D6 CRAWLER SKIDDER Machine information summary

A D6 Crawler skidder is a machine that takes trees from the felling site to the landing where they are dumped. In addition, it can also help build primary roads prior to harvesting as well as secondary skid roads during harvesting.

• Firm soils(i.e. with good ground bearing strength)
• Moderate slopes (0 - 45%)
• Good for areas that might need secondary skidding roads cleared out.

• 32.1m3/PMH @ 55m forwarding distance & 0.42m3/log Wood Harvesting TN-218,1994
• 18000kg @ 1km/h, CAT Track Skidders pamphlet, Atlantic Tractors,1996
• 12500kg @ 4km/h, CAT Track Skidders pamphlet, Atlantic Tractors,1996
• 2000kg @ 10km/h, CAT Track Skidders pamphlet, Atlantic Tractors,1996

• Mechanical Availability : 93.6%
• Machine Utilization Rate: 89.6%

Purchase

• $310,000 / unit, 1994 WOOD HARVESTING, FERIC Report

• $/h (Rental Rate) = $97.97
• $/m3 (unit cost) = 97.97$/PMH/32.1m3/PMH= $3.05/PMH
• Repair and maintenance cost = $20.07/h
• Repair and maintenance parts = 100% off purchase price over 10,000 PMH (TN-218)

• 1 highly skilled operator per machine

• Fuel consumption : 21.3 litres/hour
• Danger of soil compaction due to weight, especially on wet or poor bearing soils.

• Makes large piles at roadside that are good for delimber productivity
• Leaves site clean for planting activities

Forrester,P.D. 1993. Observations of Two Skylead C40 Cable Yarders. For. Eng. Res. Inst. Can., Tech. Note. TN-201.

Kockx,De Long 1994. Return-Trail Skidding : Pilot Study For. Eng. Res. Inst. Can., Tech. Note. TN-218

CAT Track Skidders pamphlet, Atlantic Tractors,1996.