Kirby Morgan KMB-18 A/B, KMB-28B Operation And Maintenance Manual

Kirby Morgan Band Mask

KMB-18 A/B and KMB-28B

Operations and Maintenance Manual

KMB 18 & 28 MANUAL

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KMB 18 & 28 MANUAL

Kirby Morgan Band Mask

KMB 18A/B and KMB 28

Operations and Maintenance Manual

KMDSI Part # 100-002

Kirby Morgan Dive Systems, Inc.

425 Garden Street

Santa Barbara, CA 93101, USA

Telephone (805) 965-8538

FAX (805) 966-5761

E-Mail: Info@KMDSI.com

Web Site:www.KMDSI.com

DANGER: Diving with compressed breathing gas is a hazardous activity. Even

if you do everything right there is always the potential for serious injury or death.No one piece of diving equipment can prevent the possibility that you may be injured or killed any time you enter the water. We do not herein make any effort to teach the principles of diving. It is our assumption the reader is a qualified diver.

Manual prepared by Marine Marketing and Consulting & Kirby Morgan Dive Systems, Inc.

SuperLite-17, SuperLite-27, SuperLite-17C, SuperLite-17K, Band Mask, Kirby Morgan, DCS-2A and KMB are all registered trademarks of Kirby Morgan Dive Systems, Inc. Use of these terms to describe products that are not manufactured by KMDSI is not permitted. © Copyright 1970-2003 Kirby Morgan Dive Systems, Inc. All rights reserved. This manual is made available for the express use of owner of this Kirby Morgan product. No part of this manual may be reproduced, stored in any retrieval system, or transmitted, or used in any form or by any means, whether graphic, electronic, mechanical, photocopy , or otherwise by technology known or unknown, without the prior written permission of Kirby Morgan Dive Systems, Inc.

Document # 010518001

KMB 18 & 28 MANUAL

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KMB 18 & 28 MANUAL

Contents

DEFINITION OF SIGNAL WORDS .................................................................................................. 1

IMPORTANT SAFETY INFORMATION ........................................................................................... 2

WARRANTY INFORMATION ........................................................................................................... 4

Chapter 1 GENERAL INFORMATION......................................................................................... 7

1.1 INTRODUCTION ....................................................................................................................... 7

1.2 KMB 18A, KMB 18 B and KMB 28 BAND MASK CONFIGURATIONS ............................ 10

1.3 DESIGN PURPOSE ..................................................................................................................10

1.4 CONSTRUCTION SPECIFICATIONS .................................................................................... 11

1.5 GENERAL DESCRIPTION...................................................................................................... 11

1.5.1 Gas Flow Systems .................................................................................................................. 11

1.5.2 Auxiliary Gas Supply System................................................................................................. 13

1.5.3 Reducing Carbon Dioxide ...................................................................................................... 14

1.5.4 Main Exhaust System .............................................................................................................14

1.5.5 Communications..................................................................................................................... 15

1.5.6 Hood and Face Seal ................................................................................................................ 15

1.5.7 Hood and Face Seal Retainer Band ........................................................................................ 15

1.5.8 Head Harness or Spider ..........................................................................................................15

1.6 IMPORTANCE OF PROPER MAINTENANCE ..................................................................... 15

1.6.1 Special T ools........................................................................................................................... 15

Chapter 2 OPERATING INSTRUCTIONS.................................................................................. 17

2.1 INTRODUCTION ..................................................................................................................... 17

2.1.1 First Use of Kirby Morgan 18A/B & 28................................................................................. 17

2.2 PRE DRESS-IN PROCEDURE ................................................................................................ 18

2.2.1 Pre-dive Inspection ................................................................................................................. 18

2.2.2 Clean Face Port....................................................................................................................... 19

2.2.3 Check Moving Parts ............................................................................................................... 19

2.2.4 One Way V alve Check ............................................................................................................ 19

2.2.5 Connecting the Band Mask to the Diver’s Umbilical............................................................. 20

2.2.6 Gas Flow Systems Check ....................................................................................................... 21

2.2.7 Sealing Integrity Check .......................................................................................................... 22

2.2.8 Check Communications.......................................................................................................... 22

KMB 18 & 28 MANUAL

2.3 DIVING PROCEDURES .......................................................................................................... 22

2.3.1 Fogging Prevention ................................................................................................................ 22

2.3.2 Bleeding the Umbilical........................................................................................................... 23

2.3.3 Auxiliary Gas System ............................................................................................................. 23

2.3.4 Securing the Band Mask on the Diver.................................................................................... 26

2.3.5 Attaching the Umbilical to the Harness.................................................................................. 27

2.3.6 Diver Check Gas Flow Systems ............................................................................................. 28

2.3.7 Communications Check.......................................................................................................... 28

2.3.8 Diver Ready............................................................................................................................ 28

2.3.9 Water Entry and Descent ........................................................................................................ 28

