Aqua_Lung_MODE_Maintenance_Manual_MODE_LW-LD.pdf

M.O.D.E. Manual 488021 - Ed. 04/03/2021

Maintenance Manual

M.O.D.E.

LW – LD

MODULAR OXYGEN DIVING EQUIPMENT

LIGHT WEIGHT – LONG DURATION

M.O.D.E. Maintenance Manual 488021 - Ed. 04/03/2021 CH1–2/104

488021 - Ed. 04/03/2021 CH1–3/104

RECORD OF CHANGES

CHANGE NO.* DATE TITLE OR BRIEF DESCRIPTION ENTERED BY

*List advanced change notices (ACN) and formal notices as received. If an ACN is superseded by a formal change, cross out the ACN.

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488021 - Ed. 04/03/2021 CH1–5/104

CONTENTS

RECORD OF CHANGES ................................................................................................................................. 1–3

FORWARD ....................................................................................................................................................... 1–7

COPYWRIGHT NOTICE .............................................................................................................................. 1–7

WARNINGS, CAUTIONS OR NOTES .......................................................................................................... 1–7

ABBREVIATIONS AND ACRONYMS .......................................................................................................... 1–7

CHAPTER 1 : MAINTENANCE ............................................................................................................... 1–8

1.1 INTRODUCTION ................................................................................................................................ 1–8

1.2 GENERAL SAFETY AND ENVIRONMENTAL PRECAUTIONS ........................................................ 1–8

Maintenance Safety .................................................................................................................. 1–8

Oxygen Safe Area .................................................................................................................... 1–8

Hazardous Material Disposal Instructions ................................................................................ 1–8

1.3 MAINTENANCE REQUIREMENTS ................................................................................................... 1–9

Tools and Test Equipment ........................................................................................................ 1–9

Service Kits and Repair Parts ................................................................................................... 1–9

Oxygen cleaning procedure (ref. 00036) .................................................................................. 1–9

1.3.3.1 Introduction ........................................................................................................................... 1–9

1.3.3.2 Generalities ........................................................................................................................... 1–9

1.3.3.3 Procedure ............................................................................................................................. 1–9

1.3.3.4 Recommended cleaners ..................................................................................................... 1–10

Sanitizing ................................................................................................................................ 1–10

Lubrication .............................................................................................................................. 1–10

Torque Specifications ............................................................................................................. 1–10

1.4 MAINTENANCE POLICY ................................................................................................................. 1–11

AFTER DIVE CARE ................................................................................................................ 1–11

MONTHLY MAINTENANCE ................................................................................................... 1–11

ANNUAL PREVENTATIVE MAINTENANCE ......................................................................... 1–11

Life time components .............................................................................................................. 1–12

1.5 MAINTENANCE DOCUMENTATION .............................................................................................. 1–12

Maintenance History Form (MHF) .......................................................................................... 1–12

1.6 FIRST NEEDS KIT P/N 488340 ........................................................................................................ 1–14

1.7 SERVICE KIT P/N 488350 ............................................................................................................... 1–16

1.8 STANDARD TOOLS P/N 488310 ..................................................................................................... 1–21

1.9 SPECIFIC TOOLS P/N 488320 ........................................................................................................ 1–21

CHAPTER 2 : TROUBLESHOOTING ................................................................................................... 2–22

2.1 INTRODUCTION .............................................................................................................................. 2–22

2.2 TROUBLESHOOTING PROCEDURES ........................................................................................... 2–22

2.3 CORRECTIVE MAINTENANCE ....................................................................................................... 2–22

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CHAPTER 3 : CORRECTIVE MAINTENANCE AND OVERHAUL PROCEDURES ........................... 3–26

3.1 INTRODUCTION .............................................................................................................................. 3–26

3.2 CORRECTIVE MAINTENANCE AND OVERHAUL PROCEDURES ............................................... 3–26

Table 6-1 List of sub assemblies for corrective Maintenance and Overhaul Procedures ................ 3–27 Table 6-2 Preliminary Disassembly.................................................................................................. 3–28 Table 6-3 VRGA Disassembly/Reassembly .................................................................................... 3–30 Table 6-4 O2 Cylinder Visual Inspection and Hydrostatic Testing ................................................... 3–40 Table 6-5 O2 Gauge Overhaul ......................................................................................................... 3–41 Table 6-6 Fill Port Disassembly/Reassembly .................................................................................. 3–44 Table 6-7 Bypass Disassembly/Reassembly ................................................................................... 3–47 Table 6-8 IP hose Disassembly/Reassembly .................................................................................. 3–48 Table 6-9 Demand Valve Disassembly/Reassembly ....................................................................... 3–49 Table 6-10 ExtendAir Canister Disassembly/Reassembly............................................................... 3–54 Table 6-11 Cover Disassembly/Reassembly ................................................................................... 3–56 Table 6-12 OPV Disassembly/Reassembly ..................................................................................... 3–57 Table 6-13 Exhale Hose Disassembly/Reassembly ........................................................................ 3–60 Table 6-14 Inhale Hose Disassembly/Reassembly ......................................................................... 3–62 Table 6-15 Mouthpiece Disassembly/Reassembly .......................................................................... 3–65 Table 6-16 Breathing Bag Inspection ............................................................................................... 3–67 Table 6-17 FME Plug Disassembly/Reassembly ............................................................................. 3–68 Table 6-18 FME Cap maintenance .................................................................................................. 3–70 Table 6-19 Final Assembly and Testing ........................................................................................... 3–71

3.3 PART LISTS ..................................................................................................................................... 3–73

3.4 MANUFACTURER SUPPORT ......................................................................................................... 3–73

3.5 LIST OF EXPLODED VIEW DRAWINGS ......................................................................................... 3–73

APPENDICES ...................................................................................................................................... 4–102

APPENDIX A: VRGA OXYGEN CHARGING PROCEDURES ...................................................... 4–102

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FORWARD

COPYWRIGHT NOTICE

This manual is the property of Aqua Lung France. Any copying, photocopying, reproduction, translation, electronic distribution (e-mail, Internet...), even partial, and in any form, is strictly forbidden without the written agreement of this manual is copyrighted, all rights reserved. It may not, in whole or in part be copied, photocopied, reproduced, translated, reduced to any electronic medium, made into a machine-readable form or distributed through the internet without prior consent in writing from Aqua Lung France.

WARNINGS, CAUTIONS OR NOTES

WARNING! Highlights an essential operating or maintenance procedure, practice, condition or statement which if not strictly observed could result in diver injury or death.

