Used Komatsu 55 Excavator

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Detailed Introduction to Komatsu 55 (PC55MR Series) Excavator

The "Komatsu 55" generally refers to the Komatsu PC55MR series compact crawler excavator, a core 5.5-ton class mini excavator product line developed and manufactured by Komatsu Ltd., the global top-tier construction equipment manufacturer. It is designed for high-efficiency operations in narrow and confined spaces, and is widely favored by small engineering contractors, rental operators and individual owners worldwide for its high reliability, low operating cost and strong versatility.

1. Core Technical Specifications (Latest PC55MR-5 Model)

Item	Parameter
Operating Weight	5,210 kg – 5,580 kg (varies with configuration)
Standard Bucket Capacity	0.09 m³ – 0.22 m³
Engine Model	Komatsu SAA3D88E-7 (3-cylinder, water-cooled diesel engine)
Rated Net Power	36.2 kW @ 2,400 rpm
Emission Standard	EU Stage V / U.S. Tier 4 Final / China Stage IV
Max. Digging Depth	3,820 mm
Max. Digging Reach	6,120 mm
Max. Dumping Height	4,120 mm
Travel Speed (High/Low)	4.5 km/h / 2.4 km/h
Swing Speed	9 rpm
Tail Swing Radius	1,100 mm
Hydraulic System Working Pressure	24.5 MPa

2. Core Advantages & Design Highlights

2.1 High-Efficiency, Low-Consumption Powertrain

The self-developed Komatsu diesel engine adopts EGR + DOC aftertreatment technology, no DPF (Diesel Particulate Filter) regeneration is required, which reduces maintenance downtime and long-term operating costs.
Matched with Komatsu's proprietary HydrauMind load-sensing hydraulic system, it achieves precise control of boom, arm and bucket movements, smooth compound actions, and 8~10% lower fuel consumption compared to the previous generation PC55MR-3.

2.2 Ultra-Suitable for Confined Spaces

Adopts an extremely short tail swing design, the rear part of the body barely protrudes beyond the track width when rotating, which can safely operate in narrow sites such as urban alleys, indoor spaces, and areas with dense obstacles without colliding with surrounding objects.
The standard integrated dozer blade supports backfilling, site leveling, and can be lowered to improve the stability of the whole machine during heavy digging operations.

2.3 Safe & Comfortable Operation Experience

The cab meets ROPS (Roll Over Protective Structure) and FOPS (Falling Object Protective Structure) international safety certification standards, providing maximum protection for operators.
The fully sealed cab has excellent sound insulation, the internal operating noise is as low as 74 dB(A); equipped with a fully adjustable suspension seat, ergonomic control joysticks, and a high-definition LCD monitor, which reduces operator fatigue during long working hours.
The short boom design provides a wide field of view, and all parts of the front working device are within the operator's visible range, effectively reducing blind spots and improving operation safety.

2.4 High Durability & Easy Maintenance

The X-type reinforced chassis, thickened high-strength steel boom and arm, and dust-sealed pin shafts all have extended service life, and can adapt to harsh construction environments such as gravel and rocky sites.
All daily maintenance points (engine oil filter, fuel filter, hydraulic oil filter, air filter, etc.) are arranged at ground-accessible positions, and the side cover can be opened for quick maintenance, which greatly reduces daily maintenance time.
Equipped with Komatsu's standard KOMTRAX remote monitoring system, which supports real-time viewing of equipment location, working hours, fuel consumption, fault codes and other data, which is convenient for fleet management and fault prediction.

3. Typical Application Scenarios

Municipal engineering: Trench excavation for water, electricity, gas and communication pipelines, small foundation construction, urban road maintenance.
Landscaping: Tree pit digging, site leveling, river and pond dredging, garden construction.
Interior and demolition work: Indoor demolition, old house renovation, as its compact size allows it to enter indoor spaces through elevator doors and standard building entrances.
Agricultural projects: Farmland renovation, orchard trenching, greenhouse construction, livestock farm manure cleaning.
Special operations: Can be matched with a variety of attachments for snow removal, scrap sorting, material handling, etc.

4. Optional Configurations

Work attachments: Various specifications of buckets (narrow bucket, wide bucket, rock bucket), hydraulic breaker, hydraulic shear, auger, log grapple, etc.
Convenience configurations: Quick coupler (for fast attachment replacement), heated seat, rearview camera, additional working lights.
Chassis configurations: Steel track, rubber track block, extended dozer blade.

Overview

The Komatsu PC55MR series excavator has a very high market retention and residual value rate globally. Its balanced performance and low failure rate make it one of the most popular products in the 5-ton class mini excavator market, which can meet the diversified operation needs of different users.

Non flooded

No accident

Original product

Used Komatsu 55 Excavator

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