MacDon R85 Rotary Disc 13 Foot Pull-Type - Manual (Page 43)

OPERATION
Form 169454
41
Revision A
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)
counter clockwise (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 re-adjust 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 lock-out valves before
going under machine.
A
B