CAUTION: Highlights an essential operating or maintenance procedure, practice, condition or statement which if not strictly observed could result in equipment damage or loss of mission effectiveness.

NOTE: Highlights an essential operating or maintenance procedure, practice, condition or statement which adds, emphasizes or clarifies essential information of special importance or interest.

ABBREVIATIONS AND ACRONYMS

Term Definition Term Definition bar Metric unit of pressure (1bar = 14.5psi) Kg Kilogram cf Cubic feet Lb Pound

CNS Central Nervous System L/min Liters per Minute

CO2 Carbon Dioxide LP Low Pressure

CW Clockwise MHF Maintenance History Form

CCW Counterclockwise min. Minute

DOT Department of Transportation mm Millimeters

DV Demand Valve MODE Modular Oxygen Diving Equipment

EAC ExtendAir Cartridge msw Meters of Seawater

EX Exhale connection/port N/A Not Applicable

F Fahrenheit NOC Navy Oxygen Cleaner

FME Foreign Material Exclusion O2 Oxygen ft-lb Foot-pound OPV Overpressure Valve fsw Feet of seawater PN Part Number

HP High Pressure psi Pounds per square inch (14.5 psi = 1 bar)

IAW In Accordance With RFI Ready for Issue

in. Inch UBA Underwater Breathing Apparatus in-lb Inch-pound VENTID+C CNS O2 Toxicity Acronym

IP Intermediate Pressure VRGA Valve/Reducer/Gauge Assembly

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CHAPTER 1 : MAINTENANCE

INTRODUCTION

WARNING! Properly performed maintenance is an essential prerequisite to safe and dependable diving operations with the MODE UBA. Omission or negligent performance of prescribed maintenance procedures for this equipment may result in equipment failure and possible diver injury or death.

CAUTION: Only qualified MODE Technicians shall perform maintenance on the MODE however, qualified MODE divers may perform pre-dive and post-dive procedures.

This chapter outlines the necessary general information required to perform scheduled maintenance on the MODE UBA. Scheduled maintenance is the most import method to ensure the ready and safe state of any UBA.

A systematic scheduled maintenance plan that is supervised and performed by qualified and attentive personnel is the first line of defense to prevent system or material failures by detecting and correcting problems before they occur. This chapter further outlines general safety considerations, tools, test equipment, service kits, replacement parts, cleaners, lubricants, procedures, personal qualifications and maintenance records that are required to perform proper UBA maintenance.

NOTE: Chapter 3 provides the detailed step-by-step procedure required to perform scheduled maintenance called out in this chapter.

GENERAL SAFETY AND ENVIRONMENTAL PRECAUTIONS

Maintenance Safety In addition to the safety precautions prescribed throughout this manual, maintenance shall be carried in accordance with the following instructions and general guidelines:

a. Ensure pneumatic systems are depressurized before performing maintenance

b. Exercise extreme care when charging, handling or storing HP oxygen cylinders

c. Maintenance involving entry into pressure boundaries of the UBA is done in an O2 safe area

d. Entry into pressurized O2 boundaries (threaded fittings, joint connections, etc..) for maintenance or repair of the MODE require specific qualifications, found in paragraph 4-4.

Oxygen Safe Area

Components requiring O2 related maintenance, repair or cleaning shall be disassembled, cleaned, inspected and reassembled in a designated O2 safe area with the following minimum requirements:

a. Work area shall be enclosed, well lighted, climate controlled and restricted to essential traffic only

b. Work area shall be clean and free of oil, grease, dust, dirt and other foreign matter

c. Work surfaces shall be clean and non porous

d. Tools shall be clean and designated “FOR O2 USE ONLY”

e. Personnel shall have clean hands, face and clothing

f. Area shall be clearly marked; “RESTRICTED – O2 SAFE AREA” and “NO SMOKING, EATING OR

DRINKING”

Hazardous Material Disposal Instructions Each unit shall comply with its own ship/station procedures for handling hazardous material and hazardous waste.

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MAINTENANCE REQUIREMENTS

Tools and Test Equipment Tools used to service, troubleshoot, repair and test the MODE should be high quality tools that do not corrode, chip, scratch or damage easily. Tools must be kept clean and free from oil, grease, dust, dirt and other foreign matter. Keep all MODE tools and test equipment segregated from other general purpose shop tools. Ensure that these tools are designated for O2 use only to make others aware of their unique purpose. The necessary tools are listed in §2.8 and 2.9.

Service Kits and Repair Parts

Specific service kits have been developed that contain the necessary replacement parts and soft goods used during scheduled or unscheduled maintenance of the MODE’s main assemblies and components. Other repair parts used in non-routine service and repair are available as well. See §2.7 for a listing of the service kit.

Oxygen cleaning procedure (ref. 00036)

1.3.3.1 Introduction

This procedure refers to the STANAG 1449: Diving system – Oxygen Cleaning Procedures and Standards. This procedure provides instructions for Aqua Lung rebreather components using Enriched Air Nitrox or Oxygen. This procedure must be used in addendum to the service and repair manual for each individual product.

1.3.3.2 Generalities

They are several methods used for cleaning oxygen equipment described in STANAG 1449. Criteria for choosing the best one includes the followings: size and geometry of component, material compatibility.

As well, the cleaning agent must be compatible with material and source of contamination to be removed.

Technician protection, methods, equipments, cleaning agents must be in accordance with STANG 1449.

AQUA LUNG recommends a method for each of the steps noted below.

WARNING! HP hoses and HP gauges must not be cleaned during servicing. Indeed, the design of an HP hose (flow restrictor) and HP gauge (bourdon pipe) are not compatible with rinsing of the cleaning agent.

No products may enter inside the channel of gaseous. Servicing of those components is limited to replacement of O-rings.

CAUTION: Don’t use acid solution with rubber and plastic components.

1.3.3.3 Procedure

5 steps are required to guarantee a component ready for use with oxygen.

Aqua Lung recommends the methods described below from those available in STANAG 1449.

a. Pre cleaning

Pre cleaning with a small nylon brush and/or ultrasonic cleaner inside:

A phosphoric acid bath or aqueous cleaning solution for metallic parts.

