771D Quarry Truck

3. From the intersection of the gross weight and effectivegrade line point, read horizontally to the appropriate gearcurve. the horizontal line intersects two gear curves, choosethe first gear curve that the horizontal line intersects(reading from right to left) and read the retarding speedperformance immediately below this point. If theintersection point falls on a vertical line between two gears,choose the lowest of the two gears to allow for higherengine rpm thus maximizing brake cooling capability.4. Adjust recommended retarding speeds to site specific(environmental and operational) conditions. If the brakesystem overheats or specific site conditions dictate(tight turns, short steep grades, manual braking, etc.),reduce ground speed to allow the transmission to shiftto the next lower speed range.Gross Weight0 10 20 30 40 50 60 70 80 kg x 100030%125%20%Gross Weight0 10 20 30 40 50 60 70 80 kg x 100030%25%120%2345615%10%5%Effective Grade (Favorable)2345615%0%5%Effective Grade (Favorable)0 10 20 30 40 50 60 70 80 km/hSpeedGrade Distance – 450 m0 10 20 30 40 50 60 70 80 km/hSpeedGrade Distance – 600 mGross Weight0 10 20 30 40 50 60 70 80 kg x 1000Gross Weight0 10 20 30 40 50 60 70 80 kg x 100030%25%20%30%25%20%12345615%10%5%Effective Grade (Favorable)12345615%10%5%Effective Grade (Favorable)0 10 20 30 40 50 60 70 80 km/hSpeedGrade Distance – 900 m0 10 20 30 40 50 60 70 80 km/hSpeedGrade Distance – 1500 m771D Quarry Truck specifications21