Great Plains NP4000B Operator Manual - Manual (Page 129)

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 125
2014-05-14 Table of Contents Index 417-199M
Cooler Hydrostatic Relief Valve
Refrigerant Line
This is the same tubing used for row delivery .
Part ID Service Life Date Life Started Replace Before Date
Raven or Great Plains
334-0002-005 5 years: the replace-by date
is stamped on the valve.
Part ID Service Life Date Placed in Service Replace Before Date
Great Plains
990-259R
10 Year rated life
A23
A3
A45