MacDon R80 Rotary Disc Pull-Type Windrower - Manual (Page 51)

OPERATION
Form # 169053
49
Model Year - 2009
6.13.7 Ground Speed
CAUTION
Reduce speed when turning, crossing
slopes, or when travelling over rough
ground.
a. Operate the PTO at rated speed.
b. Choose a ground speed that allows the cutterbar
and conditioner to cut the crop smoothly and
evenly. Try different combinations of PTO and
ground speed to suit your specific crop.
c. In tough cutting conditions, such as native
grasses, the PTO speed will need to be
maintained and ground speed decreased.
d. In light crops the PTO can be reduced (reduce
engine rpm) and shifting into a higher gear to
maintain ground speed.
NOTE
Operating the header at the minimum
PTO speed will extend the wear life of
components, and save fuel.
e. The chart below indicates the relationship
between ground speed and area cut for a 13 ft
header.
Example: At ground speed of 13 mph (21 km/h) with
a 16 ft. windrower, 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