MacDon R80 Rotary Disc Pull-Type Windrower - Manual (Page 45)

OPERATION
Form # 169053
43
Model Year - 2009
6.13.2.2 Hydraulic Adjustment (if equipped)
The header angle can be adjusted from the
tractor without shutting down the mower
conditioner.
a. To decrease (flatten) header angle, operate
tractor hydraulic control so that cylinder (C)
retracts, moving the gauge (D) toward the green
zone.
b. To increase (steepen) header angle, operate
tractor hydraulic control so that cylinder (C)
extends, moving the gauge (D) toward the red
zone.
6.13.3 Header Flotation
Header flotation springs are normally set so 95-
105 lbf (426-471 N) is required to lift either end
of the header just off the ground. In rough or
stony conditions, it may be desirable to maintain
a lower force to protect cutting components.
NOTE
When float setting is light, it may be
necessary to use a slower ground speed
to avoid excessive bouncing and leaving a
ragged cut.
6.13.3.1 Flotation Adjustment
IMPORTANT
Float setting (or lifting force) must be
equal on both ends of the header. Left
and right ends require different spring
lengths to achieve equal float at both
ends.
a. Center header directly behind the tractor.
b. Raise header fully, shut off engine and remove
key.
DANGER
Stop engine and remove key from ignition
before leaving operator's seat for any
reason. A child or even a pet could engage
an idling machine.
c. Engage lift cylinder lock-out valves.
d. Back jam nut (A) away from spring.
e. To increase flotation, turn adjuster bolt (B)
clockwise (further into spring).
f. To decrease flotation, turn adjuster bolt (B)
counterclockwise (out of spring).
g. Tighten jam nut (A) against spring insert to
secure the setting.
h. Lower header and check header flotation at
each end.
NOTE
Other operating variable adjustments may
affect float setting. Check the float and
readjust if necessary after adjusting
cutting height or header angle. Also, if
using a tractor with drawbar height
different than 16 inches (406 mm) flotation
will be affected. Adjust as required.
WARNING
To avoid bodily injury or death from
unexpected start-up or fall of raised
machine; stop engine, remove key and
engage lift cylinder lockout valves before
going under machine.
A
B
D
RED ZONE GREEN ZONE
C