Feed roller design has been focussed on for improved productivity.
The feed rollers have concave ridges for many points of contact between the stem and the feed rollers. The head's gripping force can be kept low with retained feed force and low energy consumption. The feed rollers also contribute to effective and reliable measuring. The C123 uses cast delimbing knives, which provide good durability, high lifting capacity, and firm stem holding.
The new head uses a Constant Cut saw unit, which produces the correct cutting speed throughout the entire cutting cycle. There is no risk of running the chain too fast, thereby increasing productivity and minimizing chain shot and splitting risks. The head is also claimed to be a good choice for steep terrain with its use of a robust frame design and an extra-large tilt angle. Customers also have the opportunity to add the optional multi-tree accumulator to increase productivity further.
The C123 can be supplied with the Eco-GLS chain and bar lubrication system. This reduces the oil mist surrounding the machine and ensures good lubrication is achieved with a small amount of lubricant. The oil mist around the machine affects the frequency at which the windows, radiator, and other machine parts need to be cleaned. Source: http://www.komatsuforest.com/default.aspx?id=1848&newsid=148818