An aqueous cleaning solution for rubber, plastic or bi-material metallic/plastic parts.

b. Cleaning Use an ultrasonic cleaner with a warm aqueous cleaning solution.

c. Rinsing Rinse with fresh water or demineralized water to remove cleaning solution.

d. Drying Let dry alone inside a controlled area or using a low pressure hydrocarbon-free gas (N2 or hydrocarbon-free air for oxygen compatibility)

e. Visual inspection Inspect under a strong light to check any signs of organic material, cleaning solution, dust, scale, humidity, chrome loss, or other contamination.

An ultraviolet light can also be used.

Unpowdered gloves must be worn during manipulation.

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1.3.3.4 Recommended cleaners

CLEANER

APPLICATION

SOURCE

NETALU

Phosphoric acid bath for metallic parts.

Pre-cleaning and cleaning.

AQUALUNG PN# 455001 (1 liter)

OCTAGON OCC

(Navy Oxygen Cleaner ; NOC)

Aqueous pre-cleaning and cleaning solution.

Octagon Process

PROMOCLEAN TP1113

Aqueous pre-cleaning and cleaning solution.

Promoclean TM

Liquid dishwashing detergent (diluted with warm water)

Pre-cleaning degreaser for metallic parts. General cleaning for solution for plastic, rubber.

Household grade

Sanitizing It is recommended that the equipment is disinfected after each dive, or at least with each change of user, in order to avoid the proliferation or transmission of viral or bacterial illness.

Sub-assemblies to be disinfected:

• Mouthpiece

• Corrugated hoses

• Basket of absorbent cartridge

• Bag and water trap

Disinfection procedure:

• Soak the parts for 20 mins in the disinfectant solution

• Rince the parts with clear water

• Dry the parts before reassembly

Lubrication Lightly lubricate all O-rings prior to installation using Christo-Lube MCG 111. Apply lubricant sparingly as excessive amounts can foul certain components.

Torque Specifications Specific components of the MODE require the use of a calibrated torque device and prescribed torque settings during reassembly. Proper torque specifications must be observed to ensure proper assembly and to prevent equipment damage. Torque specifications for MODE components are located in chapter 3.

NOTE: Calibrated torque device is not provided.

WARNING: DO NOT use muriatic acid for the cleaning of any parts. Muriatic acid, even when strongly diluted, can harm chrome plating, and may leave a residue that is harmful to O-ring seals and other parts.

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MAINTENANCE POLICY

Scheduled maintenance for the MODE is based on the manufacturer’s recommendations and will ensure reliable and safe operation of the UBA. Scheduled maintenance requirements are integrated into operational procedures that are performed during pre-mission, pre-dive and post-dive checks (Chapter 3 of Operation manual).

3 levels of preventative maintenances will guarantee the safe operation of the apparatus throughout its operational life.

• After dive care

• Monthly preventative maintenance

• Annual preventative maintenance

Qualifications required to perform maintenance, other than pre-dive and post-dive procedures, are obtained after successful completion of the manufacturers MODE Technician Training course.

AFTER DIVE CARE

After dive care is the first level of maintenance.

It consists of the “Post Dive checklist”, Figure 3.4 and “Post Dive Procedure”, Table 3.4, located in Chapter 3 of Operation manual.

MONTHLY MAINTENANCE

Monthly preventative maintenance should be carried out regardless of the number of dives made with the apparatus.

This maintenance consists of:

• Complete visual examination of the apparatus o Remove the corrugated hoses and the mouthpiece o Remove the VRGA o Remove the absorbent cartridge

• Check the IP of the VRGA

ANNUAL PREVENTATIVE MAINTENANCE

The MODE breathing apparatus has been designed to allow intensive use during a whole year without any maintenance other than the regular post-dive care and the monthly IP.

An annual preventative maintenance is required to guarantee the optimum operation of the apparatus throughout its life.

WARNING! Annual preventative maintenance should be carried out regardless of the number of dives made with the apparatus

The annual preventative maintenance is intended to check the entire apparatus and all its components and replace all worn parts.

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It consists by proceeding sub-assembly by sub-assembly, following the instructions given in Chapter 3:

o Disassemble the sub-assembly o Destroy all components which will be replaced o Clean all components which will be re-used o Visual check of all components to be re-used. If certain components show faults, replace them with new components.

o Re-assemble the sub-assembly

CAUTION: During re-assembly, refer to the apparatus maintenance kit. That lists all parts to be replaced. These parts must be replaced with new parts contained in the kit, and must in no case be re-used even if the apparatus has been little used since its last maintenance.

o Adjusting the sub-assembly o Testing the sub-assembly.

o Final re-assembly of the apparatus o Final adjustment and check o Storing of the apparatus

Life time components

Some parts have a limited life time due to the material they are made of.

The life time starts when the apparatus is put into service.

Here is a list of Aqua Lung’s recommendations concerning these parts.

COMPONENTS LIFE TIME

CORRUGATED HOSES 5 years

MP HOSES 5 years

HP HOSES 5 years

MAINTENANCE DOCUMENTATION

This section addresses the document that is established upon receipt of the MODE by the end user command.

This document shall remain with the UBA throughout its life and kept up to date by the custodian of the rigs.

Proper documentation and record keeping will ensure continued integrity of the MODE through its lifespan.

In a folder or binder the document is referred to as the rig jacket.

Maintenance History Form (MHF)

The MHF is kept in the rig jacket and provides a chronological history of all maintenance that has been done on an individual rig. Pertinent information may include but is not limited to:

a. Scheduled maintenance

b. Troubleshooting

c. Test results

d. Corrective maintenance

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SERIAL NUMBER: ________________

COMMISSIONING DATE: _______________

MAINTENANCE HISTORY FORM (MHF)

MODE UBA

FIRST YEAR OF MAINTENANCE

Full annual maintenance

Comments : ……………………………………………………………………………………..

Date :…………………. VISA

SECOND YEAR OF MAINTENANCE

THIRD YEAR OF MAINTENANCE

FOURTH YEAR OF MAINTENANCE

FIFTH YEAR OF MAINTENANCE

Parts replaced: CORRUGATED HOSES

MP HOSES

HP HOSES

Comments :………………………………………………………………………………………

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FIRST NEEDS KITS P/N

Components included in the first needs kit, allow to the user to replace main o-rings of the UBA, in case of any leak which would happen before the scheduled maintenance.

