Used Komatsu PC450-8 Excavator

Reading: 1657

Here is a detailed introduction to the Komatsu PC450-8 hydraulic excavator, covering its key features, technology, specifications and applications.

KOMATSU PC450-8 Hydraulic Excavator – Comprehensive Introduction

The Komatsu PC450-8 is a heavy-duty hydraulic excavator from Komatsu’s highly regarded Dash‑8 series. Designed for demanding earthmoving, quarrying, mining, mass excavation and large-scale construction projects, it combines brute digging force with advanced electronics, reduced fuel consumption and a comfortable working environment. Its robust structure and smart hydraulic system make it one of the most reliable and productive machines in the 45‑tonne class.

1. Engine & Emissions

The heart of the PC450-8 is a Komatsu SAA6D125E‑5 water-cooled, 4-cycle, direct-injection diesel engine with turbocharging and air‑to‑air aftercooling.

Displacement: 11.04 litres
Net flywheel power: 257 kW / 345 HP @ 1,900 rpm (ISO 9249 / SAE J1349)
Ecot3 technology: High‑pressure common‑rail injection, cooled exhaust gas recirculation (EGR) and a diesel oxidation catalyst (DOC) work together to meet EU Stage IIIA / EPA Tier 3 emission standards.
E‑mode selection: The engine automatically adapts to working conditions. A multi‑mode system offers Power (P), Economy (E), Lifting (L) and Breaker (B) modes, letting the operator match engine speed and pump absorption to the task and save fuel without losing breakout force.

2. Hydraulic System & Performance

The excavator uses a closed‑center load‑sensing system (CLSS) with variable‑displacement piston pumps that supply oil only when and where it is needed, minimising energy loss.

Main pump flow: 2 × 378 L/min
Pilot pump flow: 32 L/min
Maximum working pressure: 37.3 MPa (implement/travel circuit)
Hydraulic tank capacity: 300 litres
Arm & boom regeneration: Hydraulic regeneration on the boom and arm circuits speeds up the cycle time and reduces fuel consumption.
Attachment flow settings: The in‑cab monitor allows the operator to adjust oil flow and pressure for a wide range of attachments (breakers, crushers, shears) directly from the seat.

3. Operator Environment

The PC450-8 cab is a quiet, pressurised and vibration‑dampened workspace that meets ROPS (Roll‑Over Protective Structure) and FOPS (Falling Object Protective Structure) standards.

High‑resolution 7‑inch LCD colour monitor: Displays machine data, rear‑view camera feed, Komtrax information and maintenance alerts. The interface is multilingual and user‑friendly.
KomVision (optional/standard in some markets): A 360‑degree bird’s‑eye view system using four cameras (front, rear, left, right) that dramatically reduces blind spots.
Ergonomic controls: Proportional pressure joysticks with low‑effort levers, a large adjustable armrest and a heated, air‑suspended seat with lumbar support.
Climate control: Automatic air conditioning with multiple vents ensures a comfortable temperature regardless of outside conditions.
Low‑noise design: Engine mounts, cab suspension and sound‑absorbing materials bring interior noise down to approximately 70 dB(A).

4. Structure & Undercarriage

Built for extreme durability, the PC450-8 features a reinforced X‑frame undercarriage and a thick‑plate upper structure.

Track frames: Heavy‑duty box‑section design with large diameter track rollers and idlers.
Track shoes: Standard triple grouser shoes 600 mm wide; optional 700, 800 or 900 mm for flotation.
Travel speeds:
- High: 5.5 km/h
- Mid: 4.2 km/h
- Low: 3.1 km/h (automatic shifting)
Drawbar pull: Maximum 308 kN (31,400 kgf) at low speed.
Gradeability: 70% (35° continuous climb).
Swing system: Axial piston motor with swing‑in‑brake and wet‑type multiple disc parking brake; swing speed 9.0 rpm.