2.4 EMERGENCY PROCEDURES ............................................................................................... 29

2.4.1 Flooding.................................................................................................................................. 29

2.4.2 Inhalation Resistance.............................................................................................................. 29

2.4.3 Gas Flow Stops....................................................................................................................... 29

2.4.4 Demand Regulator Free Flow................................................................................................. 30

2.5 POST DIVE PROCEDURES .................................................................................................... 30

2.5.1 Removing the Equipment ....................................................................................................... 30

Chapter 3 TROUBLESHOOTING................................................................................................ 31

3.1 GENERAL ................................................................................................................................ 31

3.2 COMMUNICATIONS MALFUNCTIONS .............................................................................. 31

3.3 ONE-WA Y VAL VE MALFUNCTION ..................................................................................... 32

3.4 SIDEBLOCK MALFUNCTION............................................................................................... 32

3.5 DEMAND REGULATOR MALFUNCTION........................................................................... 33

3.6 WATER LEAKAGE INTO BAND MASK............................................................................... 34

3.7 AUXILIAR Y VALVE MALFUNCTION.................................................................................. 34

Chapter 4 INSPECTION/MAINTENANCE TIMETABLE ....................................................... 35

4.1 DAILY MAINTENANCE ......................................................................................................... 35

4.2 MONTHLY MAINTENANCE ................................................................................................. 35

4.3 EVERY SIX MONTHS OR 200 OPERATING HOURS.......................................................... 35

4.4 YEARLY OR EVERY 400 OPERATING HOURS .................................................................. 36

Chapter 5 PREVENTATIVE MAINTENANCE .......................................................................... 37

5.1 INTRODUCTION ..................................................................................................................... 37

KMB 18 & 28 MANUAL

5.2 REQUIRED TOOLS, CLEANING AGENTS, AND LUBRICATING AGENTS.................... 37

5.2.1 Component and Parts Cleaning ............................................................................................. 38

5.2.2 Component and Parts Lubrication .......................................................................................... 38

5.2.3 Teflon Tape ............................................................................................................................. 38

5.2.4 RTV Sealant............................................................................................................................ 38

5.3 GENERAL ................................................................................................................................ 39

5.4 DAILY MAINTENANCE ......................................................................................................... 39

5.5 MONTHLY MAINTENANCE (OR BETWEEN JOBS).......................................................... 41

5.5.1 Communications Inspection ................................................................................................... 41

5.5.2 Lubricate Nose Block O-Rings............................................................................................... 41

5.5.3 ONE-WA Y VALVE ................................................................................................................ 42

5.5.3.1 Disassembly of the One-Way Valve .................................................................................... 42

5.5.3.2 Reassembly of the One-Way Valve ..................................................................................... 43

5.5.4 DEMAND REGULATOR ...................................................................................................... 44

5.5.4.1 Demand Regulator Test for Correct Adjustment, Fully Assembled .................................... 44

5.5.4.2 Inspection of Regulator Body Interior................................................................................. 45

5.5.5.1 Adjustment System Lubrication .......................................................................................... 45

5.5.5.2 Reassembly of Adjustment System .................................................................................... 47

5.6 DEMAND REGULATOR INTERNAL ADJUSTMENT ......................................................... 48

5.7 HOOD AND FACE SEAL ........................................................................................................ 50

Chapter 6 CORRECTIVE MAINTENANCE .............................................................................. 53

6.1 GENERAL ................................................................................................................................ 53

6.2 PORT RETAINER ..................................................................................................................... 53

6.3 FACE PORT .............................................................................................................................. 53

6.3.1 General.................................................................................................................................... 53

6.3.2 Face Port and Nose Block Device Removal........................................................................... 54

6.3.3 Face Port and Nose Block Replacement................................................................................. 55

6.4 COMMUNICATIONS SYSTEM............................................................................................. 57

6.4.1 General.................................................................................................................................... 57

6.4.2 Earphone Inspection ............................................................................................................... 57

6.4.3 Microphone Removal and Replacement................................................................................. 58

KMB 18 & 28 MANUAL

6.4.4 Earphone Removal and Replacement..................................................................................... 59

6.4.5 Waterproof Connector ............................................................................................................59

6.4.5.1 Waterproof Connector Removal .......................................................................................... 59

6.4.5.2 Connector Replacement....................................................................................................... 60

6.4.6 Communications Posts ........................................................................................................... 60

6.4.6.1 Communications Post Removal .......................................................................................... 60

6.4.6.2 Communications Post Replacement .................................................................................... 61

6.5 SIDEBLOCK ASSEMBL Y....................................................................................................... 61

6.5.1 General.................................................................................................................................... 61

6.5.2 Sideblock Assembly Removal ................................................................................................ 62

6.5.2.1 KMB 18A ............................................................................................................................ 62

6.5.2.2 KMB 18B & 28 ................................................................................................................... 62

