20.Assemble the flow control gauge onto the flow control mounting bracket as shown in figure 14. Secure with nylon washer and hand knob.
OFF
PLASTIC KNOB 
NYLON
WASHER
FLOW
CONTROL
GAUGE
FLOW
CONTROL
ARM
FLOW CONTROL
MOUNTING BRACKET
FIGURE 14
21.Move flow control arm to off position and slide flow control mounting bracket toward hopper until clo- sure plate (located in bottom of hopper) is com- pletely closed. Tighten 1/4" hex lock nuts as- sembled in step 19. See figure 14.
22.