Thwaites 3.5t PS Dumper
Site Dumpers
Specifications
Modal
3.5 Tonne Power Swivel
Payload (Kg)
3,500
Heaped Capacity (ltrs)
1,870
Engine
Yanmar 3TNV86CHT
Rated Engine Power Output
33.3 kW (45 bhp) @ 2600 rpm
Thwaites 3.5t Power Swivel: The Compact Site Dumper for Tight Spaces
British Engineering: The Thwaites 3.5t Power Swivel is Built to Perform
In the demanding sector of small to medium construction projects, the Thwaites 3.5t Power Swivel stands out as the definitive choice for contractors and construction fleets alike. This dumper isn’t just about moving earth; it is engineered to navigate tight sites with ease while carrying a substantial payload. Manufactured in Leamington Spa, Thwaites has designed this Stage V compliant model with durability, productivity and straightforward operation at its core, helping to protect long-term value through robust build quality and reliable performance.
Under the bonnet, a dependable Yanmar engine delivers the power and torque required to handle heavy loads and challenging gradients with confidence. Paired with a hydrostatic transmission, the machine provides smooth, uninterrupted power delivery and precise control, making operation simple and efficient while reducing wear on driveline components. Delivering max torque for optimum traction and stability, the 3.5 tonne dumper offers the ideal balance of performance and manoeuvrability for urban developments, utilities projects and landscaping applications.
Thwaites 3.5 Tonne Power Swivel Dumper Key Features
Operator Comfort as Standard
Operator Comfort as Standard
Thwaites understands that a comfortable operator is a safe and productive one. The operator station on the T350 is designed to minimise fatigue during long shifts, featuring an adjustable suspension seat that absorbs vibrations. The controls are ergonomically laid out, with a column-mounted directional control lever that allows for intuitive switching between forward and reverse. Combined with responsive power steering, the hydrostatic transmission includes an inching facility that provides precise control when manoeuvring in tight spaces or positioning loads, significantly enhancing the driving experience compared with older mechanical drive dumpers.
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Safety First with the Thwaites 3.5 Tonne Power Swivel Dumper
Safety First with the Thwaites 3.5 Tonne Power Swivel Dumper
Site safety is at the heart of the T350’s design. One of the standout safety features is the Spring Activated Hydraulic Release (SAHR) handbrake, fitted as standard. This system automatically applies the parking brake when the engine is switched off, helping to prevent unintended machine movement. Visibility is equally impressive, with a camera and dash-panel monitor providing a clear view of blind spots. Full LED road lighting, reverse alarm and LED beacons further enhance site awareness.
The standout power swivel skip design provides 180° rotation, allowing operators to tip loads in restricted areas without repositioning the entire machine. This improves efficiency while helping to reduce machine movements and site risk.
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Maintenance Made Easy for Maximum Uptime
Maintenance Made Easy for Maximum Uptime
To keep equipment working efficiently, servicing the T350 has been made incredibly accessible. A lockable engine cover provides ground-level access to key service points, allowing daily checks to be completed quickly and safely. The rear access door houses the battery, power distribution board and air cleaner, while fuse and relay panels are positioned for easy access. With water-resistant electrical components rated to IP67 standards, this dumper is built to withstand challenging site conditions, ensuring maintenance remains quick and hassle-free.
REQUEST A QUOTEA Site Dumper Built for Your Industry
The Thwaites 3.5t Power Swivel Dumper is more than just a material mover; it is a versatile tool designed for the demands of modern construction sites. Its durable 6 mm steel plate skip is built to withstand daily use, featuring a plate skip with reinforced box sections and a reinforced box section fitted to key impact areas to help minimise skip damage and maximise service life.
The ability to rotate the skip through 180 degrees, combined with the machine’s compact dimensions, makes it invaluable for roadworks, utilities and housing developments where space is limited. Additional features such as an optional towing bracket, full LED road lighting and site-ready safety equipment ensure it arrives prepared for productive work from day one. By choosing the T350, operators benefit from a machine that delivers safety, compliance and dependable performance on every project.
Stay Updated with the Latest on the Thwaites
Explore the latest news, updates, and features on the Molson site. From product developments and operator insights to real-world applications, this is your hub for all things.
January 7, 2026 
Construction Solutions Built for Your Industry
In construction, staying sharp means having the right construction equipment to tackle any challenge without missing a beat. As a single-source supplier, Molson Equipment delivers industry-leading machinery from top brands, offering powerful performance and unmatched versatility. Whether you need dependable standard models or advanced machines with the latest technology, Molson has the solutions to keep your projects moving forward. Trust Molson to power your construction success—every step of the way.
Thwaites 2t HS Dumper
Site Dumpers
Model
2 Tonne Hi-Swivel Hydrostatic
Payload (Kg)
2000
Heaped Capacity (ltrs)
1205
Engine
Yanmar 3TNV88
Rated Engine Power Output
18.4 kW (24.6 bhp) @ 2000rpm
