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Setting Spinner Speed – Hydraulic Spinners Only
We recommend a spinner speed of 650–725 RPM as this unit is designed for a 50ft.
spread pattern for fertilizer and a 30ft. pattern for lime. This spreader is equipped with a
flow control valve to adjust spinner speed and to maintain a constant speed after your
tractor reaches proper PTO RPM's. Generally the flow control valve will need to set at
about 6, however due to machining tolerances, this setting will vary from one spreader
to the next.
Spinner speed should be set following these guidelines:
1) Rev engine speed to proper PTO RPM (540/1000).
a. Before starting engine be sure that there is no material or obstructions in
bed or on spinners.
2) Take a hand tach reading on spinner shaft.
a. Spinners shafts are center drilled underneath the spinners to accept a hand
tach.
b. If unit has a control system with spinner speed sensor and spinner speed
read out, this can be used in place of hand tach reading.
3) Adjust lever on flow control valve until desired speed is reached - the higher the
indicator number the faster the spinners should run.
4) After getting correct spinner speed, increase tractor engine RPMs to proper PTO
RPM (540/1000) - spinner speed should remain within reason of the desired
speed.
5) If spinner speed does not remain constant within reason, disassemble flow control
valve and clean parts as outlined under Troubleshooting Procedures, Problem I,
investigations B and C.
NOTE: In some instances, due to density of materials, a faster or slower spinner
speed may be desired. If so, follow above procedures and set speed accordingly.
CAUTION: Due to normal wear, the setting on the flow control valve may need
to be set higher as time goes by. Check spinner speed often.
CAUTION: Spinner speed is one of the most important factors in achieving a
proper spread pattern and must be set properly and checked regularly.
NOTE: If the spinners are running too fast you will tend to leave a thin streak
behind the center of the tractor, if they are too slow it will leave a heavy streak.
Record Valve Setting ____________
8 - 2
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