Wraps come off new range topping 50 tonne class excavator

JCB is expanding its X-Series range of crawler excavators with the launch of the new range-topping 50-tonne class 520X. The unveiling completes JCB’s Heavyline crawler excavator range which already comprises the 370X and 420X models.

Key features of the 520X include:

• Cummins X12 diesel engine delivering 298kW (400hp)
• JCB CommandPlus cab with intuitive JCB UX user interface
• Range of arm and boom configurations available to suit the customer
• Variable gauge undercarriage option offered

Heavy duty performer

The 520X takes JCB’s X-Series tracked excavator range into a new market segment, with an operating weight of 52-57 tonnes, depending on build specification. The machine can be configured with a standard 6.9 metre (m) boom for maximum versatility, or a 6.5 m mass excavation boom for customers focused on the highest output. 

A 2.55 m or 3.0 m heavy-duty arm is available on the 6.5 m mass excavation boom, while a 3.0 m or 3.3 m arm can be fitted to the 6.9 m reach boom. The machine is capable of handling buckets in the 2.8-3.4 m3 range, depending on specification.

Maximum digging reach is 11.8 m with the reach boom and longer arm, with a maximum digging depth of 7.8 m. Maximum dump height is 7.5 m, making the machine an ideal match for a range of duty cycles and applications. The 520X boasts a dipper tearout force of up to 279kN, while bucket tearout is as high as 318kN.

The machine is powered by a Cummins X12 diesel engine. Designed to provide a strong power-to-weight performance, the X12 offers the response and power of a larger engine, while maximising fuel efficiency. The 11.8-litre engine delivers 298kW (400hp) at 1,800rpm, with a sturdy 1,969Nm of torque available at just 1,400rpm, providing plenty of low-down excavating capability and the potential for impressive tonnes-per-litre productivity.

The engine drives twin variable displacement axial piston hydraulic pumps, producing a substantial 404 l/min each of hydraulic flow. The latest-generation Japanese hydraulic system has been tuned for maximum efficiency, with latest generation hydraulics, larger diameter pipework and a hydraulically-driven cooling fan reducing fuel consumption. A dual slew motor system delivers competitive cycle times, for maximum digging and loading performance.

In standard Earthmoving Pro specification, the machine boasts two heavy-duty undercarriage options, a fixed 2,740 mm track gauge or a mechanically adjustable variable width track of 2,390 mm to 2,890 mm. Customers can specify 600-900 mm track pads, to suit their individual site conditions and transport requirements and there are two counterweight options, a fixed 10.5-tonne weight and a hydraulically-removable 9.8-tonne counterweight.

For maximum durability and performance, there is an optional Heavy-Duty Pro Pack specification, that includes additional side impact protection plates, heavy-duty belly plates, bucket ram guards and working light guards. Both the Earthmoving Pro and Heavy-Duty Pro models can be ordered with foldable side walkways for maintenance and easier service access.

Operator control

All X-Series machines benefit from JCB’s spacious CommandPlus cab, which delivers next-level operator comfort and safety. Constructed with premium materials, all legislated Heavyline machines are built in range-topping Pro specification as standard, with a heated and ventilated operator’s seat, complete with electric lumbar adjustment.

The JCB UX user interface is also standard, incorporating a 10” full colour touchscreen monitor, that can be customised to suit the individual operator’s preferences. Operators can set bespoke hotkeys, to allow rapid access to regularly used functions. JCB has introduced keyless start on the X-Series, with a short press of the button turning the display on or off. The monitor allows operators to create up to 25 user profiles, to save preferred customised joystick and switch choices.

The 520X cab is ROPS certified as standard and features JCB’s 2-Go hydraulic isolation system, for increased safety in any application. A high-definition 360 camera is fitted as standard and is seamlessly integrated into the new UX display, while 14 LED working lights deliver excellent visibility in all prevailing lighting conditions.

Standard JCB LiveLink telematics monitoring provides real-time data from the machine. Customers can access a wide range of information, including fuel consumption, idling times and fuel levels. Service warnings and maintenance requirements allow rapid diagnostics and ensure timely service work is carried out. The system also delivers improved security, with remote geolocation functions. 

The 520X benefits from JCB’s renowned service and parts back-up, available through a network of dedicated dealers capable of providing on-site support. Pre-planned machine maintenance, on-site and in-depot machine repair and world-class parts supply ensure minimum downtime and maximum productivity in heavy-duty applications.