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Proper protection, such as gloves, eye wear, and aprons, are recommended when disassembling a Dosatron.
Step 12:
Install the new seal (Part #: J009) into the groove.
Step 11:
To replace the seal, pinch and roll it off of the plunger.
Step 10:
Take a close look at the plunger seal for nicks, scratches,
or wear. If you see damage or don’t remember the last time you
changed the seal, just replace it now.
D25RE2 Troubleshooting - Part 1