TM 5-4220-225-14
SECTION III. DIRECT SUPPORT MAINTENANCE INSTRUCTIONS
Paragraph
Page
5-6
General................................................................................................................ 5-5
5-7
Lower Breech Ring............................................................................................... 5-6
5-8
Viewport Assemblies............................................................................................ 5-12
5-9
Air Supply Adapter............................................................................................... 5-18
5-10
Air Supply Valve ..................................................................................................5-20
5-11
Diffuser Assembly................................................................................................ 5-24
5-12
Communications Whip ......................................................................................... 5-26
5-13
Helmet Shell ........................................................................................................ 5-28
5-14
Communications Box ........................................................................................... 5-30
5-6. General. This section contains MK12 Surface Supported Diving System (SSDS) maintenance procedures which
are the responsibility of the direct support maintenance as authorized by the MAC and Source, Maintenance, and
Recoverability (SMR) coded items. Maintenance procedures will be presented step-by-step in the order in which the
work is logically performed. Cleanliness is imperative in maintaining and handling diving system components. All tools
and parts must be kept free of oil, grease, rust or other contamination in accordance with Chapter 4, Section VII of this
manual.
5-5