6.5.2.3 Separating the Sideblock Assembly from the Band Mask Frame ....................................... 63

6.5.3 Sideblock Assembly Replacement.......................................................................................... 64

6.6 DEFOGGER VALVE ................................................................................................................ 66

6.6.1 Disassembly of the Defogger Valve ....................................................................................... 66

6.6.2 Cleaning and Lubricating ....................................................................................................... 67

6.6.3 Reassembly of the Defogger Valve ........................................................................................ 67

6.7 AUXILIARY GAS SUPPLY VALVE ASSEMBLY.................................................................. 68

6.7.1 Disassembly of the Auxiliary Valve Assembly....................................................................... 68

6.7.2 Cleaning and Lubricating ....................................................................................................... 68

6.7.3 Reassembly of Auxiliary Valve .............................................................................................. 69

6.8 MODEL "A" REGULATOR HOSE ASSEMBLY .................................................................... 70

6.8.1 Hose Removal ........................................................................................................................ 70

6.8.2 Inspection, Cleaning, and Lubricating.................................................................................... 70

6.8.3 Hose Replacement .................................................................................................................. 71

6.9 "B" BENT TUBE ASSEMBLY................................................................................................. 72

6.9.1 General.................................................................................................................................... 72

6.9.2 Removal of the Bent Tube Assembly ..................................................................................... 72

6.9.3 Inspection of Bent Tube Assembly ......................................................................................... 72

6.9.4 Replacement of the Bent Tube Assembly............................................................................... 73

6.10 NOSE BLOCK ASSEMBLY................................................................................................... 74

KMB 18 & 28 MANUAL

6.10.1 Nose Block Assembly Removal ........................................................................................... 74

6.10.2 Nose Block Device Replacement ......................................................................................... 74

6.11 BAND MASK FRAME KMB 18A/B..................................................................................... 74

6.12 RUBBER WHISKER .............................................................................................................. 75

6.12.1 Whisker Removal .................................................................................................................75

6.12.2 Whisker Replacement........................................................................................................... 76

6.13 MAIN EXHAUST ASSEMBLY ............................................................................................. 77

6.13.1 Exhaust Valve Removal........................................................................................................ 77

6.13.2 Main Exhaust Body Replacement ........................................................................................ 77

6.14 DEMAND REGULATOR ASSEMBLY ................................................................................. 78

6.14.1 General.................................................................................................................................. 78

6.14.2 Demand Regulator Assembly Removal................................................................................ 78

6.14.3 Disassembly of the Demand Regulator ................................................................................ 79

6.14.4 Inspection of Demand Regulator Parts................................................................................. 80

6.14.5 Reassembly of the Demand Regulator ................................................................................. 81

6.14.6 Unexplained Demand Regulator Steady Flow When Underwater....................................... 83

6.15 ORAL NASAL MASK............................................................................................................ 84

6.15.1 Oral Nasal Mask Removal.................................................................................................... 84

6.15.2 Inspection of Oral Nasal Mask ............................................................................................. 84

6.15.3 Oral Nasal Mask Replacement ............................................................................................. 84

6.15.4 Oral Nasal Valve Replacement ............................................................................................. 84

Chapter 7 ACCESSORIES ............................................................................................................. 85

7.1 INTRODUCTION ..................................................................................................................... 85

7.2 HOT WATER SHROUD INSTALLATION PROCEDURES ................................................... 85

7.3 LOW PRESSURE INFLATOR HOSE INSTALLATION ON THE “B” SIDEBLOCK ........ 87

7.4 WELD LENS ASSEMBLY INSTALLATION INSTRUCTIONS ........................................... 87

7.5 USE OF QUICK-DISCONNECT ............................................................................................. 88

7.6 MASK CARRYING BAG ........................................................................................................ 88

Appendix I Torque Specifictions ..................................................................................................... 89

Appendix 2 Maintenance Log.......................................................................................................... 90

Table of Equivalents ......................................................................................................................... 91

KMB 18 & 28 MANUAL

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KMB 18 & 28 MANUAL

Definitions of Signal Words Used in this Manual

For your protection, pay particular attention to items identified by signal words in this manual. These terms are identified as, CAUTION, WARNING AND DANGER. It is especially important for you to read and understand these signal words.

CAUTION: This word indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices.

WARNING: This word indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

DANGER: This word indicates an imminently hazardous situation, which if not avoided, will result in death or serious injury.

If English is not your native language and you have any difficulty understanding the language of any warnings as they appear in the manual, please have them translated.

WARNING: Este é um aviso importante. Queira mandá-lo traduzir.

WARNING: Este es un aviso importante. Sirvase mandario traducir.

WARNING: Quest è un avviso importante. Tradurlo.

WARNING: Ceci est important. Veuillez traduire.

WARNING: Diese Mitteilung ist wichtig. Bitte übersetzen lassen.

