**Piston Pump Setting Calculations**

**Use the following formulas to calculate the correct pump setting
for a pump and drive setup:**

**Note: **Pump RPM cannot exceed 350 RPM. Dial setting needs

to fall between 2 and 10, or drive sprockets need to be changed.

**G-1000 Series** 1 RPM = .076 Gal per minute (full stroke)

**G-2000 Series** 1 RPM = .152 Gal per minute (full stroke)

**Step 1. **

**Swath width in feet DIV 16.5 x 2 x mph x desired rate per acre DIV
60 minutes = Gallons per minute required.**

**Step 2. **

**MPH x (A) teeth on wheel sprocket x 336 x Drive (M) DIV (B) wheel
diameter x (C) teeth on pump x Driven (K) x output per RPM = Maximum Output
per Min**

**Step 3. **

**Gallons per minute required (Step 1) DIV Maximum Output per Minute
(Step 2) = Dial setting on pump**

**Example, Pump G-1000 Series **

For a 21 foot swath running at 5 mph, at 10 gallons per acre, and with your drive as follows: (in reference with the above illustration and a 28" Diameter wheel, A=15, K=20, M=40, and C=18 teeth).

**Step 1. **

**21 ft. DIV 16.5 x 2 x 5 mph ÷ 60 min x 10 GPA = 2.1 gal per
minute required.**

**Step 2. **

**5 x 15 (A) x 336 x 40(M) DIV 28 (B) x 18(C) x 20(K) =1008000 DIV
10080 = 100 x .076 = 7.6 gal per minute.**

**Step 3. **

**Needed: 2.1 GPM DIV Fullstroke: 7.6 GPM = .276 Dial Setting **

To get to Gallons per Acre, take the desired rate per acre divided by dial setting:

**10 (desired rate) DIV .2763 (dial setting) = 36.19 (max gallons per
acre or 10 on the pump). **

**Examples: **

**36.19 x .9 = (32.5 gallons per acre on dial setting 9). 36.19 x .8
= (28.9 gallons per acre on dial setting 8). 36.19 x .7 = (25.3 gallons
per acre on dial setting 7), etc.**