MODE FIRST NEED KIT 488335

P/N DESCRIPTION Qty Used in

488187 OR 164.7 x 3.53 NITRILE 70shA 1 488000 Apparatus - Cover

113679 OR 2 x 34 NITRILE 80 ShA 2

488060 - 488070

Inhale - Exhale hoses

467509 OR 1,78 x 36,3 NITRILE 70ShA 2

487019 KAPSTO Plug 2

487020 Inhal-Exhal valve 2

496218 O-RING, 2.62 x 32.99, EPDM 80ShA 2

116631 OR 1.78x6.07 NITRILE 70ShA 1 488100 VRGA

AP1445 OR 1,78x9,25 EPDM 80ShA 1 488110 Filling plug

488095-85 Complete HP O2 gauge 116174 OR1,78 x 8,74 NITRILE 85ShA 3

116881 OR 1.78x7,65 NITRILE 70ShA 1 488145 or 488147 - MP hose

488205 OR 2.62 x 42.52 EPDM 70ShA 2 488220 MODE LW Canister

Or

488260 MODE LD Canister

488224 OR 112 x 3 NITRILE 50ShA 1

488226 OR 3,53 x 15,47 NITRILE 70ShA 1

MODE EXTENDAIR LD FIRST NEED KIT 488339

488187 OR 164.7 x 3.53 NITRILE 70shA 1 488000 Apparatus - Cover

113679 OR 2 x 34 NITRILE 80 ShA 2

488060 - 488070

Inhale - Exhale hoses

467509 OR 1,78 x 36,3 NITRILE 70ShA 2

487019 KAPSTO Plug 2

487020 Inhal-Exhal valve 2

496218 O-RING, 2.62 x 32.99, EPDM 80ShA 2

116631 OR 1.78x6.07 NITRILE 70ShA 1 488100 VRGA

AP1445 OR 1,78x9,25 EPDM 80ShA 1 488110 Filling plug

488095-85 Complete HP O2 gauge 116174 OR1,78 x 8,74 NITRILE 85ShA 3

116881 OR 1.78x7,65 NITRILE 70ShA 1 488145 or 488147 - MP hose

488205 OR 2.62 x 42.52 EPDM 70ShA 2

488250 MODE LD ExtendAir Canister 488257 Lip seal 1

488259 OR 129,77 x 3,53 NITRILE 50ShA 1

495015 OR 3,53 x 15,47 NITRILE 70ShA 1

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MODE EXTENDAIR LW FIRST NEED KIT 488340

