TM  5-4220-231-14&P CHAPTER 4 INTERMEDIATE DIRECT     SUPPORT MAINTENANCE Page Section I Introduction .................................................. 4-1 Section II Diver   Air  Control    Console (DACC)    Component Replacement Procedures ..... 4-1 Section III Volume    Tank    Assembly (VTA)  Component Replacement Procedures ....... 442 Section IV Diver   Air  Storage System (DASS)    Component Replacement Procedures ..... 44M Section     V Chamber Reducing Station    (CRS)    Component Replacement Procedures ..... 4-74 Section VI Hose    Assemblies Component Replacement Procedures ................. 4-116 Section I.  INTRODUCTION 4-1     General. This    section provides replacement procedures to   correct     component failures or  faults    which    can cause a   malfunction in  the    SDASS operation. These procedures are    designed for   Intermediate Direct   Support Maintenance. Section II.    DIVER    AIR   CONTROL CONSOLE (DACC) COMPONENT REPLACEMENT PROCEDURES Page 4-2 General ........................................................... 4-21 4-3 High   Pressure (HP)   Filter .............................................. 4-3 4-4 High   Pressure (HP)   Regulator .......................................... 4-6 4-5 Low   Pressure (LP)   Supply    or  Volume    Tank    Supply    Valve ...................... 4-11 4-6 High   Pressure (HP)   Supply    Valve ....................................... 4-15 4-7 High   Pressure (HP)   or   Low   Pressure (LP)   Gage     Isolation    Valve ................. 4-19 4-8 Bleed    Valve ....................................................... 4-23 4-9 Crossover Valve .................................................... 4-27 4-1