Used Komatsu 55 Excavator

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Komatsu 55 (PC55MR Series) Compact Excavator Detailed Introduction

The Komatsu 55, officially named the Komatsu PC55MR series (the latest 2024 generation is PC55MR-5, with earlier generations including PC55MR-3 for low-emission-regulation markets), is a 5-ton class mini crawler excavator developed and produced by Komatsu Ltd., the world-leading Japanese construction equipment manufacturer. It is one of the best-selling compact excavator models globally, favored for its high efficiency, durability, maneuverability, and low total operating cost.

1. Core Technical Specifications (For PC55MR-5, standard configuration)

Item	Parameter
Operating Weight	5,210 kg – 5,460 kg (11,486 lbs – 12,037 lbs)
Engine	Komatsu SAA3D88E-6 3-cylinder water-cooled direct-injection diesel engine, compliant with EU Stage V / U.S. EPA Tier 4 Final emission standards
Gross Power	37.3 kW (50 hp) at 2,400 rpm
Max Digging Depth	3,640 mm (11 ft 11 in)
Max Digging Reach	5,940 mm (19 ft 6 in)
Max Bucket Breakout Force	40.2 kN (9,040 lbf)
Max Arm Digging Force	25.5 kN (5,730 lbf)
Bucket Capacity	0.06 m³ – 0.22 m³ (0.08 cu yd – 0.29 cu yd)
Travel Speed	2.2 km/h (low) / 4.5 km/h (high)
Swing Speed	10 rpm
Standard Dozer Blade Width	1,960 mm (6 ft 5 in)

2. Key Features

2.1 High Efficiency & Low Consumption

Equipped with Komatsu's proprietary HydrauMind hydraulic system, which realizes precise matching of power and hydraulic flow, reducing energy loss by 12% compared to the previous generation.
Built-in ECO mode, automatic idle, and auto-shutdown functions cut fuel consumption by up to 10% during light-load operations, with an average fuel consumption of only 3-4 L per hour under conventional working conditions.

2.2 Ultra Maneuverable for Narrow Spaces

Adopts a zero-tail swing design: the rear swing radius of the upper structure is smaller than the track width, so it will not hit obstacles when rotating in confined areas such as urban narrow streets, indoor spaces, or residential yards.
Short wheelbase design supports in-situ steering, and the optional rubber track will not damage asphalt or sidewalk surfaces, making it ideal for municipal projects.

2.3 Operator-Friendly Design

The cab is certified with ROPS (Roll-Over Protective Structure) and FOPS (Falling Object Protective Structure), ensuring operator safety under harsh working conditions.
Cabin noise is controlled at only 72 dB(A), with a fully adjustable suspension seat, high-efficiency cooling and heating air conditioning, and wide field of view.
3.5-inch full-color LCD monitor displays real-time operating data, maintenance reminders, and fault warnings, reducing operation difficulty.

2.4 High Durability & Easy Maintenance

The boom, arm, and undercarriage are made of high-strength wear-resistant steel, and all welds are tested for stress resistance to adapt to long-term heavy-load operations.
All daily maintenance points (oil filter, air filter, fuel filter, hydraulic oil level check port, etc.) are arranged at ground-accessible positions, eliminating the need to climb the machine for routine maintenance.
Extended maintenance intervals: engine oil replacement every 500 operating hours, hydraulic oil replacement every 2000 operating hours, greatly reducing downtime and maintenance costs.
Standard equipped with Komatsu KOMTRAX remote monitoring system, supporting real-time tracking of equipment location, operating hours, fuel consumption, and fault warnings, which is convenient for fleet management and anti-theft.

2.5 Strong Versatility

Supports optional hydraulic quick coupler, which can replace attachments within 30 seconds. Compatible attachments include: breaking hammer, auger, grab bucket, grading blade, milling machine, snow plow, etc., to meet the needs of different working conditions.

3. Typical Application Scenarios

Urban municipal construction: pipe laying, sidewalk repair, landscaping, trench digging
Indoor and old building demolition
Residential and small commercial project construction: foundation digging, site cleaning
Agricultural infrastructure: orchard management, irrigation ditch digging, greenhouse construction
Material handling, waste sorting, and winter snow removal

4. Optional Configurations

Steel tracks for heavy-duty rugged construction sites
Angle dozer blade for high-precision grading work
Rear backup camera to improve reversing safety
Extra working lights for night operation
Rotating grapple for waste and wood handling

Komatsu PC55MR series excavators also have a much higher resale value than competing models of the same class, supported by Komatsu's global 2000+ after-sales service outlets, which provide genuine spare parts, professional maintenance, and 24/7 technical support for users worldwide.

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Original product

Used Komatsu 55 Excavator

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