488187 OR 164.7 x 3.53 NITRILE 70shA 1 488000 Apparatus - Cover

113679 OR 2 x 34 NITRILE 80 ShA 2

488060 - 488070

Inhale - Exhale hoses

467509 OR 1,78 x 36,3 NITRILE 70ShA 2

487019 KAPSTO Plug 2

487020 Inhal-Exhal valve 2

496218 O-RING, 2.62 x 32.99, EPDM 80ShA 2

116631 OR 1.78x6.07 NITRILE 70ShA 1 488100 VRGA

AP1445 OR 1,78x9,25 EPDM 80ShA 1 488110 Filling plug

488095-85 Complete HP O2 gauge 116174 OR1,78 x 8,74 NITRILE 85ShA 3

116881 OR 1.78x7,65 NITRILE 70ShA 1 488145 or 488147 - MP hose

488205 OR 2.62 x 42.52 EPDM 70ShA 2

488200 MODE LW ExtendAir Canister 488207 Lip seal 1

488209 OR 112 x 3 NITRILE 50ShA 1

495015 OR 3,53 x 15,47 NITRILE 70ShA 1

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SERVICE KITS

MODE SERVICE KIT P/N 488330

P/N Description of sub-kits Quantity

488000 Cover, Breathing Loop

488187 O-Ring, 164.7 x 3.53 NITRILE 1

480072 O-Ring, 2.9 x 1.78, EPDM 1

488060 Inhale Hose, Chest Mount

113679 O-Ring, 2 x 34, NITRILE 1

467509 O-Ring, 1.78 x 36.3, NITRILE 1

487020 One-way Valve, 1.38in 1

496218 O-Ring, 2.62 x 32.99, EPDM 1

487019 KAPSTO Plug 1

488070 Exhale Hose, Chest Mount

113679 O-Ring, 2 x 34, NITRILE 1

467509 O-Ring, 1.78 x 36.3, NITRILE 1

487020 One-way Valve, 1.38in 1

496218 O-Ring, 2.62 x 32.99, EPDM 1

487019 KAPSTO Plug 1

488140 Bypass Valve

486012 Washer 1

840163 O-Ring, 1.9 x 7.2, NITRILE 3

488145 / 488147 MP Hose

116631 O-Ring, 1.78 x 6.07, NITRILE 1

116881 O-Ring, 1.78 x 7.65, NITRILE 1

488150 Demand Valve

A02510 Lock-Nut, #5-40 1

116611 LP Seat 1

124706 O-Ring, 1.78 x 14, EPDM 1

444243 O-Ring, 1.78 x 6.07, EPDM 1

487165 Second Stage Diaphram 1

488151 Square Poppet Bearing 1

488190 Over Pressure Valve (OPV)

488195 Adjusting nut 1

488199 O-Ring, 1.78 x 10.82, NITRILE 1

488196 Rubber Washer 1

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488220 / 488260 Canister

488205 O-Ring, 2.62 x 42.52, NITRILE 2

488224 O-Ring 1.78 x 88.62 NITRILE 1

488226 O-Ring 2.62 x 101.27 NITRILE 1

490130 Mouthpiece Assembly

113648 Clamp, Tie Wrap 1

116121 O-Ring, 1.78 x 3.68, NITRILE 1

467509 O-Ring, 1.78 x 36.3, NITRILE 1

474071 O-Ring, 28 x 2.5, NITRILE 1

490135 O-Ring, 41 x 1.78, NITRILE 1

MODE EXTENDAIR LW SERVICE KIT P/N 488350

488187 O-Ring, 164.7 x 3.53 NITRILE 1

480072 O-Ring, 2.9 x 1.78, EPDM 1

488060 Inhale Hose, Chest Mount

113679 O-Ring, 2 x 34, NITRILE 1

467509 O-Ring, 1.78 x 36.3, NITRILE 1

487020 One-way Valve, 1.38in 1

496218 O-Ring, 2.62 x 32.99, EPDM 1

487019 KAPSTO Plug 1

488070 Exhale Hose, Chest Mount

113679 O-Ring, 2 x 34, NITRILE 1

467509 O-Ring, 1.78 x 36.3, NITRILE 1

487020 One-way Valve, 1.38in 1

496218 O-Ring, 2.62 x 32.99, EPDM 1

487019 KAPSTO Plug 1

488140 Bypass Valve

486012 Washer 1

840163 O-Ring, 1.9 x 7.2, NITRILE 3

488145 / 488147 MP Hose

116631 O-Ring, 1.78 x 6.07, NITRILE 1

116881 O-Ring, 1.78 x 7.65, NITRILE 1

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488150 Demand Valve

A02510 Lock-Nut, #5-40 1

116611 LP Seat 1

124706 O-Ring, 1.78 x 14, EPDM 1

444243 O-Ring, 1.78 x 6.07, EPDM 1

487165 Second Stage Diaphram 1

488151 Square Poppet Bearing 1

488190 Over Pressure Valve (OPV)

488195 Adjusting nut 1

488199 O-Ring, 1.78 x 10.82, NITRILE 1

488196 Rubber Washer 1

488200 Extendair Canister LW

488205 O-Ring, 2.62 x 42.52, NITRILE 2

488207 Lip Seal, MODE LW 1

488209 O-Ring, 3 x 112, NITRILE 1

495015 O-Ring, 3.53 x 15.47, NITRILE 1

490130 Mouthpiece Assembly

113648 Clamp, Tie Wrap 1

116121 O-Ring, 1.78 x 3.68, NITRILE 1

467509 O-Ring, 1.78 x 36.3, NITRILE 1

MODE EXTENDAIR LD SERVICE KIT P/N 488354

488187 O-Ring, 164.7 x 3.53 NITRILE 1

480072 O-Ring, 2.9 x 1.78, EPDM 1

488060 Inhale Hose, Chest Mount

113679 O-Ring, 2 x 34, NITRILE 1

467509 O-Ring, 1.78 x 36.3, NITRILE 1

487020 One-way Valve, 1.38in 1

496218 O-Ring, 2.62 x 32.99, EPDM 1

487019 KAPSTO Plug 1

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488070 Exhale Hose, Chest Mount

113679 O-Ring, 2 x 34, NITRILE 1

467509 O-Ring, 1.78 x 36.3, NITRILE 1

487020 One-way Valve, 1.38in 1

496218 O-Ring, 2.62 x 32.99, EPDM 1

487019 KAPSTO Plug 1

488140 Bypass Valve

486012 Washer 1

840163 O-Ring, 1.9 x 7.2, NITRILE 3

488145 / 488147 MP Hose

116631 O-Ring, 1.78 x 6.07, NITRILE 1

116881 O-Ring, 1.78 x 7.65, NITRILE 1

488150 Demand Valve

A02510 Lock-Nut, #5-40 1

116611 LP Seat 1

124706 O-Ring, 1.78 x 14, EPDM 1

444243 O-Ring, 1.78 x 6.07, EPDM 1

487165 Second Stage Diaphram 1

488151 Square Poppet Bearing 1

488190 Over Pressure Valve (OPV)

488195 Adjusting nut 1

488199 O-Ring, 1.78 x 10.82, NITRILE 1

488196 Rubber Washer 1

488250 Extendair Canister LD

488205 O-Ring, 2.62 x 42.52, NITRILE 2

488257 Lip Seal, MODE LD 1

488259 O-Ring, 3,53 x 129,77, NITRILE 1

495015 O-Ring, 3.53 x 15.47, NITRILE 1

490130 Mouthpiece Assembly

113648 Clamp, Tie Wrap 1

116121 O-Ring, 1.78 x 3.68, NITRILE 1

467509 O-Ring, 1.78 x 36.3, NITRILE 1

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VALVE REDUCER GAUGE ASSEMBLY (VRGA) SERVICE KIT P/N 488351

488095 Oxygen Pressure Gauge

116174 O-Ring, 1.78 x 8.74, NITRILE 2

213714 O-Ring, 2 x 11, EPDM 2

480906 Back-up Washer 2

522003 HP Spool w/ O-ring 1

488100 / 488105 Valve Reducer Gauge Assembly (VRGA)

054201 Safety Plug, 3000 psi 1

108322 Valve Seat 1

108327 Washer, White Teflon 1

116126 HP seat 1

116631 O-Ring, 1.78 x 6.07, NITRILE 1

124707 O-Ring, 1.78 x 3.68, EPDM 1

124708 O-Ring, 2.4 x 25, EPDM 1

214218 O-Ring, 1.78 x 14, NITRILE 1

444243 O-Ring, 1.78 x 6.07, EPDM 1

444244 Back-up Ring, 1.35 x 5.94 1

850228 O-Ring, 2.5 x 18, NITRILE 1

861362 O-Ring, 1.63 x 7.65, NITRILE 1

488110 Fill Port

116174 O-Ring, 1.78 x 8.74, NITRILE 1

480927 Circlip 1

495127 Filter, Bronze 1

522004 O-Ring, 1.52 x 1.42, EPDM 1

AP1445 O-Ring, 1.78 x 9.25, EPDM 1

OXYGEN PRESSURE GAUGE SERVICE KIT P/N 488352

488095 / 488085 Oxygen Pressure Gauge

116174 O-Ring, 1.78 x 8.74, NITRILE 2

213714 O-Ring, 2 x 11, EPDM 2

480906 Back-up Washer 2

522003 HP Spool w/ O-ring 1

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STANDARD TOOLS P/N 488310

P/N Description Used in

116239 1/4" Pipe Wrench 488150

445713 Spanner 44. 26x28 488100

467352 Cutting pliers 490130

467355 Screwdriver ACZ 4x100 488140 - 488190

467369 Circlip Pliers 488110

480764 Spanner 44. 14x15 488145

480766 Pipe wrench 8mm 488140

480769 Allen Key 82H. 4 488100

488375 Combination wrench 39, 3/8 488100

488376 Spanner 44. 27x29 488190

490930 Spanner 44. 18x19 488100

495371 Spanner 44. 16x17 488145 - 488100 - 488095

496511 Spanner 44. 12x13 488095

SPECIFIC TOOLS P/N 488320

P/N Description Used in

A00188 Micra retaining ring tool 488150

111399 Modified scewdriver 488100

116236 Seat Extraction Tool 488100

485208 Seat installation tool 488150

488323 O-ring Cone 488110

490935 Lug Spanner 488000 - 488100 - 488150 - 488140

490936 Hose Clamp Pincher 488060 - 488070

506001 O-ring Extraction Tool

Not included (option)

488371 Cylinder clamp 488100 - 488120

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CHAPTER 2 : TROUBLESHOOTING

This chapter contains information to assist MODE Technicians in locating the cause of system malfunction or performance degradation in the MODE UBA. The corrective maintenance actions presented in this section will restore the equipment to immediate operational readiness in most cases.

