustable air-suspension seat, reducing vibration transmitted to the operator by more than 40%
Low-force pilot control joysticks, reducing operator fatigue during long-time operation
Full-color LCD monitor displays real-time working data including fuel consumption, water temperature, hydraulic oil temperature, and fault codes, with automatic early warning function for abnormal conditions
High-efficiency heating and cooling air conditioning system, with multiple air outlets, and humanized configurations such as USB charging port, radio and large storage space
Internal noise level is controlled below 75 dB(A), providing a quiet working environment
Standard safety configurations include travel alarm, reverse buzzer, emergency stop button, anti-slip steps and handrails for getting on and off the machine.

6. Maintenance & Cost Control

The PC128-8 is designed for easy maintenance, greatly reducing downtime:

All daily maintenance points are arranged at ground-accessible positions, no need to climb the upper frame for oil filter, fuel filter and air filter replacement
Standard Komatsu KOMTRAX remote monitoring system, which supports remote viewing of equipment location, working hours, fuel consumption and fault information, convenient for fleet management, anti-theft and preventive maintenance
Long maintenance intervals: engine oil replacement every 500 working hours, fuel fine filter replacement every 500 hours, air filter inner core replacement every 2,000 hours
Low overall failure rate and high residual value, reducing long-term operation cost for users.

7. Typical Application Scenarios

The PC128-8 is suitable for a wide range of light to medium-duty construction scenarios:

Municipal engineering: trench digging, pipeline laying, road repair, sidewalk construction
Landscaping: tree pit digging, terrain leveling, seedling transplantation
Building construction: small foundation excavation, material handling, muck cleaning
Demolition work: small building demolition, concrete crushing with hydraulic breaker
Agricultural and water conservancy projects: irrigation canal digging, farmland leveling, reservoir maintenance
Narrow space operation: its compact body and small turning radius make it very suitable for urban old town renovation and indoor construction sites.

Core Advantages Summary

The Komatsu PC128-8 is widely recognized by global users for its reliable performance, low operation cost and strong adaptability, making it an ideal choice for small and medium construction contractors who pursue a balance between work efficiency and investment return.

Non flooded

No accident

Original product

Used Komatsu 128-8 Excavator

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