If you have any questions regarding the information in this manual, or the operation of your mask, call Kirby Morgan Dive Systems, Inc. at (805) 965-8538 or E-Mail: Info@KMDSI.com

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KMB 18 & 28 MANUAL

IMPORTANT SAFETY INFORMATION

This Kirby Morgan Band Mask (KMB 18 A/B & 28) diving mask is intended for use only by trained divers who have successfully completed a recognized training course in surface supplied diving.

WARNING: Follow all the instructions in this manual carefully and heed all safety

precautions. Improper use of this diving mask could result in serious injury or death.

DANGER: Kirby Morgan Dive Systems, Inc. (KMDSI) warns all divers who use the

Kirby Morgan Band Mask (KMB 18A/B & 28) to be sure to use only KMDSI original spare parts from a KMDSI authorized dealer. Although other parts, O-rings and fittings may appear to fit on the Kirby Morgan Band Mask (KMB 18A/B & 28), they may not to be manufactured to the same standards maintained by KMDSI. The use of any parts other than KMDSI original parts may lead to equipment failure and accidents.

DANGER: Diving in an environment that is chemically, biologically, or radiologically contaminated is extremely hazardous. Although the Kirby Morgan Band Mask (KMB 18A/B & 28) may be adapted for use in some contaminated environments, special training, equipment, and procedures are necessary. Do not dive in a contaminated environment unless you have been thoroughly trained and equipped for this type of diving.

Read this manual before using or maintaining the mask, even if you have experience with other diving masks. If you have purchased the mask new from a dealer, be sure to send in the warranty registration card so we may keep you informed regarding any safety notices that affect this product. If you resell or loan this mask to another diver, be sure this manual accompanies the mask and that the person reads and understands the manual.

DANGER: Diving is a life threatening occupation. Even if you do everything right there is still the potential for serious injury or death. Diving a Kirby Morgan band mask or helmet cannot prevent accidents, injuries, or death.

WARNING: This mask was completely checked and should be ready to dive as it was shipped from the factory. However, it is always the diver's responsibility to check all the components of the mask prior to diving.

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KMB 18 & 28 MANUAL

This manual is supplied to the original purchaser of this mask. If you have any questions about the use, maintenance, or operation of this mask, or you need another copy of this manual, Part Number 100-002,

contact your nearest KMDSI dealer or Kirby Morgan Dive Systems, Inc. (KMDSI). Telephone:(805) 965-8538, Fax: (805) 966-5761, E-Mail: Info@KMDSI.com

DANGER: Kirby Morgan masks and helmets are not cleaned or lubricated for oxygen service. Using this mask with oxygen percentages above 50% by volume may lead to fire or explosions that can result in serious injury or death.

All Kirby Morgan helmets and masks must not be used with oxygen breathing mixtures in excess of 50% by volume without first insuring all gas transporting components have been cleaned and lubricated for oxygen service. Only oxygen compatible lubricants such as Krytox® and Christo lube® should be used. Lubricants must be used sparingly.

The information contained in this manual is intended to aid the user in optimizing the performance of this helmet. Some of the information will depend on the diving situation and the use of associated equipment. Many countries have specific laws and rules regarding commercial diving. The operating and performance specifications listed in this manual on page 8 is separated into two charts. These charts demonstrate different operation requirements, which are required or imposed by countries or regulating bodies. It is important for the user to understand the rules, regulations, and philosophy imposed by the governing regulating bodies whenever using commercial diving equipment. These charts show the basic operating pressures, depths, and umbilical configurations as required by some

regulating bodies. Whenever Kirby Morgan helmets or masks are used in European Countries, which have adopted the C.E. certification programs they must only be used with C.E. certified components.

Diving operations should only be conducted within the limits of the operational specifications, and in accordance with the rules and regulations established by the governing authority in the specific country

or geographical location where the diving operations are being conducted. Please call Kirby Morgan Dive

Systems, Inc. (KMDSI) regarding any operational or performance questions.

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KMB 18 & 28 MANUAL

Warranty Information

Kirby Morgan Dive Systems, Inc. (KMDSI) warrants every new mask, helmet, or Dive Control System (DCS) to be free from defects in workmanship for a period of ninety (90) days from date of purchase. This warranty does not cover rubber parts or communications components. Should any part become defective due to materials or workmanship during the warranty period, contact your nearest authorized KMDSI dealer. If there is no dealer in your area, contact KMDSI directly at (805) 965-8538, E-Mail: Info@KMDSI.com or Fax (805) 966-5761. You must have a return authorization number (RMA#) from KMDSI prior to the return of any item. Upon approval from KMDSI, return the defective part, freight prepaid, to KMDSI, 425 Garden Street, Santa Barbara, CA, 93101. The part will be repaired or replaced at no charge as deemed necessary by KMDSI.

