Cat Stage II products

"Caterpillar have recently introduced new models in the 130–560kW power classes that meet the EU Stage II emissions regulations. The new machines feature advanced, electronically controlled diesel engines and include the first models in the new 300C family of hydraulic excavators and five new Series II mid-size wheel loaders."

"Caterpillar say that by using these advanced engines they are meeting the challenge of maintaining machine performance, fuel efficiency and reliability, while at the same time lowering exhaust emissions. The engines feature the ADEM III Electronic Control Module (ECM) which continuously monitors key performance parameters and adjusts engine operation to ensure optimum performance in all conditions, while ensuring that exhaust emissions are always kept within set limits. The ECM also allows the integration of all engine/transmission controls to maximize system efficiency and protect against operator abuse. Mechanically actuated or hydraulically actuated electronic unit injectors improve fuel atomization and match fuel input to performance demands."

Air-to-air aftercooling (ATAAC) uses ambient or outside air to cool intake air after it has passed through the turbocharger and before it enters the combustion chambers. The cooler fuel/air mixture burns more efficiently with significantly reduced emissions. This technology also increases the engine’s effective power density by around 10%.

Advanced diagnostics and prognostics provide the facility for more effective service response.

"While all Cat machines in the 130–560kW power classes will receive new emissions-compliant engines, attention is focused on the first models in the 300C family of hydraulic excavators. The first model, powered by a Cat 3126B ATAAC diesel engine, is the 25/30-tonne class 325C which offers:"

• improved productivity and versatility from its more powerful engine, increased hydraulic performance and the new ‘tool control’ system
• improved operator comfort with a new cab layout, larger glass area and Multi-Pro joystick controls
• enhanced reliability and durability following the introduction of grease-lubricated tracks and optional heavy-duty front linkage
• simplified service and maintenance, extended oil change intervals and the new Cat Data Product Link maintenance-monitoring system.

"The 325C is offered with a choice of undercarriage configurations, booms and sticks, and a wide range of job-matched buckets and work tools."

"Competing in the 134–231kW power classes, Caterpillar’s five new mid-size wheel loaders (950G Series II through to the 980G Series II) feature full electronic integration of their engines, transmissions and implement circuits. Other enhancements include an improved cooling system, a new cab with a wider front windscreen, a new seat, an improved air-conditioning system and a new instrument panel with the latest EMS III electronic monitoring system. The Series II versions of the 950G, 962G, 966G, 972G and 980G are offered with a range of bucket capacities from 2.9–5.7m3."