Great Plains 3P300 Operator Manual - Manual (Page 19)

17
Section 3 Adjustments
3P200 and 3P300 Three-Point Sprayer 500-103M 3/6/06
Great Plains Mfg., Inc.
ed. Refer to Calibration Procedures in the Application
Guide.
The electric ball valve is used to adjust the pressure to the
booms. It is controlled with the pressure adjust switch on
the control box. The boom pressure is displayed by the
boom pressure gauge.
To adjust the pressure, hold the pressure adjust toggle
switch up for more pressure, down for less pressure.
As the tank level decreases, the boom pressure may
change. Check boom pressure gauge frequently and
make sure that the pressure doesn’t change. Generally,
the boom pressure will need to be adjusted up slightly
when the tank level decreases.
When the manual pressure adjustment valve, Figure 3-2,
is wide open, the pressure adjust switch is very sensitive.
To decrease the sensitivity of the pressure adjust, set the
manual pressure adjustment valve. Refer to Manual Pres-
sure Valve in the “Operating Instructions” section on
page
12.
Agitation Valve/Manual Pressure Valve
Figure 3-2
15783
Elevator Slide Adjustment
Refer to Figure 3-3:
The elevator slide is initially adjusted at the factory so that
the slide blocks have the correct tolerances between the
blocks and the vertical elevator tuber. Over time the
blocks will wear and may need to be adjusted. To adjust
the slide blocks, adjust the slide block clearance bolts (#1)
so that the slide frame is centered and parallel with the el-
evator frame. Make sure all blocks have 1/32 of an inch
clearance between the block and the vertical tube when
finished.
Elevator Slide Adjustment
Figure 3-3
15803
IMPORTANT: With the boom mounted, there will be
1/16 of an inch clearance on the top rear and lower
front blocks. The other blocks will be touching the
tube due to the weight of the boom.