This warranty becomes null and void if:

1. The product is not registered with KMDSI within ten (10) days of purchase.

2. The product has not been properly serviced and maintained according to the appr opriate KMDSI manual.

3. Unauthorized modifications have been made to the product.

4. The product has been abused or subjected to conditions which are unusual or exceed the product's intended service.

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KMB 18 & 28 MANUAL

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KMB 18 & 28 MANUAL

Head protector

Spider

Free flow knob

Sideblock

Auxiliary valve knob

Port retainer

Port

Equalizing device

One-way valve

Hood

Regulator adjustment knob

Regulator

The KMB 18B Band Mask

(shown with optional Hard Shell)

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STOP!

KMB 18 & 28 MANUAL

BEFORE GOING FURTHER-

Locate the exploded view at the back of this manual. Fold it out and follow the numbers as you read. All the numbers in parentheses in the text refer to the numbers on the exploded drawing. These numbers are called “location” numbers on the parts list. They are used to find the referred to parts on the exploded drawing only. They are not the part number. Always check the part number when ordering to make sure it is correct. Always specify the mask model number as well. There is only one exploded view drawing which includes both the Kirby Morgan Band Mask (KMB 18A) and Kirby Morgan Band Mask (KMB 18B), as well as the Kirby Morgan KMB 28 Band Mask.

CHAPTER 1

GENERAL INFORMATION

1.1 INTRODUCTION

Kirby Morgan Dive Systems, Inc. (KMDSI) started as the Kirby Morgan Corporation in 1965. Kirby Morgan is a registered trademark for our products.

William Bev Morgan started designing and making diving equipment shortly after becoming a breath-hold diver while working as a beach lifeguard in the late 1940's. There was very little equipment available in those early days so it was necessary to make much of his own gear.

During the early 1950's he originated the Los Angeles (California) Underwater Instructor Program for teaching SCUBA divers/instructors, then started Dive 'N Surf, one of the first diving equipment suppliers that integrated Scuba diving instruction into the same operation as sales and service of equipment. He, along with his partners, Bill and Bob Meistrell, designed and manufactured diving equipment that remains a standard in the diving industry today.

In 1957 Morgan sold Dive 'N Surf to his partners. In 1960 he started commercial diving along with designing and making diving equipment for the commercial market.

The Kirby Morgan Corporation was formed to manufacture commercial diving helmets. The copper and brass "heavy gear" or " Standard Dress" helmets were the first manufactured by the com-

Bev Morgan, Chairman of the board,

Kirby Morgan Dive Systems, Inc.

pany. Over the years Kirby Morgan designed, manufactured, and sold many different helmets and masks for commercial divers.

Staying active in commercial diving has contributed to the successful design innovations of KMDSI products. This may be the primary reason for the acceptance of our designs by professional divers. Over the years, Morgan has designed more than forty diving helmets and forty five diving masks.

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KMB 18 & 28 MANUAL

All members of the KMDSI staff participate as part of the Kirby Morgan design team. It would not be possible for us to supply the commercial, military, scientific, and public service diving industries with our equipment without the team of people that make up Kirby Morgan Dive Systems, Inc. (KMDSI)

We feel it is important for the reader to understand that we at KMDSI consider ourselves as only part of the process along the path in diving equipment design. We welcome all input from our customers. The thinking of many good divers, diving equipment engineers, diving medical specialists, diving organization administrators and their supporting personnel has contributed to the current state of the art of diving.

Each piece of gear we manufacture has in it some of the thinking of those who have gone before us. To all the people who give something of themselves to the men and women who work underwater, we express a thank you.

Our extensive dealer network makes it easy to obtain genuine Kirby Morgan replacement parts as well as technical assistance world wide. We have a strong commitment to providing the best diving equipment and service possible.

Kirby Morgan has always concentrated on designing and manufacturing diving equipment that allows most repairs and routine maintenance to be performed by the user. The KMB 18/28 full face mask is no exception. Most routine preventative and corrective maintenance can be accomplished by the user utilizing this manual, the KMDSI Tool Kit and common hand tools.

The side block and regulator are of a U.S. Navy approved design, engineered to provide an optimum flow of breathing gas even under heavy work conditions.

The mask has been tested and conforms to the performance requirements as set forth in Annex

II of Directive 89/686/EEC and as far as applicable, the EN250 (edition Jan 2000) and the E DIN 58 642 (edition Feb 1998). When the mask is used for air diving in countries that conform to C.E. regulations it may be used to a maximum depth of 164fsw (50 msw). I.A.W. EN250.

Only equipment certified and tested according to EN 250/E DIN 58 642 may be used with the KMB 18/28 when conducting diving operations in European EC compliant countries.

