Nozzle Flow Check Test

N102384
N102384-UN-12FEB13

Nozzle Flow Check

A - Diagnostics Softkey

B - Tests Tab

C - Enter Button

Nozzle Flow Check is a procedure to check your application rate at a desired speed while the machine is not moving. The following items can be determined:

  • If the actual application rate can meet the target application rate at a given speed
  • The actual flow rate in Lpm (gpm) out of the boom
  • Whether the nozzles are worn
  • The pressure at the spray control valves given a desired speed and application rate
  • If there is a pressure drop between the boom section shut-off valves and nozzles

  1. IMPORTANT: Always fill the solution tank with clean water to do a proper nozzle flow check.

    Select Diagnostics Softkey (A).

  2. Select the Tests tab (B).

  3. NOTE: Master Spray ON/OFF switch is disabled in transport range. Spraying is only allowed in low and field range.

    Select Enter button (C) next to Nozzle Flow Check. Nozzle Flow Test page will appear.

  4. N103040
    N103040-UN-10APR13

    A - Input Box

    B - Pre-programmed Target Rates Per Area

    Select input box (A) next to Test Speed. Enter a speed value, such as 16.1 km/h (10 mi/h), using pop-up keyboard. Select the enter button to accept new value.


  5. Turn rate select knob to target application rate (1, 2, or 3). Rate shown in this example is (B) 94 L/hec (10 gal/ac).

  6. Operate engine at maximum RPM.

  7. Turn the Master Spray Switch ON.

  8. Hold a known volume container (such as a calibration container) under a nozzle and measure output for one minute. Amount collected times the number of nozzles should equal the flow per minute displayed on screen.

    For example, using a size 3 nozzle and the pressure at 276 kPa (40 psi) with 72 nozzles, total volume should be 82 Lpm (21.6 gpm) (i.e. 1.14 Lpm (.3 gpm) per nozzle x 72 nozzles = 82 Lmp (21.6 gpm).

    If the volume is higher than expected and pressure is lower than expected, nozzle tips could be worn.

    If the pressure is higher than expected for the given output, nozzle tips could be partially plugged. Also a pressure drop could be occurring from boom section shut-off valves to nozzle tips (normally only associated with high flow rates.)

CS12167,0000353-19-20130613