The Cat 553C wheeled feller buncher is the third model in the C series line-up.The 553C and 573C were launched towards the end of 2011. The new 553C contains all the advancements found in the first two models, but has a different engine. It is equipped with the 174 hp (130 kW) Cat C6.6 ACERT engine, while the 563C and 573C are equipped with the Cat C7.1 ACERT engine. The 563C has wheelbase of 2,794 mm (110 in) and weighs 13,862 kg (30,560 lb).
The C Series machines have been designed to be more versatile than previous models. They have a longer wheel base and new engine position, which improves stability. Machine width has been maintained which provides a tighter turning radius for good manoeuvrability in thinning. Caterpillar indicate that fuel consumption is better than previous models due to power only being delivered where and when it is needed due to a new technology called PowerDirect Plus. This results in better performance from all functions on both flat and steep slopes. Cat also claim that simultaneous lift-tilt and lift-steer functions are faster than their major competitors, and saw recovery time is also faster.
Other general areas of improvement in the C Series are ground level servicing, a high performance hydraulic control valve, pressurised and separated engine compartments to keep debris from entering, and an improved cab for operator ergonomics. Source: www.cat.com