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Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 13: To change the plunger assembly (Part #: PJDI138),
grasp the white plunger rod and pull it down as far as it will go.
D14MZ3000 Troubleshooting - Part 1
Step 14: Position the needle nose pliers near the
top of the plunger.
Step 15: Then, quickly and carefully twist the plunger counter
clockwise and remove.