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Figure 1-1. MK12 Surface Supported Diving System (SSDS)
CHAPTER 1 INTRODUCTION - TM-5-4220-225-14_10
List of Abbreviations
SECTION II. EQUIPMENT DESCRIPTION AND DATA
Figure 1-2. Location and Description of Major Components (Sheet 1 of 3)
Figure 1-2. Location and Description of Major Components (Sheet 2 of 3)
Figure 1-2. Location and Description of Major Components (Sheet 3 of 3)
Equipment Data.
System Flow. Open Circuit
Figure 1-3. MK12 SSDS Open Circuit Flow Pattern
Figure 1-4. MK12 Helmet Assembly.
TECHNICAL PRINCIPLES OF OPERATION -cont
Figure 1-5. Exhaust Valves
CHAPTER 2 OPERATING INSTRUCTIONS - TM-5-4220-225-14_22
Figure 2-1. MK12 SSDS Helmet Assembly Controls and Indicators.
SECTION II. OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
Purpose of PMCS Table
Table 2-1. Operator Preventive Maintenance Checks and Services
Operator Preventive Maintenance Checks and Services (Cont) - TM-5-4220-225-14_27
Operator Preventive Maintenance Checks and Services (Cont) - TM-5-4220-225-14_28
Operator Preventive Maintenance Checks and Services (Cont) - TM-5-4220-225-14_29
Operator Preventive Maintenance Checks and Services (Cont) - TM-5-4220-225-14_30
Operator Preventive Maintenance Checks and Services (Cont) - TM-5-4220-225-14_31
Operator Preventive Maintenance Checks and Services (Cont) - TM-5-4220-225-14_32
Operator Preventive Maintenance Checks and Services (Cont) - TM-5-4220-225-14_33
Operator Preventive Maintenance Checks and Services (Cont) - TM-5-4220-225-14_34
Operator Preventive Maintenance Checks and Services (Cont) - TM-5-4220-225-14_35
Operator Preventive Maintenance Checks and Services (Cont) - TM-5-4220-225-14_36
Figure 2-2. Vacuum Test, One Way Valve
Test Procedures -cont
Figure 2-3. Helmet P/Flow and Leak Test
Helmet P/Flow and Leak Test -cont
Relief Valve Test
Figure 2-4. Relief Valve Test
Drysuit Leak Test
Figure 2-5. Drysuit Leak Test
Communications Check
Figure 2-6. Communications Check
SECTION III. OPERATION UNDER USUAL CONDITIONS - TM-5-4220-225-14_47
Table 2-2. Mission Predive Setup Procedure.
Mission Predive Setup Procedure (Cont) - TM-5-4220-225-14_49
Mission Predive Setup Procedure (Cont) - TM-5-4220-225-14_50
Mission Predive Setup Procedure (Cont) - TM-5-4220-225-14_51
Table 2-3. Daily Predive Procedures
Daily Predive Procedures (Cont) - TM-5-4220-225-14_53
Daily Predive Procedures (Cont) - TM-5-4220-225-14_54
Daily Predive Procedures (Cont) - TM-5-4220-225-14_55
Daily Predive Procedures (Cont) - TM-5-4220-225-14_56
Daily Predive Procedures (Cont) - TM-5-4220-225-14_57
Table 2-4. Donning Procedures
Donning Procedures (Cont) - TM-5-4220-225-14_59
Donning Procedures (Cont) - TM-5-4220-225-14_60
Figure 2-7. Helmet Placement
Figure 2-8. Helmet Locking Pin
Figure 2-9. Flowmeter Readings for Controlled Overbottom Pressure.
Overbottom Pressure Requirements.
Figure 2-10. Manifold Pressure Requirements
Figure 2-11. Flowmeter Readings for 6 ACFM with Constant Manifold Pressure.
Figure 2-12. Flowmeter Readings for 4 ACFM with Constant Manifold Pressure.
