Equipment Damage/Material Loss Risks:
If planting without fertilizing, the pump must not be allowed to
run dry. Disconnect the chain or remove a sprocket. The
ground drive contact wheel and chain system operates
whenever the planter is lowered and in motion.

Note: When a Type 3 fertilizer system is installed, the

pump is mounted at the source (not on the planter),
usually on a tank cart.

For sprocket and dial settings, refer to the Seed Rate
manual.

Liquid Fertilizer Strainer(s)

The optional ground drive fertilizer pump systems
include a strainer at the pump. The Type 3 system relies
on strainers at the source, usually on a tank cart.

The strainer(s) are delivered with a mesh screen. You
need to check that each screen is an appropriate size for
the orifice plates you plan to use.

If changing screen sizes, keep in mind the following:

• Generally, select a mesh screen the same or slightly

smaller than the orifice size.

• A substantially smaller mesh (e.g. 100) will reduce

manifold orifice plates plugging so often, but the
strainer screen will have to be cleaned more often.

• A much larger mesh (e.g. 50 or 30) will pass more

material but should only be considered when using
large manifold orifice plates.

• A plugged or partially plugged screen starves the

pump and results in a reduced application rate.
Monitor the pressure gauge for a reduction in pressure
that indicates a plugged strainer screen.

Figure 67

John Blue Pump

Sprocket and Dial

28416

Figure 68

Strainer

21965