The Urus III 300 UNI 3T is a new guy-less cable yarder on the market, and uses a modified construction excavator as a carrier.The new yarder from Hin-Tech can be configured as a high-lead or skyline. No guylines are required for the yarder as it is self-stabilising due to its weight, which significantly reduces set-up times. Due to it being a tracked machine, the Urus III is completely mobile and can move around on the landing and even travel short distances between felling areas. The Urus III is available using a 20 ton or 30 ton excavator as the carrier. When the 20 tonne excavator is chosen, the boom bucket remains to provide extra stability, while the 30 tonne machine is equipped with a grapple.
The operator uses joysticks in the cab to operate the winches. The joysticks use pilot pressure to control the winch motor. The joysticks are mounted onto a swing-arm that can be moved out of the way when the winching functions are not used. Each main and haulback line drum is fitted with a disc brake. The brake callipers are hydraulically controlled by foot pedals mounted next to the excavators drive pedals in the cab.
The hydraulic motors for the mainline and haulback line are individually controlled. The cable yarder has been designed to allow the haulback line drum to be uses as a skyline when equipped with the correct cable. To tension the skyline cable, the motor is winched slowly until the correct cable tension is reached. A cylinder is then engaged via a switch in the cab to lock a ratchet plate in place, which keeps the skyline safely tensioned. The table below provides some of the Urus III specifications:
| Engine | Power from existing excavator. Approximately 110 kW (150 hp) is required |
| Pump | From existing excavator. Approximately 350 bar and 410 l/min is needed |
| Hydraulic motors | Mainline: Sauer Danfoss 250 cc variable displacement Haulback: Sauer Danfoss 160 cc variable displacement |
| Cables | Mainline: 320 m (350 yd), 13 mm (0.51 in) dia, 6 x 19 IWRC Haulback: 640 m (700 yd), 10 mm (0.39 in) dia, 6 x 19 IWRC |
| Line speed | 3 m/sec (9.8 ft/sec) loaded and 5 m/sec (16 ft/sec) empty |
| Breakout | 6 t breakout power |
| Pulling | 3 t continuous pulling |
| Production | Approximately 170 t per day based on a clear-cut harvesting operation and optimum conditions & a tree size of minimum 0.35 – 0.40 cubic meter / tree |
Source: http://www.urus-hinteregger.com/index.php?option=com_content&view=article&id=140&Itemid=463