Used Komatsu 400 Excavator

Reading: 2006

Komatsu PC400 Series Heavy-Duty Crawler Excavator Full Introduction

The "Komatsu 400" generally refers to the Komatsu PC400 series of heavy crawler excavators, a flagship product line of Komatsu Ltd. (the Japan-based global leader in construction and mining equipment). It is tailored for high-intensity, large-scale operation scenarios, with a reputation for high reliability, fuel efficiency and long service life across global markets.

1. Core Specifications (Take the latest PC400-11 / PC400-8M0 mainstream variant as reference)

Parameter	Details
Operating weight	41,100 – 44,200 kg (varies by boom/arm/bucket configuration)
Engine	Komatsu proprietary SAA6D125E-7 6-cylinder turbocharged common rail engine, displacement 11.04L
Rated net power	257 kW / 345 HP @ 1900 rpm
Emission standard	Tier 4 Final / EU Stage V (latest variants), Tier 3/Stage IIIA for emerging market versions
Standard bucket capacity	1.9 – 2.7 m³, optional rock bucket up to 3.1 m³ for mass excavation
Maximum digging depth	6,920 mm (standard arm) / up to 9,800 mm (long-reach configuration)
Maximum digging reach	10,700 mm (standard arm) / up to 14,500 mm (long-reach configuration)
Bucket breakout force	283 kN
Arm breakout force	232 kN
Travel speed	3.2 – 5.5 km/h (2 gear modes)
Maximum grading slope	70% (35°)
Fuel tank capacity	650 L

2. Core Technical Advantages

(1) High-efficiency hydraulic system

Equipped with Komatsu's proprietary HydrauMind closed-center load-sensing hydraulic system, it dynamically adjusts oil flow distribution according to real operation demand, reduces energy loss by 12~18% compared to older PC400-7 models, and delivers smooth, responsive control for both heavy rock digging and fine grading tasks.

(2) Durable structure design

The main frame, boom and arm are made of high-tensile steel, with reinforced welding at high-stress points to withstand impact loads in mining and quarry scenarios. The designed service life exceeds 15,000 working hours under standard operation conditions.

(3) Low operating cost

The electronically controlled fuel injection system, matched with variable geometry turbocharger and exhaust aftertreatment (DOC+SCR for low-emission versions), meets strict emission standards without power loss. Its average hourly fuel consumption is 25~35L under full load, 5~8% lower than competing models of the same tonnage. Service intervals for engine oil, hydraulic oil and filters are extended by 20% to cut maintenance costs.

(4) Operator comfort

The cab has ROPS/FOPS safety certification, with interior noise controlled below 70dB(A). It is fitted with ergonomic adjustable joysticks, air suspension seats, a high-definition 7-inch LCD monitor that displays real-time operation data, fault alerts and maintenance reminders. Optional climate control systems are available for extreme cold/hot working environments.

3. Main Application Scenarios

Large construction projects: Foundation excavation, earthmoving for highways, railways, airports and water conservancy projects
Mining and quarry operations: Overburden stripping, ore loading, hard rock excavation
Heavy demolition: Can be fitted with hydraulic breakers, pulverizers for demolition of large industrial buildings and infrastructure
Bulk material handling: Equipped with grapples, clamshell buckets for loading/unloading work in ports, logging yards and waste treatment plants

4. Optional Configurations & Attachments

Working device combinations: Standard boom/arm, long-reach boom, mass excavation boom
Bucket options: General purpose bucket, heavy-duty abrasion-resistant rock bucket, sand bucket
Attachments: Hydraulic breaker, ripper, timber grapple, scrap magnet, quick coupler for fast attachment switching
Custom kits: Cold start kit (for -40℃ environments), desert heat protection kit, automatic central lubrication system, 3D machine guidance system for precision excavation, rear-view safety camera system

5. After-sales & Residual Value

Komatsu provides after-sales service and genuine spare parts support in more than 160 countries globally. The PC400 series has a very high residual value in the second-hand construction equipment market due to its stable performance and low failure rate, with 5-year-old units retaining 45~55% of their original value under normal use.

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Used Komatsu 400 Excavator

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