Retarding performance, Speed continuous grade length – Milton CAT 770 User Manual
Page 27
27
770 Off-Highway Truck specifications
0
5
10
15
20
25
30
35
40
45
km/h
mph
kg x 1000
L
E
Effective
Grade
(Grade Minus Roll
ing Resistance)
Gross Weight
lb x 1000
25%
5%
10%
15%
20%
30%
Speed
Continuous Grade Length
0
50
25
100
75
125
150
175
0
10
20
30
40
50
60
70
80
0
10
20
30
40
50
60
70
80
5
15
25
35
45
55
65
75
2
3
4
5
6
7
1
To determine retarding performance: Add lengths of all
downhill segments and, using this total, refer to proper
retarding chart. Read from gross weight down to the percent
effective grade. Effective grade equals actual % grade minus
1% for each 10 kg/t (20 lb/ton) of rolling resistance. From this
weight-effective grade point, read horizontally to the curve
with the highest obtainable gear, then down to maximum
descent speed brakes can properly handle without exceeding
With ARC Only
ARC and Engine Brake
E – Typical Field Empty Weight
L – Target Gross Machine Operating Weight 71 214 kg (157,000 lb)
cooling capacity. The following charts are based on these
conditions: 32
° C (90° F) ambient temperature, at sea level,
with 18.00R33 tires.
NOTE: Select the proper gear to maintain engine rpm at the highest
possible level, without overspeeding the engine. If cooling oil
overheats, reduce ground speed to allow transmission to shift to
the next lower speed range.
Retarding Performance