Figure 2-13. Flowmeter Readings for2 ACFM with Constant Manifold Pressure
Table 2-5. Doffing Procedures
Table 2-6. Doffing Procedures
Postdrive Procedures
Table 2-7. Postdive Procedures (Cont)
Postdive Procedures (Cont) - TM-5-4220-225-14_73
Postdive Procedures (Cont) - TM-5-4220-225-14_74
Figure 2-14. Divers Intercommunication Set.
SECTION IV. OPERATION UNDER UNUSUAL CONDITIONS
Helmet Locking Device Failure
CHAPTER 3 OPERATOR MAINTENANCE
Table 3-1. Operator Troubleshooting Procedures.
CHAPTER 4 UNIT MAINTENANCE
Initial Inspection
SECTION IV. UNIT TROUBLESHOOTING
Table 4-1. Unit Troubleshooting Procedures
Unit Troubleshooting Procedures (Cont)
Unit Troubleshooting Procedures (Cont). - TM-5-4220-225-14_85
Unit Troubleshooting Procedures (Cont). - TM-5-4220-225-14_86
Unit Troubleshooting Procedures (Cont). - TM-5-4220-225-14_87
Unit Troubleshooting Procedures (Cont). - TM-5-4220-225-14_88
Unit Troubleshooting Procedures (Cont). - TM-5-4220-225-14_89
Unit Troubleshooting Procedures (Cont). - TM-5-4220-225-14_90
Unit Troubleshooting Procedures (Cont). - TM-5-4220-225-14_91
General. - TM-5-4220-225-14_92
Diver's Coveralls
Figure 4-1. Outer Garment, Repair
Diver's Drysuit.
Figure 4-2. Seam, Repair
Neckpiece.
Figure 4-3. Abrasion, Repair
Boots
Figure 4-4. Straps, Repair
Figure 4-5. Loop, Repair
Figure 4-6. Buckle, Repair.
Diver's Mittens.
Figure 4-7. Diver's Mitten, Repair.
Diver's Harness.
Figure 4-9. Hardware, Replace
Helmet Base Breech Ring
Figure 4-10. Helmet Base Breech Ring, Replace
Lower Breech Ring Assembly.
Figure 4-11. Lower Breech Ring Assembly, Replace
Air Supply Adapter
Figure 4-12. Air Supply Adapter Assembly, Replace
Air Supply Adapter -cont
Air Supply Tube
Figure 4-13. Air Supply Tube, Replace
Air Supply Tube -cont
Air Supply Valve - TM-5-4220-225-14_117
Figure 4-14. Air Supply Valve, Replace.
Air Supply Valve -cont - TM-5-4220-225-14_119
Diffuser Assembly - TM-5-4220-225-14_120
Figure 4-15. Diffuser Assembly, Replace
Adjustable Exhaust Valve
Figure 4-16. Adjustable Exhaust Valve, Replace
Adjustable Exhaust Valve (Cont)
Figure 4-17. Adjustable Exhaust Valve, Repair
Adjustable Exhaust Valve -cont
Ambient Exhaust Valve
Figure 4-18. Ambient Exhaust Valve, Replace
Ambient Exhaust Valve (Cont)
Figure 4-19. Ambient Exhaust Valve, Repair
Helmet Lug
Figure 4-20. Helmet Lug, Replace
Helmet Lug (Cont) - TM-5-4220-225-14_133
Figure 4-21. Quick Release Pin, Replace
Helmet Lug (Cont) - TM-5-4220-225-14_135
Figure 4-23. Safety Pin, Replace
Helmet Communications
Figure 4-24. Helmet Assembly Schematic
Helmet Communications (Cont) - TM-5-4220-225-14_139
Figure 4-25. Helmet Communications Assembly, Disassemble
Helmet Communications (Cont) - TM-5-4220-225-14_141
Figure 4-26. Helmet Communications Assembly, Assemble.
Helmet Communications (Cont) - TM-5-4220-225-14_143
Figure 4-27. Microphone, Replace
Helmet Communications (Cont) - TM-5-4220-225-14_145
Figure 4-28. Speaker, Replace
Communications Whip - TM-5-4220-225-14_147
Figure 4-29. Communications Whip, Test
Helmet Liner
Figure 4-30. Helmet Liner, Replace
Helmet Ducts
Figure 4-31. Supply Duct, Replace
Helmet Ducts (Cont)
Figure 4-32. Return Duct, Replace
Air Supply Whip.
