Komatsu Track Rascal
Introducing the Komatsu PC138US-11 Road Rail Excavator – the ultimate solution for modern rail construction and maintenance. Expertly converted for rail use, this machine blends the trusted performance of Komatsu’s standard PC138US-11 with precision-engineered modifications for safe, efficient operation both on and off the tracks.
Komatsu Track Rascal
The Komatsu PC138US-11 converted by AJH Plant Engineers is built to meet the real demands of modern rail infrastructure projects. Its compact design, exceptional stability, and proven Komatsu reliability make it the ideal solution for working safely and efficiently in challenging rail environments. Whether you’re operating in tight tunnels, busy urban networks, or remote maintenance sites, the PC138 offers the perfect balance of power, manoeuvrability, and low emissions performance.
Engine Power 97.3 HP / 71.6 kW
Operating Weight 22 T / 22,000 kg
S.W.L BP 10 T / 10,000 kg
ALP 10 T / 10000 kg
QH 10.5 T / 10,500 kg
Gauge Plant
Hydrostatic Drive
For enhanced traction and braking, a hydrostatic drive solution is available. This system utilises a through-drive axle, offering superior handling of curves and minimising flange wear. The stub axle system keeps wheel loads independent of drive loads, maximising lifespan and reliability. Operators can select from various drive modes work, travel, and creep to adapt to different operating conditions, thereby increasing productivity and reducing workload. This system utilises load free wheel motors, with variable displacement control. Allowing maximum control over the drive system.
Control Systems
AJH's control system utilises an IFM visual display which can be programmed to control multiple features of the machine.
Work Modes
User-selectable modes allow tuning of the system when travelling, when working, or when fine control is required.
Bucket Diverter
Allows the user to seamlessly control hydraulic diversion for different machine attachments.
Trailer Air Brake
The compressor and brake control system is seamlessly managed to ensure optimal performance and minimise power consumption when operating air-brake trailers.
Control Systems
Steering Locks
Our machines are fitted with a steering lock safety system to prevent the steering of the road axles when the rails are engaged, keeping the machine within gauge.
Rail Axle Deployment
Through the control system, the rail axles can be deployed individually for complete control.
Rail Axle Brake Test
For improved confidence, our safety system is available with a brake test function when working on rail (Only available for hydrostatic rail axles)
InTeEx
The InTeEx Rail Rated Capacity Indicator (RCI) System is a cutting-edge safety solution explicitly designed for road-rail excavators, ensuring safe and efficient lifting operations in railway environments. This system provides real-time monitoring of load capacities, machine stability, and operational parameters, preventing overloading and reducing the risk of tipping or structural strain. With an intuitive interface, the InTeEx Rail RCI system delivers precise weight calculations and audible and visual alerts when approaching operational limits. Its seamless integration with the machine’s hydraulics allows for automatic intervention, ensuring compliance with industry safety standards and Network Rail regulations. Designed for reliability in demanding rail applications, the InTeEx Rail RCI enhances operator confidence and overall project safety.
GKD
The GKD Rail Rated Capacity Indicator (RCI) System is an advanced safety and control solution designed to enhance the operational efficiency and security of rail-based excavators. This system continuously monitors load weights, machine stability, and operational limits to prevent overloading and unsafe lifting conditions. With real-time data feedback, the GKD RCI provides operators with precise, on-screen alerts and automatic intervention if safety thresholds are exceeded. It integrates seamlessly with the excavator’s hydraulic and electronic systems, ensuring compliance with industry regulations and minimising the risk of accidents. The system is crucial for ensuring optimal performance in railway maintenance, trackside lifting, and infrastructure projects, providing peace of mind to operators and project managers alike.
IoT Portal
We can equip your machines with our IoT suite, giving you access to a powerful online portal packed with real-time insight into your fleet. View live GPS location, set up Geo leashes to define operational boundaries, and record machine-specific data such as fuel usage and error codes. For even greater visibility, add-on health monitoring equipment enables predictive maintenance functionality — identifying potential issues before they become costly failures. All of this data can be leveraged to reduce operating costs, minimise downtime, and improve the long-term reliability of your machinery.
