Engine

Gradeability/Speed/Rimpull
To determine gradeability performance: Read from gross
weight down to the percent of total resistance. Total resistance
equals actual percent grade plus 1% for each 10 kg/t (20 lb/ton)
of rolling resistance. From this weight-resistance point, read
horizontally to the curve with the highest obtainable gear, then
down to maximum speed. Usable rimpull will depend upon
traction available and weight on drive wheels.
With ARC Only
ARC and Engine Brake
E – Typical Field Empty Weight
L – Target Gross Machine Operating Weight 100 698 kg (222,000 lb)
Gross Weight
0 50 100 150 200 250
lb x 1000
Rimpull
lb x
1000
110
100
90
80
70
60
50
40
30
20
10
0
kg x
0 15 30 45 60 75 90 105 120 kg x 1000
1000
50
E
L
45
40
35
30
25
20
15
10
5
1st Gear
1st Gear
2nd Gear
3rd Gear
Torque Converter Drive
Direct Drive
4th Gear
5th Gear
6th Gear
30%
25%
20%
15%
10%
5%
7th Gear
0
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80
Total Resistance
(Grade plus Rolling)
km/h
0 5 10 15 20 25 30 35 40 45
Speed
mph
773F Off-Highway Truck specifications
25