Distribution

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The John Deere™ Liquid Fertilizer system uses manifold(s) and in-line orifices of varying sizes to evenly distribute product at various application rates. Machines have manifold(s) mounted on the frame. The system is used with all John Deere™ fertilizer openers.

The fertilizer system uses in-line orifices at each row to maintain system pressure. The lower end of pressure range, 103 kPa (1.0 bar) (15 psi), must be maintained to ensure even fertilizer distribution. Do not exceed the upper end of the range, 689 kPa (6.9 bar) (100 psi). The pump setting and orifices are adjusted when changing rates. To set application rate, refer to the rate chart, then adjust pump to desired setting and install recommended orifices. Next verify that system pressure is within 103—621 kPa (1.0—6.2 bar) (15—90 psi) when traveling at desired planting speed.

NOTE: As planter travel speed is increased, the fertilizer system pressure will also increase.

The delivery hose is equipped with a check valve near each opener. A pressure of 14 kPa (0.1 bar) (2 psi) minimum must be present before fertilizer is delivered to the opener.

Priming the fertilizer system is critical to obtain best performance, especially at low flow rates. (See PRIMING AND INITIAL STARTUP OF PUMP in this section.) Eliminate kinks, pinches, or sharp bends in the fertilizer hoses. Any restriction reduces fertilizer flow to that opener.

IMPORTANT: All liquid fertilizer systems should be equipped with a gauge or sensor to monitor system pressure. SeedStar™ equipped planters display fertilizer pressure on the monitor.

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Liquid Fertilizer Pressure Gauge

A - Valve

The liquid fertilizer pressure gauge has a small valve (A) on the top that is used as a vent. Flip the valve open if the gauge is mounted vertically. Flip the valve closed if the gauge is mounted horizontally. This prevents the glycerine from leaking out of the gauge when mounted horizontally.

A pressure gauge kit is available for the piston pump fertilizer systems. (See your John Deere™ dealer for more information.)

IMPORTANT: Avoid pump damage. Remove drive chain from piston pump when fertilizer system is not in use.

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