Figure 4-33. Air Supply Whip, Service
Air Supply Whip (Cont)
Figure 4-34. Air Supply Whip, Replace
Umbilical.
Figure 4-35. Diver End Umbilical, Replace
Umbilical (Cont) - TM-5-4220-225-14_161
Figure 4-36. Surface End Umbilical, Replace
Communications Box
Figure 4-37. Communications Station, Replace
SECTION VI. PREPARATION FOR STORAGE OR SHIPMENT - TM-5-4220-225-14_165
SECTION VII. UNIT LEVEL CLEANING PROCEDURE FOR DIVING LIFE SUPPORT AIR SYSTEMS
Pre-Cleaning of Components or Piping - TM-5-4220-225-14_167
Cleaning Method - Non-Ionic Detergent
Cleaning Method
Table 4-3. TSP Cleaning Solution Volume.
Table 4-4. Cleaning Solution Flow Rate.
Table 4-5. Cleaning Agents Comparable with Soft Goods.
Table 4-5. Cleaning Agents Comparable with Soft Goods (Cont)
Documentation and Record Keeping - TM-5-4220-225-14_174
CHAPTER 5 DIRECT SUPPORT MAINTENANCE
Direct Support Troubleshooting Procedures
Table 5-1. Direct Support Troubleshooting Procedures (Cont) - TM-5-4220-225-14_177
Table 5-1. Direct Support Troubleshooting Procedures (Cont) - TM-5-4220-225-14_178
SECTION III. DIRECT SUPPORT MAINTENANCE INSTRUCTIONS
Lower Breech Ring
Figure 5-1. Lower Lug, Replace
Lower Breech Ring (Cont) - TM-5-4220-225-14_182
Figure 5-3. Lower Breech Ring Retainer, Replace
Lower Breech Ring (Cont) - TM-5-4220-225-14_184
Figure 5-4. Neck Dam, Replace
Viewport Assemblies
Figure 5-5. Front Viewport, Replace
Viewport Assemblies (Cont) - TM-5-4220-225-14_188
Figure 5-6. Side Viewport, Replace
Viewport Assemblies (Cont) - TM-5-4220-225-14_190
Figure 5-7. Top Viewport, Replace
Air Supply Adapter.
Figure 5-8. Air Supply Adapter, Repair
Air Supply Valve - TM-5-4220-225-14_194
Figure 5-9. Air Supply Valve, Repair
Air Supply Valve -cont - TM-5-4220-225-14_196
Diffuser Assembly - TM-5-4220-225-14_197
Figure 5-10. Air Diffuser Assembly, Repair
Communications Whip - TM-5-4220-225-14_199
Figure 5-11. Communications Whip, Replace
Helmet Shell.
Figure 5-12. Helmet Shell, Replace
Communications Box.
Figure 5-13. Transformer/Heat Sink Assembly, Replace
Communications Box (Cont) - TM-5-4220-225-14_205
Figure 5-15. Control Knob, Replace
Communications Box (Cont) - TM-5-4220-225-14_207
Figure 5-16. Printed Circuit Assembly Layout.
Figure 5-17. Interior Front Panel View.
Figure 5-18. System Electrical Schematic
Communications Box (Cont) - TM-5-4220-225-14_211
Replace audio amplifier assembly
CHAPTER 6 GENERAL SUPPORT MAINTENANCE
Umbilical
Air hose burst test.
Air hose coupling pull test.
Pneumofathometer hose pressure and leak test.
Umbilical (Cont). - TM-5-4220-225-14_218
Figure 6-1. Air Supply Hose, Fabrication
Pneumofathometer hose.
Figure 6-2. Pneumofathometer Hose, Fabrication
Communications/strength cable.