TROUBLESHOOTING PROCEDURES

The tables that follow separate symptoms, probable causes and maintenance actions into the two major MODE subsystems. Table 5-1 is the troubleshooting guide for the pneumatic subsystem and Table 5-2 is the troubleshooting guide for the recirculation subsystem. Personnel performing troubleshooting and corrective maintenance actions shall be qualified (paragraph 4-4.1).

CORRECTIVE MAINTENANCE

Corrective maintenance procedures are actions required to correct equipment failures and performance degradations. These procedures are to be used to correct faults identified in the troubleshooting procedures.

Corrective maintenance procedures are located in chapter 3.

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Table 5-1 Troubleshooting Guide Pneumatic Subsystem

Symptom Probable Cause Maintenance Action

VRGA will not depressurize with valve closed and system purged

1. Valve seat 108322 is worn or damaged

Replace valve seat

2. Machined seating surface within the VRGA body is damaged

Replace VRGA body

Low or no read out on O2 gauge

1. O2 cylinder is not sufficiently charged

Refill the O2 cylinder

2. Gauge hose is obstructed Replace the gauge hose

3. Gauge mechanism is obstructed Replace the gauge

4. VRGA flow is obstructed Overhaul VRGA

High or unstable IP creep

1. Valve seat 108322 is worn Replace valve seat

2. Valve seating surface is damaged (machined seat inside of the VRGA)

Replace VRGA body

3. Main spring 116171 is worn/defective

Replace main spring

4. HP seat 116126 is worn or damaged

Replace HP seat

5. HP seat crown sealing surface is damaged (machined inside of the

VRGA)

Replace VRGA body

Low IP

1. Main spring 116171 is worn/defective

Replace main spring

VRGA leak at fill port

1. Fill port check valve o-ring 522004 worn/damaged

Replace o-ring

External leak around piston

1.Piston head o-ring 124708 or shaft o-ring 124707 is worn or damaged

Replace o-ring(s)

2.O-ring grooves on piston 125717 are damaged

Replace piston and o-rings

3. Piston cap 108303 o-ring sealing surface is damaged

Replace piston cap

4. Piston o-ring sealing surface in the VRGA body 488102 is damaged

Replace VRGA body

O2 leak or free flow into breathing bag

1. IP too high Refer to “High or unstable IP creep”

2. DV opening effort misadjusted Adjust DV opening effort

3. IP hose 488145 or o-rings 116631 or 116881 are worn or damaged

Replace IP hose or replace IP hose o-rings

4. Bypass valve leak Overhaul bypass valve

5. DV adjustable seat 124259 is worn or damaged

Replace seat

6. LP seat 116611 is worn or damaged

Replace seat

7. Poppet 124510 is worn or damaged

Replace poppet

8. Poppet spring 124511 is worn or damaged

Replace poppet spring

9. Lever 485262 is bent or damaged Replace lever

DV delivers insufficient O2 (full cylinder)

1. IP is too low Refer to “Low IP” above

2. DV opening effort misadjusted (6- 8 inches of water)

Adjust DV opening effort

3. Bypass valve obstructed Overhaul bypass valve

4. IP hose obstructed Clean or replace IP hose

5. Lever 485262 is bent or damaged Replace lever

DV delivers excessive O2

1. IP is too high Refer to “High or unstable IP creep”

2. DV opening effort is misadjusted (6-8 inches of water)

Adjust DV opening effort

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Table 5-2 Troubleshooting Guide Recirculation Subsystem

Symptom Possible Cause Maintenance Action

High exhalation resistance

1. One way valve stuck to seat or damaged

Disconnect hose and inspect one-way valve. Perform suck and blow test.

2. Breathing hose kinked, twisted or constricted by other diver worn gear

Reroute hose and reconfigure other diver worn gear as needed

3. EAC channels obstructed or damaged

Install new EAC

4. Breathing bag overinflated or constricted by other diver worn gear

Deplete bag level and reconfigure other diver worn gear

High inhalation resistance

1. One way valve stuck to seat or damaged

Disconnect hose and inspect one-way valve. Perform suck and blow test.

2. Breathing hose kinked, twisted or constricted by other diver worn gear

Reroute hose and reconfigure other diver worn gear as needed

3. Failure within pneumatic subsystem

Refer to Table 5-1 (DV delivers insufficient O2)

4. Breathing bag underinflated or constricted by other diver worn gear

Increase bag level and reconfigure other diver worn gear

Breathing bag leak around collar

1. Cover o-ring 487028 is worn or damaged

Replace o-ring

2. Breathing bag collar (RF welded plastic) is damaged

Replace breathing bag

3. Quick lock collar 488040 fits too loose

Readjust tension by adjusting (unscrew) quick lock lever

Breathing bag leak around DV

1. Seal spanner nut 485258 loose Tighten seal spanner nut

2. Breathing bag gasket material is worn or damaged

Replace breathing bag

Breathing bag leak around bypass

1. Bypass spanner nut 487073 is loose

Tighten spanner nut

2. Breathing bag gasket material is worn or damaged

Replace breathing bag

Cover leaks around OPV 1. OPV nut 488193 is loose Tighten OPV nut

OPV doesn’t reseat after function test

1. Seat obstructed with foreign matter Flush OPV with fresh water and retest or replace OPV if flush fails to work

2. Spring is worn or damaged Replace OPV

OPV stuck closed 1. Stuck seat Replace OPV

Breathing hose leaks

1. Hole in corrugated hose Replace corrugated Hose

2. Hose clamp 480075 or 480091 loose

Tighten hose clamp

3. Hose clamp 480075 or 480091 damaged

Replace hose clamp

4. Hose end connector o-ring 113679, 496218 or 497509 worn or damaged

Replace end connector o-ring(s)

Mouthpiece leaks

1. Holes in rubber mouthpiece 480078

Replace rubber mouthpiece

2, Loose mouthpiece clamp 113648 Tighten or replace mouthpiece clamp

3. Loose lever Tighten lever screw

4. Worn or damaged o-rings 490135, 467509 and 474071 inside mouthpiece body

Overhaul mouthpiece

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CHAPTER 3 : CORRECTIVE MAINTENANCE AND

OVERHAUL PROCEDURES

WARNING! Properly performed maintenance by qualified MODE Technicians is an essential prerequisite to safe and dependable diving operations with the MODE UBA. Omission or negligent performance of prescribed maintenance procedures for this equipment may result in equipment failure, personal injury or death.

