JCB is adding to its range of midi-excavators with four new models in the 4.8 to 5.7 tonne range, available in conventional, reduced and zero tailswing configurations.
The new machines follow the introduction of next generation 6, 8, 9 and 10 tonne midi-excavators last year.
UK-based JCB said that key features of the new models included 500-hour greasing intervals, improved cab instrumentation, a 9% boost to bucket tearout, 5% additional dump height, and 2% more powerful bucket tearout force.
It added that there was an 18% increase in 57C operator’s cab capacity, and 11% improvement in visibility.
The new 48Z-1 replaces the previous 8045Z/8050ZTS, while the 51R-1 – which JCB said would be particularly popular with rental customers – will replace the 8050ZTS/RTS. The 55Z-1 takes over from the 8055ZTS/RTS, but the 57C-1 is a completely new model.
'Attention to detail'
Tim Burnhope, chief innovation and growth officer, said there had been “an incredible attention to detail” with input from customers and operators.
He added that the new machines shared the same DNA as the new generation models already launched. He said all four new machines shared the durable design of the larger machines, with 100% steel bodywork and a sturdy four-plate dipper arm construction.
The dig end is 100% bushed, which JCB said led to extending the greasing intervals to 500 hours. It has also revised the pin pick-up points to work with a number of competitive bucket brands, while optional hydraulic or manual quickhitches can be specified for faster attachment changeover.
JCB has developed a new range of ECO buckets, with a redesigned profile aimed at easier filling and improved material retention.
The excavators feature a redesigned dig end, with a longer main boom and shorter dipper arm, which JCB said would provide up to 5% greater dump height for easier truck and site dumper loading. The upgraded hydraulic system also delivers up to 9% more bucket tearout force, it said, and 2% higher dipper arm tearout.
The excavators feature an improved operator’s cab, with the 57C-1 using the same structure as the larger 10 tonne machine. The cab is 18% more spacious and offers up to 11% more visibility.
JCB claimed that even in reduced and zero tailswing configurations, its midi-excavators delivered impressive levels of comfort for the driver, with reduced noise and vibration levels and easily-replaced flat glazing throughout.
It said the biggest development in the cab was the adoption of a new display screen and control system, with an automotive style rotary controller allowing easy access to systems and information.
Another innovation is the inclusion of an optional Safe Lift feature, complete with an integral Lift Overload warning system.
Claiming that it was an industry first at this weight, Safe Lift incorporates a green-amber-red graphic in the new monitor panel, with an audible warning that sounds if the machine approaches overload. The Safe Lift feature is included as standard when hose burst check valves have been specified.
There is also an electro-hydraulic dozer control lever, with up to three buttons in the head to control two-speed tracking, dozer float and a four-way adjustable dozer blade where fitted.
The new machines will make their debut at the UK’s Executive Hire Show from 10 to 11 February, and then at Bauma in Munich, Germany, in April. They will go into full production in March.