Compliance
Allan J Hargreaves Plant Engineers Ltd (AJH) ensures that all its road-rail vehicles are fully customisable and certified for rail use in compliance with UK, Irish, or EU regulations. Founded in 1983, AJH specialises in the design, manufacture, upgrade, and maintenance of rail-road machinery and associated equipment, adhering to standards such as RIS-1530-PLT. This commitment ensures their machinery meets stringent industry standards, providing clients with reliable, compliant solutions for rail operations.
Engineering Conformance Certificate
At AJH, we have the facilities to carry out extensive machine testing, our skilled engineers are able to calibrate machines in order to ensure maximum safety whilst ensuring machine envelope requirements are met. We carry out ECC certification for your machines through our trusted partners and provide a seamless end-to-end service. We provide compliant works to RIS-1530-PLT, I-PLM-5001 (Standard for Irish Rail), BS EN 15746 and CE / UKCA Marking.
Machine Applications for the Track Rascal
The Track Rascal is a compact, highly manoeuvrable tracked Road‑Rail Vehicle designed to deliver exceptional versatility across rail maintenance, inspection and construction environments. Its lightweight build, strong hydraulic capability and ability to operate in confined spaces make it an ideal solution for worksites requiring agility, precision and reliable on‑track performance.
Rail Maintenance & Renewal Operations
The Track Rascal is engineered for efficient support across day‑to‑day rail maintenance tasks, especially in locations where larger machines cannot operate.
- Track maintenance — Sleeper handling, ballast movement, drainage works and general track repairs.
- Rail renewal support — Assisting with rail removal and installation, supporting renewal teams and handling small‑to‑medium components.
- Lineside maintenance — Vegetation clearance, embankment shaping and ditching operations.
- Confined‑area S&C work — Ideal for precision tasks in tight switch and crossing zones.
Its compact footprint allows safe operation in tunnels, narrow corridors and restricted rail environments.
Construction & Civil Engineering Applications
Despite its compact size, the Track Rascal delivers strong hydraulic performance suitable for a wide range of construction support tasks.
- Earthworks — Small‑scale excavation, trenching, grading and formation works.
- Material handling — Lifting pipes, beams, small structures and consumables.
- Utility installation — Cable laying, duct installation, drainage construction and foundation support.
- Site preparation — Clearing, levelling and minor demolition support.
Its tracked undercarriage provides excellent traction and stability on uneven or soft ground.
Specialist Road‑Rail (RRV) Operations
The Track Rascal is designed for seamless rail operation, offering rapid deployment and flexible movement along the track.
- Rapid response operations — Quickly reaching fault locations or emergency worksites.
- Confined‑space operation — Perfect for tunnels, bridges and narrow access zones.
- Precision positioning — Smooth, controlled movements for accurate placement of rail components.
- Support for larger RRVs — Transporting tools, assisting with setup and providing supplementary capability.
Its lightweight design reduces track loading, making it suitable for sensitive infrastructure or temporary worksites.
Attachment Compatibility & Multi‑Function Use
The Track Rascal supports a wide range of attachments, enabling it to adapt to multiple operational roles.
- Hydraulic tools — Breakers, cutters and compact work tools.
- Vegetation heads — For lineside clearance and brushing.
- Material handling attachments — Grabs, clamps and lifting aids.
- Inspection equipment — Cameras, sensors and measurement tools.
This versatility allows the Track Rascal to switch roles quickly, improving productivity across multi‑discipline rail projects.
Digital & Operational Integration
The Track Rascal can be equipped with modern digital systems to enhance operational oversight and fleet management.
- GPS tracking — Real‑time location monitoring across the rail network.
- Geo‑fencing — Controlled operational zones for safety and compliance.
- Telematics — Monitoring performance, utilisation and maintenance needs.
- Predictive maintenance — Reducing downtime and extending machine life.
These features support efficient fleet management and long‑term reliability.
Why the Track Rascal Stands Out
- Compact, agile and highly manoeuvrable
- Ideal for confined or restricted access areas
- Strong hydraulic performance for its size
- Rapid deployment and flexible on‑track movement
- Wide attachment compatibility
- Proven reliability across UK rail operations
Compact, manoeuvrable and perfect for confined rail environments.
The Track Rascal is available to purchase with complete configurability for confined‑space rail operations.
Choose from bespoke attachments, rail adaptations and custom performance features.