Komatsu America Corp.’s high capacity C144 harvesting head is the second model in its new C-series family of “carry-style” heads (the C93 was the first). Weighing 3,086 lbs. (1,400 kg), the high performance C144 has a recommended DBH working range of 8 in. (20 cm) to 20 in. (50 cm) diameter and has a 28 in. (71 cm) maximum cutting diameter. It is available installed on Komatsu 931.1 and 941.1 harvesters, and can be installed on other carriers as a loose head.
The C144 features a new robust frame design for improved durability and reliability, and a new swing damping system for more responsive head control. The 40 degree rearward tilt angle provides fast feeding performance and reduces head frame stress when harvesting and/or reaching on downhill slopes. The feed system is completely new utilizing four hydraulic motors and four driven rollers. The standard single belly roller is now supplemented by an additional feed roller located in the feed path. The addition of the second roller ensures more contact with the stem, creating feeding force of up to 6,654 ft. lb. (29.6 kN). With a maximum feed speed up to 16.4 ft./sec. (5 m/sec), operators can handle more difficult trees and limbs. The feed roller hydraulic circuit has a differential function to ensure that stem feeding will continue even if one feed roller does not have a full grip on the stem, according to the manufacturer.
The C144 is equipped with two upper and two lower hydraulically controlled delimbing knives, and a fixed vertical top knife. The upper knives are specially designed to handle trees with tough limbs, such as lodgepole pine. The leading right upper knife has a ramped cutting edge to assist in cutting larger branches.
The new Constant Cut saw control system features a 32.5 in. (82.5 cm) saw bar that includes a new 19cc saw motor with an integrated valve to deliver precise control of saw hydraulic flow and pressure. This continuous management of flow and pressure allows the chain speed to be maintained at a constant 130 ft./sec. (40 m/sec) throughout the entire cutting cycle. This Constant Cut system, along with automatic chain tensioning and automatic EcoOiler chain oiling results in:
• Faster cutting performance
• Reduced fuel consumption
• Reduced chance of splitting and/or cracking
• Reduced saw maintenance
• Longer saw motor life.
Optional stump treatment and color marking systems are available to meet specific customer needs.
Komatsu’s new MaxiXplorer 3.1 head control system is standard and provides a flexible and user-friendly control and monitoring system. When installed on a Komatsu harvester, it is a complete system for machine control, head control, crosscutting and administration. Machine productivity is optimized by controlling everything from the head to the crane, cab leveling, transmission and ladders.
All grease servicing points, bar oil and color marking tank fill points are accessible from one position when the head is parked on the ground. Electrical circuits are identified by numerical tags, and all solenoids have LED indicator lights identifying when power is at the solenoid.
For more information, visit www.komatsuforest.us.
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