Proper filtering of liquid fertilizer is important to prevent obstruction of the orifices and damage to the piston pump. An 80 mesh (AA40216) main strainer (A) is provided as standard equipment and is located in the line to the bottom of pump. It should be checked and cleaned after the intial start up and daily or as required thereafter. Located at each row in the special orifice fittings are 50 mesh strainers. These strainers are needed initially only to trap assembly-related particles and they can be removed after the system has been operating several hours (but only if a #43 or larger orifice is being used). If not removed, these strainers should be checked and cleaned after startup and daily, or as required if obstruction of fertilizer flow is observed at the row. Obstructions will result in increased manifold pressure reading on gauge installed at the manifold.

Fertilizer with excessive contamination can cause increased frequency of main strainer clean out requirements. Should this become unacceptable and the orifice number used is 43 or greater, a coarser 50 mesh screen strainer (AA40215) is available through service parts. Using this coarser main strainer requires that the individual row 50 mesh strainers be replaced with a coarser 24 mesh screen. These strainers are also available through service parts. See your John Deere dealer.

IMPORTANT: To prevent damage to the piston pump see "Storage" Section for recommendations on storage procedures.

A54946,AQ -19-25APR97-1/1