Bourgault XR770 & XR750 Settings Guideline
When harrowing conditions are good, almost any setting will do a good job.  When they are not, it can be more challenging to find the combination of settings that will do the best job.  The beauty of the XR harrow series is that changes to one setting does not affect the others.  For example, once the optimal tine angle is found, adjustments to the ADF (down force) and boom angle (pitch) will have little impact on the tine angle, shortening the time and reducing the frustration to achieve desired field finish.
  • Set the tine angle based on the volume of straw that should be held in the harrow in the given conditions to achieve the desired results.  To increase the amount of straw being carried, move it to a higher number which will stand the tines up taller.  Decrease the tine angle to reduce the amount of straw being carried.
  • Set the pitch with the boom angle to change where the straw is being carried.  Roll it forward (set to a higher number) to carry the straw in the front of the section, useful for tougher field and straw conditions.  Roll the book back (set to a lower number) to carry the straw at the rear of the harrow frame, more useful for breaking up straw in dryer field and straw conditions.
  • ADF (down/up) pressure is adjusted with the ADF valve, either in the cab on the 415 box or on the hitch.  Increase the pressure to do more incorporation, soil scratching, and collecting of straw.  Decrease the pressure to do a lighter job of harrowing.  The ADF can be set to the point of adding “up” pressure and, when combined with forward pitch and rearward tine angle will do the least aggressive job of harrowing.
Download the Quick Reference Chart for more info on setting the XR Series Harrows.