Distributor Blade Tuning - Dalton Mobility 100 Operating And Parts Manual

FINE TUNING OF DISTRIBUTOR AND BLADE SETTINGS
All Mobility Spreaders are given an average standard factory setting of distributor blades. Such a setting, of
course, cannot be perfect for all field conditions and materials. The following information will be helpful in
adjusting the distributor blades on your machine to give optimum performance for your specific conditions.
Your spread pattern will be affected by 1) the material used, 2) the distributor blade setting, and 3) the rotation
speed of the distributors. The distributors are designed to be operated at 750 RPM (540 tractor P.T.O. RPM).
A plus or minus 10% change in distributor RPM will increase or decrease spread pattern width accordingly.
An increase in PTO RPM will tend to deposit less material at the center of the spread pattern, while a decrease
will deposit more material at the center. The physical characteristics of the materials being spread, which are
important to the spread pattern, include bulk density, particle size, particle shape, physical strength and rugosity
or surface roughness. For best performance it is recommended that you fine tune your machine to the material
being used. The spreading profile and spread swath width can be changed drastically by alteration of the setting
of the distributor blades. The drawing on the next page shows had blades may be extended from or retracted
toward the center of the disc. Also, the angle of blade intersection with a radius of the disc may be altered. They
may be advanced toward coincidence with the disc radius or retarded away from it. Further, blade lengths are
not all equal. These adjustments affect the spread pattern in the following ways:
1. Advance long blades--more material to the outside of spread pattern; also will increase spread pat-
tern width.
2. Retard long blades--opposite effect of above.
3. Advance short blades—helps eliminate problem of streaking in the middle of spread pattern.
4. Retard short blades—puts more material in the center of spread pattern.
5. Extend blades away from center of spinner—increases spread width somewhat.
6. Retract blades (more towards center of spinner)—opposite effect of above.
7. Moving flow divider (or chute) toward the front of spreader will tend to put more material in center
of spread pattern. This is because material is deposited on outer edge of spinner causing it to leave
earlier.
8. Moving divider toward the rear of the spreader has the opposite effect.

DISTRIBUTOR BLADE TUNING

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