Used Komatsu 350-7 Excavator

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Komatsu PC350-7 Crawler Excavator Detailed Introduction

The Komatsu PC350-7 is a 35-ton class heavy-duty crawler excavator, developed by Komatsu Limited as part of its high-performance Dash-7 excavator product line. Designed for long-hour, high-intensity operation scenarios, it is widely recognized globally for outstanding reliability, fuel efficiency, precise controllability and low total cost of ownership, making it a preferred choice for medium-to-large construction, mining and earthmoving contractors.

1. Core Technical Specifications

Item	Parameter
Operating Weight	33,600 – 35,200 kg
Standard Bucket Capacity	1.4 – 1.9 m³ (customizable for rock, heavy-duty or lightweight buckets)
Rated Net Power	184 kW (247 HP) @ 1900 rpm
Max. Digging Depth (standard arm)	7,380 mm
Max. Digging Radius	11,100 mm
Max. Dumping Height	6,890 mm
Swing Speed	9.5 rpm
Travel Speed	3.2 km/h (low) / 5.5 km/h (high)
Gradeability	70% (35°)
Emission Standard	Tier 3 / Stage IIIA

2. Powertrain System

The PC350-7 is equipped with Komatsu’s independently developed SAA6D114E-3 6-cylinder water-cooled diesel engine, optimized for heavy load conditions:

Adopts high-pressure common rail fuel injection technology, variable geometry turbocharger (VGT) and intercooler, ensuring sufficient power output while reducing fuel consumption by 10-15% compared to previous generation models under the same workload.
Built-in two working modes: Power mode (P-mode) for high-efficiency heavy load operations such as rock digging and quarry loading, and Economy mode (E-mode) for light load scenarios to further cut fuel costs.
Equipped with auto-idle and auto-shutdown functions, which automatically reduce engine speed when the machine is idle, lowering noise and unnecessary fuel loss.
Optional cold-start package and high-temperature cooling package are available to adapt to operations in -30°C to 50°C extreme environments.

3. Hydraulic System

It uses Komatsu’s proprietary CLSS (Closed Center Load Sensing System) for industry-leading operation smoothness:

Pressure compensation valves are installed for each actuator, ensuring flow distribution is not affected by load changes, and composite actions (digging + swinging + lifting) are coordinated without lag.
Equipped with Power Boost function, which can increase hydraulic system pressure by 10% for 8.5 seconds temporarily, providing extra digging force for hard soil or rock breaking scenarios.
The travel hydraulic circuit is independently designed, so travel and working device actions do not interfere with each other, ensuring stable power output when climbing slopes with load.

4. Structural Durability Design

The PC350-7 is engineered to withstand harsh construction and mining conditions:

The boom, arm and bucket are made of high-tensile steel, with reinforced welding ribs at all stress concentration points, passing 10,000-hour fatigue test under extreme loads.
The integrated welded X-shaped undercarriage has strong torsion resistance, and the sealed and lubricated track system (track shoes, rollers, idlers) has a service life 30% longer than similar products of other brands.
The large-diameter swing bearing adopts double-sided sealing design, effectively preventing dust and impurities from entering, and extending maintenance intervals.

5. Operator Cabin & Comfort

The cabin meets international ROPS (Roll Over Protective Structure) and FOPS (Falling Object Protective Structure) safety standards:

The whole cabin is filled with sound-insulating materials, and the internal operating noise is controlled below 75 dB(A).
The air-suspension seat supports 8-direction adjustment, with lumbar support and adjustable armrests, reducing operator fatigue during long-hour work.
Short-stroke pilot control levers require low operating force, and the 7-inch LCD monitor displays real-time equipment status including fuel consumption, water temperature, hydraulic oil temperature and fault codes.
Standard automatic constant-temperature air conditioning, multiple storage compartments, cup holders and radio are configured to improve operating experience.

6. Maintenance & Operational Cost Control

All routine maintenance points (oil filter, fuel filter, air filter, hydraulic oil return filter) are arranged at ground-accessible positions, cutting daily maintenance time by 40%.
Long replacement intervals: engine oil (500 hours), hydraulic oil (5,000 hours), air filter (2,000 hours under normal working conditions), greatly reducing maintenance costs.
Equipped with Komatsu’s KOMTRAX remote monitoring system, supporting remote viewing of equipment location, working hours, fuel consumption and fault warning, which is convenient for fleet management and reduces unplanned downtime.

7. Typical Applications

The PC350-7 can be matched with a variety of attachments (hydraulic breaker, grapple, ripper, long-reach boom) to adapt to different scenarios:

Large-scale earthmoving, site clearance and foundation digging for high-rise buildings
Quarry loading, overburden removal and ore transport in open-pit mines
Road, railway and water conservancy infrastructure construction
Medium-sized demolition works when equipped with breakers

Core Strengths

Perfect matching between Komatsu self-developed engine and hydraulic system, balancing high work efficiency and low fuel consumption
Ultra-low failure rate and long service life, supporting high residual value in the second-hand construction equipment market
Mature global after-sales service and spare parts supply network, ensuring low operation and maintenance costs in all regions.

Non flooded

No accident

Original product

Used Komatsu 350-7 Excavator

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