MacDon R85 Rotary Disc 16 Foot Self-Propelled Windrower Headers - Manual (Page 87)

OPERATING THE HEADER
6.7 Cutting Height
Cutting height is determined by a combination of the angle of the cutterbar/header and the roller gauge or skid
shoe settings.
Cutting height should be adjusted for optimum cutting performance without allowing excessive build-up of mud and
soil inside the header that can lead to poor crop flow and increased wear on cutting components.
Choose an angle that maximizes performance for your crop and field conditions. Refer to Section 6.6 Header Angle,
page 78 .
Optional adjustable gauge rollers or skid shoes are available to also provide different cutting heights. Refer to
Sections
6.7.1 Adjusting Gauge Roller Height , page 79 and 6.7.2 Adjusting the Skid Shoe Height, page 80 .
• Lowering the skid shoes/gauge rollers or decreasing header angle increases the cutting height. This may be
desirable in stony conditions to reduce damage to cutting components. Also, a longer stubble length helps material
dry faster.
• Raising the skid shoes/gauge rollers and increasing header angle allows the crop to be cut lower.
To minimize damage to cutterbar components, scooping soil, or soil build-up at the cutterbar in damp conditions,
header float should be set as light as possible without causing excessive bouncing.
When the float setting is light, it may be necessary to use a slower ground speed to avoid excessive bouncing and
leaving a ragged cut.
6.7.1 Adjusting Gauge Roller Height
DANGER
To avoid bodily injury or death from unexpected
start-up or fall of raised machine: stop engine,
remove key, and engage safety props before going
under machine for any reason.
1. Raise header fully, stop engine, and remove key.
Engage header safety props.
2. Remove lynch pin and remove adjuster pin (A) from
one side of the roller.
3. Hold roller and remove lynch pin and adjuster pin (A)
from other side. Position roller at desired position and
reinstall adjuster pins (A). Secure with lynch pins.
4. Repeat for roller at opposite end of header.
5. Adjust mud bar (B) by loosening nuts (C) and retighten
to maintain minimum clearance between mud bar
and roller.
Figure 6.18
169457
79
Rev. F