A contractor is using a D8R Crawler Tractor for land clearing application (medium fuel consumption). Minimal ripping will be required to loosen material. It will be operating on Non-penetrable hard surfaces with 150 mm (6") or higher bumps, slightly or intermittently damp soils containing a low proportion of hard, angular or sharp particles?with the following information.

• Initial Cost with the delivery cost: $105,000
• Expected life: 8 years
• Expected usage (hours/year): 900 hrs.
• Salvage value: $35,000
• Interest rate is 5%
• Insurance is 1%
• Taxes are 2%
• Fuel cost is $2.4/gal
• Lube oils, fillers and grease service is expected every 100 hours and cost $370/service
• Z factor= 0.7 (between moderate and high)
• The repair cost is $8.50/hour
• Special wear items: Set of teeth for $1,000 which will have to be replaced every 520 hrs
• Operator?s hourly wage is $65/hour

Please calculate the average hourly fuel consumption based on the following table.

Select one:

a. 7.25

b. 9.05

c. 9.75

d. 12.25

FUEL CONSUMPTION TABLES AND LOAD FACTOR GUIDES TRACK-TYPE TRACTORS Model Low Medium High liter U.S. gal liter U.S. gal liter U.S. gal D3K2 7.6 2.0 8.7 2.3 15.5 4.1 D4K23 8.3 2.2 9.5 2.5 15.9 4.2 D5K2 8.7 2.3 9.9 2.6 16.7 4.4 D3K2' 6.8 1.8 7.6 2.0 15.2 4.0 D4K2' 7.6 2.0 8.3 2.2 15.5 4.1 D5K2' 8.0 2.1 8.7 2.3 15.9 4.2 D6K23 9.1-12.0 2.4-3.2 12.0-16.6 3.2-4.4 16.6-22.9 4.4-6.1 D6K2' 7.9-10.4 2.1-2.7 10.4-14.4 2.7-3.8 14.4-19.8 3.8-5.2 D5R23 11.7-14.6 3.1-3.9 14.6-19.4 3.9-5.1 19.4-25.6 5.1-6.8 D6N' 8.9-12.0 2.4-3.2 12.0-15.8 3.2-4.2 15.8-22.4 4.2-5.9 13.2-18.9 D6R (130 kW/175 hp) D6R (145 kW/195 hp) 3.5-5.0 18.9-24.6 5.0-6.5 24.6-30.3 6.5-8.0 14.8-21.2 3.9-5.6 21.2-27.3 5.6-7.2 27.3-33.7 7.2-8.9 D6T (138 kW/185 hp) 15.5-22.3 4.1-5.9 22.3-28.8 5.9-7.6 28.8-35.6 7.6-9.4 D6T' 15.0-21.3 4.0-5.6 21.3-27.7 5.6-7.3 27.7-34.0 7.3-9.0 D7E' 13.6-19.3 3.6-5.1 19.3-25.2 5.1-6.7 25.2-31.8 6.7-8.4 D7R 17.8-24.4 4.7-6.5 24.4-31.0 6.5-8.2 31.0-37.6 8.2-9.9 D8R 22.5-32.0 6.0-8.5 32.0-41.5 8.5-11.0 41.5-51.0 11.0-13.5 D8T3 23.5-33.7 6.2-8.9 33.7-43.5 8.9-11.5 43.9-53.7 11.6-14.2 D8T' 23.7-34.3 6.3-9.1 34.3-44.2 9.1-11.7 44.1-54.2 11.7-14.3 D9T3 30.3-43.1 8.0-11.4 43.1-56.4 11.4-14.9 56.4-69.3 14.9-18.3 D9T 28.2-40.1 7.4-10.6 40.1-52.5 10.6-13.9 52.5-64.4 13.9-17.0 D9T' 31.2-44.4 8.2-11.7 44.4-58.1 11.7-15.3 58.1-71.4 15.3-18.9 D10T25 39.5-56.3 10.4-14.9 56.3-73.3 14.9-19.4 73.3-90.2 19.4-23.9 D10T25 43.0-61.3 11.4-16.3 61.3-79.8 16.3-21.1 79.8-98.2 21.1-26.0 D11T 59.6-85.2 15.8-22.5 85.2-110.7 22.5-29.3 110.7-136.3 29.3-36.0 D11T5 60.3-86.1 15.9-22.8 86.1-112.0 22.8-29.6 112.0-137.8 29.6-36.4 'Meets U.S. EPA Tier 4 Final/EU Stage IV/Japan 2014 (Tier 4 Final) emission standards Calculations include DEF. *Meets Tier 4 Interim/Stage IIB/Japan 2011 (Tier 4 Interim) equivalent emission standards. *Meets Tier 3/Stage IlIIA/Japan 2006 (Tier 3) equivalent emission standards. *Meets Tier 2/Stage II/Japan 2001(Tier 2) equivalent emission standards. *Meets Tier 4 Final emission standards. *Meets Tier 2 equivalent emission standards.