Used Komatsu 55 Excavator

Reading: 2017

Detailed Introduction to Komatsu 55 (Komatsu PC55MR-5) Compact Excavator

The Komatsu 55 excavator generally refers to the PC55MR-5, a 5.5-ton class mini excavator developed by Komatsu Ltd., the world-leading Japanese construction equipment manufacturer. It is one of the best-selling models in Komatsu's compact equipment lineup, tailored for high flexibility, efficiency and durability in narrow working scenarios.

1. Core Specifications

Parameter	Details
Operating Weight	5,310 – 5,660 kg (varies with configuration: cab/canopy, bucket size, optional attachments)
Engine	Komatsu 4D88E-7 4-cylinder diesel engine, net power 29.4 kW (39.4 hp) at 2400 rpm, compliant with EU Stage V / U.S. EPA Tier 4 Final emission standards
Bucket Capacity	0.05 – 0.22 m³
Digging Performance	Max digging depth: 3790 mm; Max digging reach: 6080 mm; Max dumping height: 4040 mm
Travel Speed	High: 4.5 km/h; Low: 2.8 km/h
Swing Speed	9 rpm
Tail Swing Radius	Only 1100 mm (ultra-short swing design)

2. Core Performance Advantages

2.1 High-Efficiency Hydraulic System

It is equipped with Komatsu's proprietary Closed-Center Load Sensing System (CLSS), which matches engine output with hydraulic demand in real time, cutting unnecessary energy loss while ensuring smooth, jitter-free action response. The variable displacement piston pump supports precise flow control, making it ideal for fine operations such as precision grading, pipe laying and delicate demolition.

2.2 Ultra-Narrow Space Adaptability

The ultra-short tail swing design allows the machine to operate freely in confined spaces including urban residential areas, indoor demolition sites, roadside trenches and farmland renovation sites, avoiding collision with surrounding obstacles.

2.3 Wide Attachment Compatibility

It is pre-installed with auxiliary hydraulic lines and quick coupler interface, and can be quickly adapted to a variety of work tools: hydraulic breaker, auger, grapple, ripper, grading bucket, etc., covering almost all small and medium-sized construction scenarios.

3. Operator Comfort & Safety

Safety-certified cab: The ROPS/FOPS certified cab (canopy is optional for cost-sensitive users) is designed with panoramic frameless glass, providing 360° unobstructed vision to eliminate operation blind spots. Interior noise is controlled below 75 dB(A) for a quiet working environment.
Ergonomic design: Fully adjustable suspension seat paired with low-effort proportional control joysticks reduces operator fatigue during long-hour work. The LCD monitor displays real-time operating parameters (fuel level, water temperature, hydraulic oil temperature, fault codes, etc.) for easy status checking.
Multi-level safety guarantees: Equipped with travel alarm, swing alarm, one-touch emergency stop button, anti-slip footrests and handrails on the upper frame, fully protecting the safety of operators and surrounding construction personnel.

4. Low Operating & Maintenance Cost

Convenient maintenance access: All daily maintenance points (fuel filter, oil filter, air filter, hydraulic oil filter, etc.) are arranged on the ground-accessible side of the machine, no need to climb onto the upper frame for routine inspection, cutting maintenance time by more than 30%.
High durability: Reinforced boom and arm made of high-strength wear-resistant steel, heavy-duty undercarriage with sealed track chains and wear-resistant track shoes, adapt to harsh rocky working conditions and reduce the replacement frequency of wearing parts.
Low fuel consumption: With Komatsu's exclusive energy-saving control technology, its comprehensive fuel consumption is only 3-4 L per hour under standard working conditions, 10-15% lower than similar products of the same level.
Intelligent management: Standard equipped with Komatsu's KOMTRAX remote monitoring system, owners can check the machine's location, working hours, fuel consumption, maintenance reminders and fault information in real time via mobile phone or PC, facilitating fleet management and preventive maintenance.

5. Common Application Scenarios

Urban infrastructure: Pipe laying, sidewalk renovation, landscaping, foundation excavation for small buildings
Confined space operation: Indoor demolition, basement construction, factory facility renovation
Agricultural & rural construction: Farmland water conservancy renovation, orchard planting pit digging, rural housing construction
Municipal maintenance: Road trench excavation, cable laying, public space cleaning, winter snow removal

As a classic compact excavator model, the Komatsu PC55MR-5 is widely recognized by global users for its reliable quality, high operation efficiency and low total cost of ownership, making it an ideal choice for small and medium-sized construction operators.

Non flooded

No accident

Original product

Used Komatsu 55 Excavator

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