Used Komatsu 350-7 Excavator

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Komatsu PC350-7 Crawler Excavator Detailed Introduction

The Komatsu PC350-7 is a classic 35-ton class medium-heavy crawler excavator developed by Komatsu (Japan), belonging to the brand's 7th-generation hydraulic excavator lineup. Launched in the early 2000s, it integrates Komatsu's core technologies in engine, hydraulic system and structural design, balancing strong power, fuel efficiency and extreme durability. It is widely recognized by global engineering contractors and equipment leasing operators, and remains one of the most popular models in the second-hand heavy equipment market.

1. Core Specifications

Item	Parameter
Operating Weight	33,600 – 35,200 kg
Engine Model	Komatsu SAA6D114E-3 6-cylinder turbocharged intercooled diesel engine
Rated Power	184 kW / 247 HP @ 2000 rpm
Emission Standard	EU Stage III / EPA Tier 3
Standard Bucket Capacity	1.4 – 1.9 m³ (customizable up to 2.2 m³ for light earthwork)
Max. Digging Depth (standard boom + arm)	7,380 mm
Max. Digging Radius	11,100 mm
Max. Digging Height	10,210 mm
Swing Speed	10 rpm
Travel Speed	3.2 km/h (low) / 5.5 km/h (high)
Max. Traction Force	275 kN
Gradeability	70% (35°)
Fuel Tank Capacity	580 L
Hydraulic Oil Tank Capacity	246 L

2. Core Performance Features

High Efficiency & Low Fuel Consumption

Equipped with Komatsu's proprietary Closed Load Sensing System (CLSS, HydrauMind hydraulic system), which delivers precise hydraulic flow matching for compound actions (boom lifting + arm pulling + swing), ensuring smooth operation even under heavy loads.
2 selectable working modes: Power mode (P mode) for heavy-duty mining/rock working conditions, Economy mode (E mode) reduces fuel consumption by 8-12% for light earthwork, meeting different construction demands.
Built-in automatic idle and auto deceleration functions: When the operating lever is inactive for more than 4 seconds, the engine automatically reduces to idle speed, cutting unnecessary fuel waste.
Boom and arm regeneration circuits reduce hydraulic oil supply demand, improving action speed and lowering energy loss.

Strong Adaptability to Harsh Conditions

The electronically controlled common rail engine has strong high-altitude and high-temperature adaptability, works stably at altitudes below 4000m and ambient temperatures between -20℃ and 45℃ (custom cold start kits support operation at -40℃).

3. Structure & Durability

The main frame, travel chassis and working device (boom, arm) are made of high-strength low-alloy steel, all welding joints are subject to ultrasonic flaw detection and stress relief treatment, with strong impact resistance to adapt to long-term heavy load operations in mining and quarry scenarios.
Sealed and lubricated track rollers, carrier rollers and track links extend service life by 30% compared with ordinary products, reducing wear and maintenance costs.
Standard bucket is made of wear-resistant NM400 steel, optional reinforced rock bucket with wear plate overlay for stone loading and mining works.
All pins and bushings are treated with high-frequency surface hardening, with wear resistance increased by 40%.

4. Operation & Comfort

The cab is ROPS (Roll Over Protective Structure) and FOPS (Falling Object Protective Structure) certified, ensuring operator safety in high-risk construction scenarios such as demolition and mining.
The fully enclosed cab has a sound insulation design, internal operating noise is controlled below 75dB(A), greatly reducing operator fatigue during long shifts.
Multi-adjustable air suspension seat, adjustable pilot control joysticks with low operating force, suitable for operators of different body types.
Large LCD monitor displays real-time operating data including engine water temperature, hydraulic oil temperature, fuel level, operating hours and fault codes, facilitating real-time mastery of equipment status.
High-efficiency air conditioning system with multi-directional air outlets, equipped with storage compartments, cup holders and other humanized designs.

5. Maintenance Convenience

All daily maintenance points (engine oil filter, fuel filter, hydraulic oil return filter, air filter) are arranged at ground-accessible positions, no need to climb the upper frame for routine maintenance, saving maintenance time.
Two-stage air filter with high dust filtration efficiency, suitable for construction scenarios with high dust content such as mines and quarries.
The modular parallel radiator is easy to clean, avoiding overheating under long-term heavy load operation.
Long maintenance cycle: engine oil replacement every 500 operating hours, hydraulic oil replacement every 5000 operating hours, reducing long-term operating costs.
Optional Komatsu remote monitoring system, supporting real-time location tracking, operating data query and fault warning for fleet management.

6. Typical Application Scenarios

Large-scale earthwork construction (subgrade construction of highways, railways and airports)
Open-pit mining overburden stripping and ore loading
Quarry stone loading and crushing work (with hydraulic breaker attachment)
Water conservancy project excavation and dredging
Urban demolition works (with extended boom and breaker)
Port bulk cargo handling and logistics yard stacking

7. Optional Configurations

Different types of buckets: earthwork bucket, rock bucket, grid bucket, cleaning bucket
Working devices: extended long boom (for deep excavation or high demolition), quick coupler (for fast attachment replacement)
Attachments: hydraulic breaker, grapple, ripper, auger
Customized kits: cold area kit (engine preheater, heated cab), high temperature kit (enhanced radiator), anti-slip track plate, on-board weighing system

The Komatsu PC350-7 is famous for its ultra-high reliability, low operating cost and high residual value, making it one of the most cost-effective choices in the 30-40 ton excavator segment.

Non flooded

No accident

Original product

Used Komatsu 350-7 Excavator

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