JCB is preparing to offer Stage V compliant engines across its equipment lines, with updates to its own engine range and changes to supplier models. Group director of engines Alan Tolley said that the company has preferred to tackle emissions within the combustion system, rather than simply adding aftertreatment to the exhaust system; however, for Stage V, diesel particulate filters (DPFs) and selective catalytic reduction (SCR) will become necessary.
“Stage V calls for a further reduction in particulate matter, but it has been our focus for a long time,” said Tolley. “JCB fully believes that diesel engines will continue to play a major role in powering construction equipment for the foreseeable future.”
The company’s smallest engine, the 3.0-L 430 Dieselmax, delivers 55 kW (74 hp) and 440 Nm (325 lb-ft) at 1,150 rpm. The engine, which is fitted to many of the company’s Loadall telescopic handlers, its backhoe loaders and large platform skid steer and compact tracked loaders, is equipped with a “one-can” DPF/DOC (diesel oxidation catalyst). The 430 has hydraulic valve lash adjusters and a sealed-for-life crankcase ventilation module, eliminating filter replacement. It also boasts auto-stop technology to further reduce emissions. Service intervals remain at 500 hours.
Higher up the power range, JCB has opted for a 210-kW (282-hp) Cummins QSB6.7 diesel engine to power its 457 wheeled loading shovel in Stage V countries. Operators will be able to choose between two power modes from within the cab, reducing engine output to 167 kW (224 hp) in lighter duties to cut fuel consumption and emissions. The machine will also now be equipped as standard with a five-speed Powershift transmission, instead of the previous four-speed unit.
“Telematics tell us that many machines around the world are only running at part load, so we have designed power modes onto the machines,” said Joe Eddlestone, wheeled loader product marketing manager.
The Cummins engine will be equipped with an auto shutdown feature and the combination of the new engine and transmission will deliver a claimed 10% improvement in fuel consumption. A wide-core cooling pack, previously an option on the 457, will become standard on the Cummins-powered loader.
The 457 will continue to be powered by a 192-kW (258-hp) MTU engine in Tier 4 Final territories such as North America, as the MTU engine meets the emissions standard without the use of a DPF.
JCB will also use Stage V Cummins engines in its 437 and 427 models. The 437 gets a power boost at Stage V, from 136 to 145 kW (183 to 195 hp). The 427 will be equipped with a 123-kW (165-hp) Cummins motor. Both machines also adopt a five-speed Powershift transmission and auto shutdown, while the 437 also comes with a low power mode.
The smaller 407 and 409 loaders will continue to use JCB Diesel by Kohler engines to meet Stage V, though now with the addition of a DPF. Power outputs are unchanged, though auto shutdown has now been included. The 407 will also come with a “whisper quiet” Rexroth hydraulic pump to reduce overall noise levels. An Eco Drive Mode has also been incorporated in the hydrostatic driveline, to make up to a 16% fuel saving at higher speeds.
For the smallest 403 model, JCB will offer a choice of the current 26-kW (36-hp) engine, alongside a Smart Power 19-kW (25-hp) version, for those customers seeking ultimate fuel economy.Continue reading »