Great Plains PH-20 Operator Manual - Manual (Page 34)

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Section 5 Maintenance and Lubrication
PH-15, PH-20, PFH-15 and PFH-20 Precision Fertilizer Hitch 148-365M 12/29/2011
Great Plains Mfg., Inc.
Storage
This hitch could have negative tongue weight when hitched to a
three-point drill in the raised position. Negative tongue weight
will cause the unsecured hitch tongue to raise suddenly and
could cause injury or death. Always lower drill before unhook-
ing hitch from tractor.
Store the hitch where children do not play. If possible,
store the hitch inside for longer life.
1. Clean hitch as necessary.
2. Lubricate all fittings and chains as indicated under Lu-
brication, page 33.
3. Lower coulters onto a hard surface or board. Apply a
light coat of oil to exposed cylinder rods.
Pump and Fertilizer Tank
To prepare for long-term storage:
1. Flush tanks, nozzles, hoses and pump thoroughly with
fresh, warm water. Circulate water until all corrosive
salts in pump are dissolved.
2. Set pump dial to 10. Draw a mixture of half diesel fuel
and half #10 oil into pump. Continue drawing fuel and
oil mixture into pump until discharge is clean.
3. Plug pump inlet and outlet.
4. Wash any components that may have been exposed
to fertilizer.
5. Drain filter, fittings and ball valves. Any water left in the
system may freeze and damage these parts.