CAUTION: Only qualified MODE Technicians shall perform corrective maintenance on the MODE UBA.

NOTE: Prior to performing corrective maintenance actions, review general safety and environmental precautions located in chapter 1.

This chapter provides the detailed procedures that will be followed during corrective maintenance. Corrective maintenance restores a damaged or failed MODE to a serviceable, operational ready condition. Corrective maintenance is performed for repairable damage or when referenced by troubleshooting procedures located in chapter 3 of Operation manual.

Additionally, the following step-by-step procedures provide a means to accomplish MODE overhaul procedures that will be followed for scheduled maintenance as outlined in Chapter 1.

CORRECTIVE MAINTENANCE AND OVERHAUL PROCEDURES

Table 6-1 lists the sub assemblies for the maintenance for all of the MODE UBA components. Each maintenance action consists of a step-by-step “overhaul” procedure that covers applicable information such as; disassembly, cleaning, inspecting, lubricating, reassembly and testing.

Table 6-1 is also a companion to the scheduled maintenance listed in §4-4. The drawings found in chapter 3 that are associated with the various MODE components are listed in Table 6-1 as well and shall be used along with the overhaul procedures in this chapter.

If corrective or scheduled maintenance is required on MODE components, follow the preliminary disassembly procedures (Table 6-2) up to the point that you have isolated and removed the component that requires corrective maintenance. Once that component is repaired, follow the final assembly and testing procedures (Table 6-19) to reassemble and test the rig prior to restoring it to full service.

In the following procedures important torque specifications or other information that requires emphasis will be highlighted in bold red font. Examples: Do not lubricate HP seat or Torque burst plug to 1.2 m.kg.

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Table 6-1 List of sub assemblies for corrective Maintenance and Overhaul Procedures

Table No.

Exploded view Component

6-2 VE CR488000 Preliminary disassembly

6-3 VE CR488100 VRGA

6-4 VE CR488120 O2 cylinder

6-5 VE CR488095 O2 gauge

6-6 VE CR488110 Fill Port

6-7 VE CR488140 Bypass

6-8 VE CR488000 IP hose

6-9 VE CR488150 DV

6-10 VE CR488200 ExtendAir canister

6-11 VE CR488000 Cover, (quick lock collar)

6-12 VE CR488190 OPV

6-13 VE CR488060 Exhale hose, chest mount

6-14 VE CR488070 Inhale hose, chest mount

6-15 VE CR490130 Mouthpiece

6-16 VE CR488000 Breathing bag

6-17 VE CR488125 FME plug

6-18 - FME cap

6-19 VE CR488000 Final assembly and testing

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Table 6-2 Preliminary Disassembly

Check Procedure - Preliminary disassembly Supplemental info

1. Remove VRGA (2) from the breathing bag (1).

Hold for later overhaul IAW Table 6-3 (if applicable).

2. Install FME plug (488125) into VRGA outlet and FME cap (490395) onto bypass inlet.

3. Remove breathing hoses (12 & 14) from the cover (10).

Hold for later overhaul IAW Table 6-13, 6-14 (if applicable).

4. Remove mouthpiece (13) from the breathing hoses.

Hold for later overhaul IAW Table 6-15 (if applicable).

5. Release quick lock lever and remove the quick lock collar (5) and cover (10) from the breathing bag.

Hold for later overhaul IAW Table 6-11 (if applicable).

6. Remove ExtendAir canister (7) from breathing bag.

Hold for later overhaul IAW Table 6-10 (if applicable).

7. Remove DV (6) from the breathing bag using lug spanner 490935 by first removing seal spanner nut (1, VE CR488150) and seal ring (2, VE CR488150)

8. Push DV into breathing bag and then out of the breathing bag through the breathing bag collar.

9. Loosely reinstall seal spanner nut (1, VE CR488150) and seal ring (2, VE CR488150) onto DV.

10. Remove the IP hose (4) from the DV using a17mm wrench.

Hold for later overhaul IAW Table 6-9 (if applicable).

11. Remove the IP hose from the bypass (3) using a 14mm wrench.

Hold for later overhaul IAW Table 6-8 (if applicable).

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Check Procedure - Preliminary disassembly continued Supplemental info

12. Remove the bypass from the breathing bag:

a. Hold the bypass body on the outside of the breathing bag with your other hand or if needed use a 14mm wrench.

b. Remove the spanner nut (8, VE CR488140) located inside the breathing using lug spanner 490935.

c. Once removed, discard soft washer (6, VE CR488140) and then loosely reassemble washer (7, VE CR488140) and spanner nut (8, VE CR488140) back onto the bypass body.

d. Hold for later overhaul IAW Table 6-7 (if applicable).

Preliminary disassembly complete.

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Table 6-3 VRGA Disassembly/Reassembly

Check Procedure – VRGA disassembly Supplemental info

WARNING! Failure to completely depressurize the O2 cylinder can result in serious injury or death.

1. Remove the FME plug and crack open the VRGA to slowly depressurize the VRGA. When you suspect that the VRGA is depressurized, open valve fully and verify that that no gas is escaping from the VRGA outlet fitting before proceeding further. Close valve.

2. Remove the connector nipple (6) and the knurled nut (7) from the VRGA body (1) using a 4mm allen key 480769.

3. Remove and discard both o-rings (5) and (8) from connector nipple

(6).

4. Remove and discard burst plug (4) from body (1) using a 3/8” wrench 488375.

5. Remove handwheel retainer nut (30) using the modified screwdriver 111399.

6. Remove washer (29), spring (28), handwheel (27), washer (26) and on/off indicator ring (25).

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Check Procedure - VRGA disassembly continued Supplemental info

7. Remove bonnet (24) using a 19mm wrench and the following:

a. Remove and discard o-ring (23) from bonnet.

b. Remove stem (18).

c. Remove and discard Teflon washer (19).

d. Remove metal spacer (20).

e. Remove and discard o-ring (21).

f. Remove and discard back-up ring (22).

8. Remove and discard valve seat (17) using the stem (18) as a removal tool.

9. Inspect machined seating surface for cleanliness and damage.

10. Remove O2 gage (3) by removing the gauge swivel axis (11, VE

CR488095) using a 16mm wrench.

