Walinga Grain-Vac 7614F Operator's Manual page 35

8. Maximum Capacity:
a. The nozzle should be placed into the
grain with the inlet below the surface of
the grain but not below the air-slide. It is
recommended that some air be allowed to
enter with the grain to obtain the best
capacity.
b. Open the air-slide about 3-4 inches to
start. Close the air-slide until the machine
starts to pulsate. Then open the air-slide
until the pulsing stops. This will give a
balanced grain and airflow condition.
7614F Grain-Vac Operator's Manual 34-100853-6
Fig. 4-17 Nozzle in Bin
32