Performance of the mask is dependant on many factors including type of breathing gas used, work rate, delivery pressure, umbilical internal diameter, length and number of connections, diving depth and capability of the gas delivery system to provide breathing media at the required CFM or LPM to maintain the optimum static over bottom pressure. Performance of this helmet is measured in volume averaged pressure, resistive effort, formally called work of breathing. Volume averaged pressure is the measurement of average pressures contributed by resistive components within the UBA. This value is normally expressed in Joules/liter. The performance of this mask can be expected to be less than 3.0 J/L when used within the following guidelines.

Operational Specifications and Limitations:

- Maximum depth on air - 220 fsw (67 msw) with the standard exhaust whisker assembly.

- Maximum depth on air - 100 fsw (30 msw) when equipped with the double exhaust whisker assembly*.

Work rate - moderately heavy - 62.5 lpm rmv.

-Umbilical minimum I.D. 3/8” (9.5 mm) of one continuous length (no splice), total length not to exceed 600 feet (182m).

-Required over-bottom supply pressure, 0-l00 fsw (0-30 msw), 1 15-135 psig (8-9.3 bar). 100-150 fsw (30-50 msw),135-225 psig (9.3-15.5 bar). 100-220 fsw (30-67 msw),175-225 psig (12.0-15.5 bar).

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-Gas supply system capable of supplying 4.5 acfm (127.4 BL/min) to the side block assembly at depth.

-T emperature limitations: Use at water temperatures below 36

F (2oC) requires use of hot water

shroud and hot water. The umbilical assembly should be composed of

good quality diving hose that meets industry standards. Generally , gas hose will be married to the communications wire, pneumofathometer hose, and strength member in a manner that will allow the strength member to receive all the strain. There are also good quality umbilicals available that are assembled at the factory using a twisted method which does not require marrying. Regardless of the system used, the umbilical is the divers life line and should always be of excellent quality and maintained carefully.

* This assembly has not been tested for CE compliance. Hooded face masks should NOT be

used for diving in contaminated water situations. The double exhaust is provided for the masks for use during jetting operations. It has been found that the use of a double exhaust assembly can help in the prevention of inversion of the exhaust valve during heavy jetting operations.

KMB 18 & 28 MANUAL

WARNING: High pressure regulators and associated piping systems for surface supplied diving with Kirby Morgan helmets and masks must be capable of delivering a minimum of 4.5 acfm to the diver at depth. Only systems that can deliver this required gas flow should be used. The use of standard SCUBA style regulators stationed top side is unacceptable as there is no provision for adjusting the intermediate pressure supplied to the diver. This can create a dangerous situation where the diver may not receive an adequate supply of air. Only regulators which allow a variable setting for intermediate pressure should be used for umbilical diving.

Many of the parts on the Kirby Morgan Band Mask (KMB 18A/B) are interchangeable with our SuperLite Helmets, and the Kirby-Morgan Band Mask 28. This helps keep inventory costs low for diving companies and independent divers.

The KMB 28 has a durable injection molded plastic frame (17) rather than a fiberglass frame as found in the KMB 18A/B.

The diving control station can be at the surface, in a diving bell, or out of a submerged habitat. The diving control station is the center of the air/gas

The KMB 28 uses the SuperFlow regulator, the KMB 18 uses the large tube SuperFlow 350 regulator.

supply, communications with the diver, and diving procedures.

DANGER: Decompression diving always involves the risk of decompression sickness. Omitted decompression due to loss of gas supply or other accidents can cause serious injury or death. Use of a KMB 18/28 mask cannot prevent this type of injury.

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KMB 18 & 28 MANUAL

Additional differences between the Kirby Morgan Band Mask KMB 18A/B and the Kirby Morgan Band Mask KMB 28 are as follows:

1) The face port (27) in the KMB 28 is a slightly different size than the KMB 18A/B.

2) The main exhaust body (67) is molded into the mask frame in the KMB 28.

3) The exhaust covers on the two masks are slightly different.

4) There is a vacuum formed comfort insert (14) in the KMB 18A/B.

5) The air train in the KMB 28 requires a special standoff (24) for proper mounting of the side block.

It is our hope that the Kirby Morgan Band Mask (KMB 18A/B or KMB 28), will provide comfort and safety to your diving. This manual is our effort to explain the operation, maintenance and use of the Kirby Morgan Band Mask (KMB 18A/ B & 28).

WARNING: We do not herein make any effort to teach the principles of diving. It is our assumption the reader is a qualified diver.

inlet nipple (61b) and jam nut (61c), the two models are identical. The configuration of the KMB 28 is almost identical to the KMB 18B.

The Kirby Morgan Band Mask A (KMB 18A) side block assembly (120a) receives the main and auxiliary gas supplies from hoses that run down in front of the diver. The Kirby Morgan Band Mask 18B (KMB 18B) side block assembly (120b) receives the hoses from over the diver’s shoulder. All “location” numbers that are for the “A’ model will have a small “a” and all “location” numbers for the “B” only will have a small “b”.

Some divers prefer the hoses to go over their shoulder to clear their front when working. Others prefer the hoses to go down their front to prevent fouling. It depends on the type of work and what the diver finds comfortable.

