D420 Service Manual
Use this manual at your own risk. It is not approved by Scubapro.
DIY service of scuba life support equipment may kill you.
This manual has been adapted from a copy of Version 1.0, March 2020
D420 SERVICE PROCEDURE, D420 SECOND STAGE GUIDELINES,
DISASSEMBLY, ASSEMBLY, ADJUSTING AND FINAL TEST,
published by Johnson Outdoors. As no copyright notice was observed on the
document, any use of copyrighted material is unintended and inadvertent.
The document had apparently been translated from the Italian, and text has
been modified for clarity where translated phrases were unclear.
The author has made additions and modifications based upon his experience,
which have not been approved by Scubapro.
Use this document at your own risk.
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