JCB has unveiled the first models in the next generation of JCB tracked machines for the global construction market. The new 20-tonne class 220X crawler excavators feature 15% larger global cab with integral ROPS structure, 200mm wider upper structure, central main boom mounting, ergonomically-designed cab and stronger side doors. In addition, the 220X boasts a 68dB(A) noise level inside the operator’s cab, down from 73dB(A) on the previous generation.
The excavators have an upper structure that is now a full 2.7m wide, 200mm broader than their predecessors. The additional space has allowed JCB’s designers to mount the main boom in the centre of the machine, rather than at an offset. This reduces stress on the slew bearing and provides increased accuracy for the operator when trenching. It also permits the use of larger buckets without impacting the tracks.
The company has stayed with proven Kawasaki hydraulic pumps and Kayaba valves, but has opted for larger spools and a latest generation valve block for reduced hydraulic losses. The diameter of the main hydraulic hose to and from the main hydraulic valve has increased in diameter from 19-25mm, giving greater flow without increasing the speed of the oil.
Although the boom and arm are unchanged, JCB will offer the option of boom float with two modes to make grading easier and to reduce stress when operating a hydraulic breaker. The bucket ram will be available with an optional hose burst check valve and the grease points in the boom and arm have been grouped together to reduce service time.
Over a four-year development period, JCB employed a programme of intensive component and product testing; for the first time, JCB put the entire 20-tonne excavator on an automotive-style shaker rig. The company has changed the way it builds excavators, with 42% of the machine now constructed as sub-assemblies off the main line, double the previous amount. This allows for additional quality inspections and reliability checks, while simplifying the main line.
Tim Burnhope, chief innovation and growth officer, JCB, said: “With the next generation 220X, JCB has moved to a totally new level of product development and machine assembly. We have made it easier for the operator and for the service technician, reducing downtime for the customer and boosting profitability. The 220X heralds the arrival of a new generation of JCB excavators, which will provide many years of faithful service across the world.”
