MacDon R85 Rotary Disc 16 Foot Self-Propelled Windrower Headers - Manual (Page 73)

6 Operating the Header
Satisfactory operation of the header in all situations requires making proper adjustments to suit various crops
and conditions.
Correct operation reduces crop loss and increases productivity. As well, proper adjustments and timely maintenance
will increase the length of service you receive from the machine.
The variables listed below and detailed on the following pages will affect the performance of the header. You will
quickly become familiar with adjusting the machine to give you the desired results. Most of the adjustments have
been set at the factory, but if desired, the settings can be changed to suit crop conditions.
Variable See Section
Header float 6.1 Header Float, page 65
Roll gap 6.2 Roll Gap, page 67
Roll tension 6.3 Roll Tension, page 70
Roll timing 6.4 Roll Timing, page 71
Forming shields 6.5 Forming Shields, page 74
Header angle 6.6 Header Angle, page 78
Cutting height 6.7 Cutting Height, page 79
Disc speed 6.7.3 Disc Speed, page 80
Ground speed 6.8 Ground Speed, page 81
6.1 Header Float
Header float 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 lighter setting to protect cutting components.
When float setting is light, it may be necessary to use a slower ground speed to avoid excessive bouncing resulting
in a ragged cut. Faster ground speeds may require additional ground pressure.
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