1.3 DESIGN PURPOSE

The Kirby Morgan Band Masks 18A/B & 28 are designed for use with an umbilical.

WARNING: Only under very con-

trolled conditions, i.e., non-moving water (such as swimming pools or calm lakes), can this mask be used with a self contained gas supply. There is no provision for surface swimming once the SCUBA

air supply is depleted.

If there is any information in this manual that is not clear, contact Kirby Morgan Dive Systems, Inc. at (805) 965-8538 for clarification.

1.2 KIRBY MORGAN BAND MASK A (KMB 18A), KIRBY MORGAN BAND MASK B (KMB 18B), AND KIRBY MORGAN BAND MASK 28 (KMB 28) CONFIGURATIONS

The Kirby Morgan Band Mask 18 (KMB 18) is manufactured in two configurations. With the exception of the side block assembly (120a/b), the hose assembly (117a) with its inlet nipple (61a), and the bent tube assembly (117b) with its

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The umbilical is usually composed of at least a gas or air supply hose and communication wire, assembled with waterproof tape to form a single unit. Some umbilicals also have included a hose for hot water, a pneumofathometer hose, and a strength member, such as a cable or strong line. It is imperative that air/gas umbilicals be married to a strength member in a manner that allows the strength member to receive the strain. This will help reduce the possibility of umbilical and umbilical fitting fatigue and possible failure. The umbilical is the diver’s lifeline to the diving control station.

KMB 18 & 28 MANUAL

The diving control station can be at the surface, in a diving bell, or out of a submerged habitat. The diving control station is the center of the air/gas supply, communications with the diver, and diving procedures.

WARNING: High pressure regulators for surface supplied diving with the Kirby Morgan Band Mask 18A/B and KMB 28 mask must be capable of supplying an over bottom pressure of between 115 and 225 PSI. The use of standard SCUBA style regulators stationed top side is unacceptable as there is no provision for adjusting the intermediate pressure supplied to the diver. This can create a dangerous situation where the diver may not receive an adequate supply of air. Only regulators which allow a variable setting for intermediate pressure should be used for umbilical diving.

The surface supplied diver’s mask must provide life support breathing systems, communications components, viewing lens, and many other less important, but vital systems. The Kirby Morgan Band Masks 18A/B and 28 provides these systems in a convenient and comfortable way.

1.4 CONSTRUCTION SPECIFICATIONS

KIRBY MORGAN BAND MASK KMB 18A/B & 28 Weight: 11 pounds

CONSTRUCTION: Mask Frame KMB 18A/B, Fiberglass Mask Frame KMB 28, Xenoy/Polycarbonate mix

HARDWARE: Stainless Steel, Chromed Brass, Polished Brass

CONTROL KNOBS: ABS Plastic LENS: Polycarbonate plastic O-RINGS: Buna-N HOOD: Foam, Open Cell Neoprene

RECOMMENDED LUBRICANTS: Dow Corning #55 O-ring silicone lubricant. Krytox, and Crysto Lube are also acceptable.

OPERATING PRESSURE: 115-225 PSI over ambient. Optimum 150 PSI over ambient

FLOW REQUIREMENTS: 3.2 CFM

COMMUNICATIONS: Earphones - Mylar Cone 8 OHM Oral Nasal Microphone - 8 OHM

1.5 GENERAL DESCRIPTION

1.5.1 Gas Flow Systems

The main gas supply flow from the umbilical enters the system at the adapter (105) and flows through the automatic one-way valve (104) to the interior of the side block assembly (120a/b). The one-way valve (104) or “non-return” is a very important component. It must prevent the flow of gas out of the mask to the umbilical in the event of a sudden lowering of pressure in the supply hose. This can happen due to an accidental break in the hose or a fitting near the surface. Not only would the auxiliary gas be lost if the one way valve failed (concurrent with a hose or fitting break on deck), but the diver would be “squeezed”, a very serious accident. Although we have se-

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KMB 18 & 28 MANUAL

lected the valve for its reliability and quality, inspection and maintenance of this valve must be done regularly. It is very easy to disassemble and inspect. (A rebuild kit for this valve is available, KMDSI Part #525-330).

WARNING: The one way valve must be tested daily, prior to the commencement of diving operations. Failure of the one way valve could cause serious injury or death. Follow the procedures for testing the valve in chapter 2 (sec. 2.2.4) of this manual.

The auxiliary gas comes from a tank of compressed gas worn by the diver. It enters the system through the auxiliary valve (103) when the diver turns the control knob (100) on. The flow then enters the side block, (94a/b).

diver’s warmth and moisture. The flow continues out through the mask main exhaust (66), or into the oral nasal (9) by means of the valve (5), then into the regulator and out through the regulator exhaust (62). The diver can breathe from this flow of gas if the demand regulator malfunctions.

