MacDon R80 Rotary Disc - Manual (Page 31)

OPERATION
Form # 169089
29
Model Year - 2009
6.12.8 Ground Speed
CAUTION
Reduce speed when turning, crossing
slopes, or when travelling over rough
ground.
a. Choose a ground speed that allows the cutterbar
and conditioner to cut the crop smoothly and
evenly. Try different combinations of header
speed and ground speed to suit your specific
crop. Refer to M150/M200 Self-Propelled
Windrower Operator’s Manual for changing
ground speed.
b. In tough cutting conditions, such as native
grasses, the disc speed will need to be
increased.
c. In light crops the header speed can be reduced
while maintaining ground speed.
NOTE
Operating the header at the minimum disc
speed will extend the wear life of cutting
components.
d. The chart below indicates the relationship
between ground speed and area cut for two
header sizes.
Example: At ground speed of 13 mph (21 km/h) with
a 16 ft. header, the area cut would be approximately
25 acres (10 hectares) per hour.
0
5
10
15
20
25
30
35
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
miles/hour
ac
re
s/
h
our
0
2
4
6
8
10
12
14
1.6 3.2 4.8 6.4 8.0 9.7 11.3 12.9 14.5 16.1 17.7 19.3 20.9 22.5 24.1 25.7
kilometers/hour
h
ect
ar
es
/h
o
u
r
16 FT
13 FT