Caterpillar downsized the engine in its 3.5-tonne 303.5E2 mini excavator to 23.5 hp to cut the machine’s emissions-compliance cost, and upgraded to an electronically controlled hydraulic pump to ...

upsizing hydraulic pumps so the 25-ton hoe can work as hard as the 320E it replaces at 10% better fuel efficiency Caterpillar reduced rated high-idle speed in the new 323F L excavator to 1,500 rpm ...