5. Work Equipment & Attachments

Boom/arm configurations: Standard boom (7,060 mm) with arm lengths of 3,380 mm, 2,900 mm or 3,900 mm to optimise reach or digging force.
Bucket capacity: ISO heaped 2.10 m³ (standard), with a range from 1.80 m³ to 2.80 m³ depending on material density.
Maximum digging depth: 7,790 mm (standard arm).
Maximum reach at ground level: 11,860 mm.
Maximum dump height: 7,615 mm.
Bucket breakout force: Up to 265 kN (ISO).
Quick coupler ready: Pre‑installed hydraulic piping and bracketry for quick attachment changes.

6. Advanced Technology & Monitoring

Komtrax 5: A full telematics system that uses 3G/satellite communication to remotely track machine location, operating hours, fuel consumption, working mode usage, abnormal events and maintenance schedules. Fleet managers receive alerts via web or mobile app.
Auto‑idle shutdown: The engine switches to idle after a period of inactivity and can shut down completely after a preset time to conserve fuel and reduce emissions.
E‑modes: The machine remembers the last selected working mode, and the ECO gauge on the monitor helps the operator maintain efficient operation.
Back‑up camera & rear radar (optional): Improves site safety when slewing and reversing.

7. Easy Maintenance

Komatsu designed the PC450-8 for fast daily checks and extended service intervals.

Wide‑opening gull‑wing engine hood and service doors grant ground‑level access to all routine maintenance points.
Parallel‑mounted radiator and oil cooler: Swung out for easy cleaning, reducing clogging in dusty environments.
Fuel pre‑filter with water separator and dual‑element main fuel filter protect the high‑pressure injection system.
Remote‑mounted engine oil and hydraulic oil filters allow oil changes without entering the engine bay.
Centralised greasing block for boom, arm and bucket pins.
Extended intervals: Engine oil and filter change at 500 hours; hydraulic oil replacement at 5,000 hours (depending on application).
Battery disconnect switch and lockable caps/drain plugs for security.

8. Safety Features

ROPS/FOPS cab with tinted, shatter‑proof glass.
Emergency engine stop switch at ground level.
Anti‑slip plates and handrails on all walkways.
Automatic boom safety lock prevents the boom from drifting when the hydraulic lever is locked in neutral.
Overload warning device (optional) for lifting applications.

9. Applications

Thanks to its high horsepower, strong breakout forces and versatile hydraulic flow settings, the PC450-8 excels in:

Mass excavation and trenching
Quarry face loading and overburden removal
Heavy‑duty rock ripping and hammer work
Demolition with high‑reach or crusher attachments
General civil construction and infrastructure projects

10. Key Specifications (Standard Configuration)

Item	Value
Operating weight (with std. boom/arm/bucket)	44,300 – 45,200 kg
Engine model	Komatsu SAA6D125E‑5
Net power	257 kW / 345 HP
Bucket capacity (ISO heaped)	2.10 m³
Main pump flow	2 × 378 L/min
Max. digging depth	7,790 mm
Max. reach along ground	11,860 mm
Max. dump height	7,615 mm
Arm crowd force (ISO)	214 kN
Bucket breakout force (ISO)	265 kN
Tail swing radius	3,615 mm
Transport length	11,480 mm
Transport width (std. shoes)	3,580 mm
Transport height (to cab top)	3,690 mm
Travel speed (low/mid/high)	3.1 / 4.2 / 5.5 km/h
Swing speed	9.0 rpm
Fuel tank capacity	650 L

The Komatsu PC450-8 remains a benchmark in its size class: powerful yet efficient, robust yet easy to maintain, and packed with technology that boosts both productivity and operator confidence. Its combination of high flow hydraulics, durable undercarriage and intelligent monitoring makes it a wise investment for contractors who demand round‑the‑clock availability and low cost of ownership.

Non flooded

No accident

Original product

Used Komatsu PC450-8 Excavator

RELATED PRODUCTS

Komatsu 30

Komatsu 400-8

Komatsu 128-8

Komatsu 200-8