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Page 44 Contractors World Vol 3 No 2

developing economies, which are not subject to the more stringent US or European engine emissions legislation. JCB has also announced that the 4.8 litre Stage 2/Tier 2 JCB Dieselmax engine wi l l power al l 20–22 tonnes JS excavators destined for these markets.

While engine power rating remains at 128 Kw (172 hp), JCB has made a number of key changes , i n pa r t i cu l a r incorporating new advanced

hydraulic technology, with optmised pump setngs and revised spool confguraton. JCB has also modifed the Advanced Management System to ensure that the excavator defaults to Economy mode on start-up.

Because of the incorporaton of the same advanced hydraulic technology on Tier 2 machines fuel efciency improves by 11% on each of these Tier 3 models with no engine modifcaton. So, a Britsh customer working a JS200 for 1,500 hours per year will save £2,750 compared with the previous model.

First JS Excavators with Tier IV Engines

Fuel efciency on the new Tier 4 interim JS240 (24 tonnes), JS260 (26 tonnes), JS330 (33 tonnes) and JS360 (36 tonnes) improves by 8%. These are the frst JS models to move up to Stage 3B/Tier 4 Interim compliance.

Tier 4i compliance has been achieved by using Isuzu engines and by incorporatng a variable geometry turbocharger, exhaust gas recirculaton and a diesel partculate flter.

New cab across the range

JCB is introducing a new cab across its range of JS excavators and among one of the most important changes is on the front windscreen with the split between the top secton and botom secton of glass now 125 mm lower in response to customer feedback. It’s now a 70/30 split, providing the operator with much improved visibility of the digging area. A positve seal has also been created between the top and botom sectons, resultng in zero dust ingress into the cab. The botom secton of glass can be removed easily and conveniently stored within the rear window stowage area, again improving visibility to the digging area.

The front upper corner of the cab has been shifed forwards to accommodate a fat glass panel, instead of curved glass. This makes replacement much easier and less costly. Both the upper and lower sectons of glass are laminated for additonal protecton and scratch resistance, as is the new roof glazing, which was previously polycarbonate.

JCB’s new cab also focuses heavily on the structure, which is becoming increasingly important for customers, in partcular Roll Over Protecton (ROPS). While legislaton doesn’t currently make ROPS mandatory, JCB is making ROPS protecton available on all JS excavators.

For all models below 24 tonnes, ROPS will be integral to the cab – achieved through internal strengthening of the cab and machine structure. Externally, the ROPS cab will look the same as the non-ROPS cab, however a data plate inside the cab will highlight to the operator that it is the ROPS-protected version. For all models over 24 tonnes, a bolt-on ROPS cage will be fted on to the machine.

Falling Objects Protecton (FOPS) is equally important to JCB customers, partcularly in the demoliton sector and FOPS protecton is available for all models for both front screen and roof screen. This can be factory-fted or retro-fted without the need to make any modifcatons to the cab structure

Click here for more informaton >>> JCB Wheel Loaders

JCB JS Excavators JCB Access Platorms JCB - Other Intermat introductons

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