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Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 8: To re-assemble, place the new check valve assembly
(Part #: PJDI140) into the top of the barb.
Step 7: Don’t try to remove the spring but if it is deformed or
stretched, the complete check valve assembly needs to be
replaced. If you don’t remember the last time you changed these
parts, just replace them now.
D14MZ3000 Troubleshooting - Part 2
Step 9: Then, press it into the stem as shown.