Caterpillar Performance Handbook, January 2017, SEBD0351-47
621K Retarding ● 33.25R29Tires
Wheel Tractor-Scrapers
GROSSWEIGHT
0
20
40
60
80
100
110
120
160
lb x 1000
10
20
30
40
50
60
70
80
0
kg x 1000
L
30%
E
25%
20%
15%
3
4
10%
5
high medium
EFFECTIVE GRADE
6
low
7
5%
8
(Grade minus Rolling Resistance)
Compression Braking Level
5
10
15
20
25
30
35
40
45
50
55
60
0
km/h
0
5
10
15
20
25
30
35
mph
SPEED
*at sea level
KEY 3 — 3rd Gear Direct Drive 4 — 4th Gear Direct Drive 5 — 5th Gear Direct Drive 6 — 6th Gear Direct Drive 7 — 7th Gear Direct Drive 8 — 8th Gear Direct Drive
KEY E — Empty 35 808 kg (78,943 lb) L — Loaded 61 935 kg (136,553 lb)
24-20 Edition 47
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