Great-plains TSF1290 Operator Manual User Manual download pdf (Page 36)

32 TSF1080, TSF1090, TSF1280 & TSF1290 Great Plains Manufacturing, Inc.

500-641M 05/10/2012

Manual Throttle Valve

When the manual throttle valve is full open (valve in

Figure 28 on page 40), the pressure adjustment can be

very sensitive. The butterﬂy valve has to move more

often causing additional wear.

To decrease the sensitivity, set the manual throttle

adjustment valve as follows:

1. Open the throttle valve so that it is wide open and

there is full ﬂow to the sprayer booms. Open the but-

terﬂy valve until it is full open.

2. Close the throttle valve down until the pressure is

about 20 psi greater than the pressure you intend to

spray at. Spraying pressure is determined when cali-

brating sprayer. Refer to the Application Guide.

With this valve set, it decreases the ﬂow through the

electric ball valve and reduces the sensitivity of the pres-

sure adjustment switch.

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Great-plains TSF1290 Operator Manual User Manual Page 36