mercury

Thank you for your input to date. Some more info to "percolate " on.<br /><br />Truck runs at 65 miles per hour ( governed) @1650rpm, 35 psi boost, and 90 psi in fuel rail.<br /><br />GVW is 55,000kg (120,000#) , Tare weight is 29500kg ((65000#)<br /><br />EGR cooler was blocked, repaired and EGR replaced, valves and rocker arm bolts - 1 year ago<br /><br />Turbo replaced, manifold bolts replaced, 4 new stock injectors, new lift pump - 4 months ago.<br /><br />Fuel economy from previous calculations, which I do not trust, was 4.5miles /US gallon. Working on getting some good data.<br /><br />Remember, the truck is loaded to destination, then empty on return, so fuel economy is an average. 235 miles each way<br /><br />We are intent on getting the best out of this unit, as we have 2 years to go. We appreciate all your comments and would love to hear about your thoughts for improvement, and also what mileage we should expect with a load like this. Would like to hear what other similar rigs / different tractors get for fuel economy<br /><br />Thanks Mercury

This tractor pulls 50,000# garbage to landfill, 470 miles return. Fuel economy is not great, and driver complains that he has to drop gears to get up hills, it doesn't seem to have power. Specs on truck - Engine AC460P -ASET 460 hp- TRANSMISSION - 18 SP FULLER - RTL-016918B- Rear axle - RT46-164EH - 4.10- Suspension - AL461 60" SPACING- Front tire size - 12R22.5 , 484 revs per mile- rear tire size - 11R22.5, 495 revs per mile- top gear ratio - .73 ratioIt has 168,000 miles, and 8700 hours. Lots of hours to pack garbage in compacting trailer with wetline . Recent new EGR, manifold bolts, injectors, turbo, and reflash by Mack dealer. Doesn't make a big difference. We just can't believe this truck can't do better. We think it's just short on enough power, and would love to get better economy. I am asking the forum, what experience do they have with these tractors, how to boost them up, and what kind of fuel economy should we expect? Any thoughts would be appreciated. Thanks Mercury