Figure 6-3. Communications Cable, Fabrication (Sheet 1 of 6)
Umbilical (Cont) - TM-5-4220-225-14_224
Figure 6-3. Communications Cable, Fabrication (Sheet 2 of 6)
Umbilical (Cont). - TM-5-4220-225-14_226
Figure 6-3. Communications Cable, Fabrication (Sheet 3 of 6)
Umbilical (Cont) - TM-5-4220-225-14_228
Figure 6-3. Communications Cable, Fabrication (Sheet 4 of 6)
Umbilical (Cont) - TM-5-4220-225-14_230
Figure 6-3. Communications Cable, Fabrication (Sheet 5 of 6)
Umbilical (Cont) - TM-5-4220-225-14_232
Figure 6-3. Communications Cable, Fabrication (Sheet 6 of 6)
Communications/strength cable splice.
Figure 6-4. Communications/Strength Cable, Splice.
Umbilical (Cont). - TM-5-4220-225-14_236
Figure 6-5. Marline Wrap of Umbilical
Assemble marline wrap. -cont
Umbilical (Cont) - TM-5-4220-225-14_239
Figure 6-6. Tape Wrap of Umbilical.
APPENDIX A REFERENCES - TM-5-4220-225-14_241
APPENDIX B MAINTENANCE ALLOCATION
Column Entries
Tool and Test Equipment Requirements (Sect. III and IV)
SECTION II. MAINTENANCE ALLOCATION CHART FOR MK12 SURFACE SUPPORTED DIVING SYSTEM
MAINTENANCE ALLOCATION CHART FOR MK12 SURFACE SUPPORTED DIVING SYSTEM -cont - TM-5-4220-225-14_246
MAINTENANCE ALLOCATION CHART FOR MK12 SURFACE SUPPORTED DIVING SYSTEM -cont - TM-5-4220-225-14_247
MAINTENANCE ALLOCATION CHART FOR MK12 SURFACE SUPPORTED DIVING SYSTEM -cont - TM-5-4220-225-14_248
SECTION III. TOOL AND TEST EQUIPMENT REQUIREMENTS FOR MK12 SURFACE SUPPORTED DIVING SYSTEM
TOOL AND TEST EQUIPMENT REQUIREMENTS FOR MK12 SURFACE SUPPORTED DIVING SYSTEM -cont - TM-5-4220-225-14_250
TOOL AND TEST EQUIPMENT REQUIREMENTS FOR MK12 SURFACE SUPPORTED DIVING SYSTEM -cont - TM-5-4220-225-14_251
TOOL AND TEST EQUIPMENT REQUIREMENTS FOR MK12 SURFACE SUPPORTED DIVING SYSTEM -cont - TM-5-4220-225-14_252
APPENDIX C COMPONENTS OF END ITEM AND BASIC ISSUE ITEMS LISTS
SECTION II. COMPONENTS OF END ITEMS
COMPONENTS OF END ITEMS -cont - TM-5-4220-225-14_255
COMPONENTS OF END ITEMS -cont - TM-5-4220-225-14_256
Description Usable FSCM and Part Number
Description Usable FSCM and Part Number - TM-5-4220-225-14_258
SECTION III. BASIC ISSUE ITEMS
Description Usable FSCM and Part Number - TM-5-4220-225-14_260
APPENDIX D ADDITIONAL AUTHORIZATION LIST
ADDITIONAL AUTHORIZATION LIST (Cont) - TM-5-4220-225-14_262
ADDITIONAL AUTHORIZATION LIST (Cont) - TM-5-4220-225-14_263
APPENDIX E EXPENDABLE SUPPLIES AND MATERIALS LIST
SECTION II. EXPENDABLE SUPPLIES AND MATERIALS LIST
EXPENDABLE SUPPLIES AND MATERIALS LIST -cont
INDEX - TM-5-4220-225-14_267
INDEX (Cont) - TM-5-4220-225-14_268
INDEX (Cont) - TM-5-4220-225-14_269
INDEX (Cont) - TM-5-4220-225-14_270
The Metric System and Equivalents - TM-5-4220-225-14_273
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