GREAT PLAINS YP4425A, Operating Manual, Page: 104 / 170

2018-07-30 Table of Contents Index 401-805M
YP4425A Table of Contents Index Maintenance and Lubrication 100
Seed Disc Maintenance
Refer to Figure 119
When removing seed discs, inspect them for wear and
damage. If there is any seed dust or treatment build-up in
the cell pockets
, or along the raised wiper ridges ,
clean the discs and re-inspect.
Replace discs for conditions including:
•
Chips at circumference . These will leak air.
•
Chips at edges or in sculpted surfaces of cell
pockets
. These can leak air and/or adversely
affect singulation.
•
Cracks over 2 inch (5 cm) long in the working face
of the disc, or any cracks in support webs or to an
edge.
•
Warping - if any part of the disc does not press firmly
on the seed drop brushes (page 78) in operation,
replace the disc.
•
Wear - if a wiper ridge is worn away, replace the disc.
If the seed pockets are worn through, or the air
ports
have enlarged, replace the disc.
Cleaning and Storing Seed Discs
Possible Chemical Hazard:
Wear gloves when washing discs. Avoid spray. Do not wash
discs where food is prepared, or where cookware or
dinnerware is washed. Seed discs will have talc and graphite
residue, and may have residues of hazardous seed treatments.
Although the discs are dishwasher-safe, do not wash them in
an appliance also used for food preparation or food serving
items.
Use warm or hot water, mild soap, and a sponge or soft
brush to remove build-up.
If discs are washed, allow them to dry completely prior to
storage.
Retain original shipping cartons for disc storage.
Otherwise, store them on edge (and not leaning), or
stacked horizontally on a spindle, to eliminate any risk of
warps. Any seed residue on discs may attract pests.
Fully enclose dry discs to prevent rodent damage.
Figure 119
Disc Seed Cells and Wiper
29613
1
2
1
4
5
3
1 2
3
1
4
5