Used Komatsu 55 Excavator

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Detailed Introduction to Komatsu 55 (Komatsu PC55MR Series) Excavator

The Komatsu 55 generally refers to the PC55MR series 5-ton class compact crawler excavator produced by Komatsu Ltd., the world-leading Japanese construction equipment manufacturer. As a core product in Komatsu's small excavator lineup, it is designed for high efficiency, maneuverability and reliability in narrow working scenarios, and is one of the most popular 5-ton mini excavators in the global market. The latest mass-produced model in the series is the PC55MR-5.

1. Core Technical Specifications

Item	Parameter
Operating Weight	5210 kg – 5450 kg (varies with configuration)
Engine	Komatsu 3D88E-7 diesel engine, compliant with EU Stage V / US EPA Tier 4 Final emission standards
Rated Net Power	36.2 kW at 2400 rpm
Standard Bucket Capacity	0.09 m³ – 0.22 m³
Max. Digging Depth	3840 mm
Max. Digging Height	5860 mm
Max. Dumping Height	4140 mm
Bucket Digging Force	40.1 kN
Arm Digging Force	25 kN
Tail Swing Radius	1290 mm (ultra-short, no overhang beyond track width when rotating)
Travel Speed	2.8 km/h (low) / 4.6 km/h (high)
Fuel Tank Capacity	75 L
Noise Level Inside Cab	≤74 dB(A)

2. Core Performance Advantages

2.1 High Efficiency & Low Energy Consumption

Equipped with Komatsu's exclusive closed-center load sensing hydraulic system (CLSS), it supports smooth compound operations (boom, arm, bucket, swing work simultaneously) with no action lag, especially suitable for fine construction work.
Two working modes are available: Power mode for heavy load operations, Economy mode to reduce fuel consumption by 6-9% compared with the previous generation PC55MR-3 under the same working conditions. The automatic idle function reduces engine speed to low idle after 3 seconds of inactivity, further cutting fuel waste.

2.2 High Reliability

Reinforced X-type chassis and forged track components (idlers, rollers, sprockets) resist impact and wear, adapting to harsh construction environments such as rocky sites and muddy roads.
The integrated electronic control system has real-time fault monitoring and early warning functions, reducing the probability of sudden failures, and the average trouble-free working time is 20% higher than similar products of other brands.

3. Design Highlights

3.1 Narrow Space Adaptability

As part of Komatsu's MR (Minimum Radius) product line, its ultra-short tail design allows it to work freely in confined spaces including urban sidewalks, indoor demolition sites, orchards and narrow pipe trenches.

3.2 Operator Comfort

The cab is ROPS/FOPS certified to meet global construction safety standards, with a wide field of view without blind spots.
Standard adjustable suspension seat, fully sealed dustproof and sound insulation design, and air conditioning system greatly reduce operator fatigue during long-time operation. The LCD monitor displays real-time operating data, fuel level, maintenance reminders and other information.

3.3 Easy Maintenance

All daily maintenance points (oil filter, air filter, fuel filter, oil filling port) are arranged on the side of the fuselage, which can be accessed by opening the side hood without climbing the machine. Daily routine inspection and maintenance takes less than 10 minutes, greatly reducing downtime.

4. Main Application Scenarios

Municipal engineering: Trench excavation for pipe/cable laying, road repair, sidewalk construction
Landscaping: Tree planting pit digging, landscape shaping, garden construction
Indoor renovation: Small space demolition, construction waste removal inside buildings
Agriculture and forestry: Orchard management, greenhouse construction, farmland water conservancy renovation
Material handling: Bulk material loading, site cleaning, small cargo transfer

5. Optional Configurations

Users can choose optional accessories according to work needs:

Auxiliary hydraulic pipeline for supporting breakers, augers, hydraulic grapples, shears and other attachments
Rubber tracks (to avoid damaging asphalt/cement road surfaces) or steel tracks with rubber pads
Quick coupler for fast replacement of different attachments within 1 minute
Rear view camera, heated seat, anti-theft system, etc.

The Komatsu 55 series is widely praised by global users for its low failure rate, low operating cost and high residual value, and is the first choice for small construction teams and rental operators.

Non flooded

No accident

Original product

Used Komatsu 55 Excavator

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