Used Komatsu 350-7 Excavator

Reading: 2003

Detailed Introduction of Komatsu PC350-7 Crawler Excavator

The Komatsu PC350-7 is a classic medium-heavy crawler excavator launched by the global leading construction equipment manufacturer Komatsu, as a core product of its 7-series excavator lineup. Positioned in the 33-ton class, it balances strong power, high fuel efficiency, and exceptional durability, designed for heavy-duty operation scenarios worldwide. It complies with EU Stage II / US Tier 2 emission standards, and is widely recognized for high reliability, low operating cost and excellent retained value, making it one of the most popular models in its weight class.

1. Core Technical Specifications

Item	Parameter
Operating Weight	32,600 – 34,800 kg
Engine Model	Komatsu SAA6D114E-2 turbocharged, intercooled 6-cylinder diesel engine
Gross Rated Power	184 kW (247 HP) @ 2000 rpm
Bucket Capacity	1.4 – 2.1 m³ (standard 1.6 m³ earthmoving bucket)
Max. Digging Depth (standard configuration)	7,380 mm
Max. Digging Radius	11,100 mm
Max. Dumping Height	7,110 mm
Swing Speed	10.8 rpm
Travel Speed	3.2 km/h (low) / 5.5 km/h (high)
Gradeability	70% (35°)
Main Hydraulic Relief Pressure	34.3 MPa
Ground Contact Pressure (standard track shoe)	62 kPa
Fuel Tank Capacity	580 L
Hydraulic Oil Capacity	246 L

2. Core Performance Features

2.1 High-efficiency Powertrain

The self-developed SAA6D114E-2 engine delivers strong low-end torque, ensuring stable power output even under extreme heavy load conditions. Komatsu’s unique electronic fuel injection system optimizes fuel combustion, reducing fuel consumption by 6-9% compared to the previous 6-series model, while meeting strict emission requirements.

2.2 Advanced Hydraulic System

It adopts Komatsu’s proprietary CLSS (Closed Load-Sensing System), which precisely matches hydraulic flow to actual operation demands, delivering fast response and ultra-smooth composite movements (simultaneous digging, swinging and lifting without power lag). The system supports 4 customizable work modes:

H (Heavy Duty) Mode: For extreme heavy load operations such as hard rock digging
P (Power) Mode: For high-efficiency earthmoving and loading scenarios
E (Economy) Mode: For light load operations to maximize fuel efficiency
Attachment Mode: Pre-set pressure and flow parameters for breakers, grapples, augers and other attachments, no secondary hydraulic modification required.

2.3 Precision Control

The low-force pilot control system reduces operator fatigue during long-hour work, and ensures precise control of fine movements, suitable for fine grading, trenching and other precision operation scenarios.

3. Structural Durability

The boom and arm are made of high-strength alloy steel, with reinforced welding at high-stress points, passing 10,000-hour heavy load fatigue tests.
The X-type chassis frame has high torsional and impact resistance, adapting to rough construction sites such as mines and quarries.
Sealed and lubricated track chain, heavy-duty rollers and idlers extend service life by 30% compared to ordinary models; optional reinforced rock-type track shoes are available for mining scenarios.
Standard buckets are made of wear-resistant steel, optional reinforced rock buckets, grid buckets and ditch cleaning buckets are provided for different working conditions.

4. Operator Comfort & Safety

The cab meets international ROPS (Roll-Over Protective Structure) and FOPS (Falling Object Protective Structure) standards, ensuring operator safety in high-risk scenarios such as demolition and mining.
Fully sealed and pressurized cab isolates dust and noise, with internal noise as low as 72 dB(A).
Adjustable air-suspension seat with lumbar support and multi-directional adjustable armrests greatly reduce long-term operation fatigue.
High-performance air conditioning system with 8 air outlets, providing rapid cooling and heating for extreme temperature environments.
Large-area frameless glass offers 360° panoramic view, and high-speed wiper covers 90% of the front window, ensuring visibility in rainy and dusty conditions.
LCD digital instrument panel displays real-time operating parameters (fuel level, water temperature, oil pressure, working hours, etc.) and active fault warning, reminding operators of potential abnormalities in time.

5. Maintenance & Cost Control

All daily maintenance points are arranged at ground-accessible positions, allowing easy replacement of oil filters, fuel filters, air filters and hydraulic oil filters without climbing the machine.
Two-stage air filter with 99.8% dust filtration efficiency, suitable for high-dust construction sites, with extended replacement cycle.
Long maintenance intervals: 500 hours for engine oil replacement, 5000 hours for hydraulic oil replacement, greatly reducing downtime and maintenance cost.
Komatsu EMMS (Equipment Management Monitoring System) supports fault code reading, helping maintenance personnel locate problems quickly and reduce repair time.
Optional automatic central lubrication system, delivering regular and quantitative lubrication to all friction points, avoiding manual lubrication omissions.

6. Application Scenarios

The PC350-7 adapts to a wide range of operation scenarios:

Large-scale infrastructure construction: highway, railway, bridge and airport construction, large-scale earthmoving and leveling
Mining and quarrying: overburden stripping, ore loading and hard rock excavation
Water conservancy projects: river dredging, reservoir construction and embankment reinforcement
Urban construction: demolition work with hydraulic breakers, foundation excavation
Material handling: timber, scrap steel and bulk cargo handling with grapples and other attachments

7. Optional Configurations

Customized boom/arm combinations: short heavy-duty boom for rock work, extended long reach boom for deep digging and high dumping
Attachment accessories: quick coupler, hydraulic breaker pipeline, grapple interface
Special environment configurations: cold start kit for low temperature areas, enhanced cooling system for tropical regions, flame retardant kit for forestry work
Intelligent accessories: rear view camera, GPS positioning system, automatic lubrication system

Conclusion

As a proven classic model of Komatsu, the PC350-7 has a high global market share, complete after-sales service network and easily accessible spare parts, making it a cost-effective choice for construction teams engaged in medium and large-scale projects.

Non flooded

No accident

Original product

Used Komatsu 350-7 Excavator

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