Hold for later overhaul IAW Table 6-5 (if applicable).

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Check Procedure – VRGA disassembly continued Supplemental info

11. Remove fill port (9) using a 19mm wrench.

Hold for later overhaul IAW Table 6-6 (if applicable).

12. Remove cap protector (16).

13. Remove piston cap (15) using lug spanner 490935.

14. Remove piston from piston cap.

15. Remove and discard o-rings (11) and (14).

16. Remove and discard HP seat (12) using seat extraction tool 116236.

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Check Procedure - VRGA disassembly continued Supplemental info

17. Remove spring (10) from VRGA body (1).

18. Insert O2 cylinder (1, 488120) into cylinder clamp 488371. Secure cylinder clamp into a clean shop vise.

CAUTION: Be careful not to damage the exposed male threads on both ends of the VRGA body during overhaul procedures.

19. Remove VRGA body (1) from O2 cylinder using a 28mm wrench

488376.

20. Remove and discard o-ring (2) from VRGA body (1).

Hold O2 cylinder for visual inspection and hydrostatic test IAW Table 6-4 (if applicable).

VRGA disassembly complete

488021 - Ed. 04/03/2021 CH3–34/104

Check Procedure – VRGA Reassembly Supplemental info

NOTE: All new o-rings shall be lubricated IAW paragraph 4-3.5. CHRISTO-LUBE® MCG 111

1. Install o-ring (2) onto VRGA body male cylinder threads.

2. Lubricate the first 4 or 5 male cylinder threads of the VRGA body and then hand tighten onto the O2 cylinder.

3. Insert the O2 cylinder into the cylinder clamp 488371. Secure cylinder clamp into a clean shop vise.

CAUTION: Be careful not to damage the exposed male threads on both ends of the VRGA body during overhaul procedures.

4. Tighten VRGA body (1) onto O2 cylinder using a 28mm torque wrench. Torque to 3 m.kg.

5. Install o-rings (11) and (14) onto piston (13).

6. Insert the HP seat (12) into the end of the piston (13) with chamfer (bevel) facing outward. Do not lubricate HP seat.

NOTE: This can be done by placing the chamfered side down on a clean hard surface and pushing the piston over it.

7. Insert piston (13) into piston cap (15).

8. Install spring (10) into VRGA body (1).

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Check Procedure - VRGA Reassembly continued Supplemental info

9. Lubricate the first 2 male threads on the VRGA body (1).

10. Install piston cap (15) hand tight and then use the lug spanner to create metal-to-metal contact of the piston cap and the metal lip of the VRGA body (1) as shown by the pointer.

CAUTION: Ensure that the cap has been tightened as described. A cap that is not fully tightened can cause the VRGA to have excessively high

IP.

11. Install cap protector (16) onto piston cap (15).

12. Place the larger eye of the FME plug retainer (4, VE CR488110) onto the male threads of the fill port before installing it into the VRGA body.

NOTE: The fill port and O2 gauge male and female threads are identical.

Refer to VE CR488100 to ensure that the fill port is installed onto the correct face (side) of the VRGA body.

13. Place VRGA on its side and carefully center the spring (8, VE

CR488110) into VRGA body. Then carefully install the fill port so that the bottom of the fill port check valve (9, VE CR488110) is perfectly aligned with the top of the spring before installing finger tight.

14. Using a 19mm torque wrench, torque fill port to 1.5 m.kg.

NOTE: FME plug (2, VE CR488110) will need to be temporarily removed from the fill port to accommodate the socket during the torque.

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NOTE: The O2 gauge and fill port male and female threads are identical.

Refer to VE CR488100 to ensure that the O2 gauge is installed onto the correct face (side) of the VRGA body.

15. Install O2 gauge (3) into VRGA body (1). Torque gauge axis (11, VE CR488095) to 1.5 m.kg.

CAUTION: Ensure that valve seat threads are lightly lubricated only and that no lubricant comes in contact with the seat.

16. Lightly lubricate threads (only) of the valve seat (17) and place onto end of the valve stem (18).

17. Install valve seat (17) into VRGA body (1) using the valve stem (18) as an installation tool. Tighten with fingers.

18. Temporarily install the handwheel (27) to further tighten seat against the machined seat of the VRGA body. Excessive force is not required.

CAUTION: Failure to tighten valve seat will cause damage when torque is applied to the bonnet.

19. Remove handwheel and valve stem when complete.

20. Valve stem (18) pre-assembly:

a. Install white Teflon washer (19) onto stem.

b. Install metal spacer (20) onto stem.

c. Install o-ring (21) onto stem.

d. Install back-up ring (22) onto stem.

NOTE: Ensure that the concave side of the back-up ring “saddles” the o-ring.

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21. Install pre-assembled valve stem into valve seat.

22. Install o-ring (23) onto bonnet (24) and then lubricate bonnet threads.

23. Install bonnet onto valve stem hand tight.

24. Using a 19mm torque wrench, torque bonnet to 1 m.kg.

25. Install washer (26) onto bonnet.

26. Install on/off indicator ring (25) onto bonnet.

a. When indicator ring bottoms out, turn CCW until the corners of the square stem point towards the square cutouts of the indicator ring.

b. Turn CCW and additional 90 degrees.

NOTE: Cycle valve handwheel on and off to ensure smooth operation and proper orientation of the indicator ring. The indicator ring alignment is critical to allow full range of motion of the valve. Full range is approximately 1⅓ rotation.

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27. Install handwheel (27) onto valve stem (18).

28. Install spring (28), washer (29) and retaining nut (30) using the modified screwdriver 111399.

CAUTION: Do not lubricate burst plug.

29. Install burst plug (4) into VRGA body (1).

30. Using a 3/8” torque wrench, torque burst plug to 1.2 m.kg.

31. Install o-rings (5) and (8) onto connector nipple (6).

32. Install connector nipple (6) and connector nut (7) into VRGA body.

33. Using a 4mm hex bit, torque connector nipple to 0.5 m.kg.

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34. Install FME plug and set VRGA aside for later testing and final assembly.

35. Hold for final assembly and testing.

VRGA Reassembly complete

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Table 6-4 O2 Cylinder Visual Inspection and Hydrostatic Testing

Check Procedure - O2 cylinder removal Supplemental info in serious injury or death.

1. Remove the FME plug and crack open the VRGA to slowly depressurize the VRGA. When you suspect that the VRGA is

2. Insert the O2 cylinder (1) into the cylinder clamp 488371.