Returning to the side block assembly (120a/b): the other passage for gas is to the regulator (63a/ b). It goes to a hose assembly (117a) on the “A” model or a bent tube assembly (117b) on the “B” model. The flow of gas in the demand regulator assembly (63a/b) is controlled by an automatic valve that supplies gas to the diver on inhalation “demand” only, and shuts off during the exhalation cycle.

The SuperFlow demand regulator (63a/b) senses

WARNING: Never connect the main gas supply hose from the diving station to the auxiliary valve (103). There is no one way valve in the auxiliary valve. If this mistake is made, any break in the supply hose could possibly result in a “squeeze”.

The KMB 18A/B and KMB 28 use a stud (93) and a machine screw (25) to mount the side block assembly (120a/b).

The nut (20), lock washer (19), and flat washer (18) bed solidly on the interior of the mask frame (17) wall securing the side block assembly (120a/ b). Both sources of gas flow through the same passage in the side block body (94a/b) to two exits. One exit is always open to supply gas to the demand regulator assembly (63a/b). The other exit is to the defogger valve (free-flow valve) assembly (83 through 92).

The diver controls the flow of gas through the defogger system with the control knob (85). The flow enters the mask and flows through the air train (21) which directs the gas onto the face port (27) to prevent fogging that forms there from the

Inflator hose connects here.

The “B” sideblock allows you to connect a low pressure hose to your dry suit.

the start of the divers inhalation and opens the flow valve, matching the diver’s need. The regulator continues to match the diver’s inhalation as the rate increases, peaks, then ebbs and stops. When the diver exhales, the supply gas stays off as the exhalation gas flows through the regulator body (39), out the regulator exhaust valve (62), through the whisker (35), and out into the water. The whisker (35) deflects the exhaust bubbles away from the face port (27) to keep the diver’s view clear.

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All Kirby Morgan Helmets and Bandmasks are equipped with a multi turn demand regulator adjustment knob. The purpose of this adjustment knob is to allow the diver the ability to compensate for variations in umbilical supply pressure. This adjustment device operates by simply increasing or decreasing the amount of spring bias tension on the demand regulator inlet valve. The adjustment knob has a range of approximately 13 turns from full in to full out. The intent of this bias adjustment device is strictly to allow the diver to make adjustments for variations in umbilical supply pressure. This adjustment device is not intended as a minimum-maximum device. Minimum and maximum applies to supply pressure only. The adjustment knob should be adjusted by the diver to be at the easiest breathing setting at all times. The exact number of turns required is dependent on the supply pressure. Diving a KMDSI helmet or bandmask with a bias setting greater than that just necessary to keep the demand valve from free flowing increases the work of breathing and reduces the diver's ability to perform heavy work.

The adjustment knob (47) allows the diver to control the regulator for a wide range of incoming gas pressures. Normally, this would be from 115 P.S.I. to 225 P.S.I. over ambient (diver) pressure. It is important to have this control at the diver for the least breathing resistance.

The Kirby Morgan Band Mask 18B and KMB 28 side block is drilled and tapped to accept low pressure inflator hoses. This allows the diver the capability to inflate variable volume dry suits or buoyancy compensators. It is tapped with a 3/8"24 thread orifice, standard for American first stage scuba regulator low pressure auxiliary fittings. The port is shipped plugged at delivery.

KMB 18 & 28 MANUAL

WARNING: When using the side block low pressure inflator port. The Operator should only use high quality hoses with an integrated flow restrictor or a KMDSI flow restrictor PN# 555-720. All hoses must have an in-line restrictor to reduce the gas flow in the event of hose failure. Do not use fitting adapters, standard adapters do not provide an adequate flow restriction. The use of many off the shelf adapters on the side block assembly could expose the low pressure hose fittings to excessive stress. Any failure of an inflation hose will subject the diver to a decreased supply pressure.

1.5.2 Auxiliary Gas Supply System

All divers using Kirby Morgan surface supplied helmets and masks must always have a diver worn auxiliary gas cylinder fitted with a first stage regulator and hose that is connected to the inlet of the auxiliary supply valve (103). The size of the cylinder should be such that will allow the diver to safely ascend to the surface or to a point where the normal gas supply can be restored. The first stage regulator should always be fitted with the KMDSI overpressure relief valve.

WARNING: Be sure the auxiliary air/gas first stage regulator is fitted with an overpressure relief valve. A leaky first stage can overpressure the hose, bursting it and causing a loss of the entire auxiliary air/gas supply and possible physical injury to the diver as the hose whips about. Do not use a high pressure hose as the system on the helmet is not designed for high pressure.

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KMB 18 & 28 MANUAL

The KMDSI Overpressure relief valve, part number 200-017, has been manufactured in two different flow rates. The original valve had a lower flow rate that the current valve. The current valve has been marked in two ways, the first being a groove around the flats of the hex. Currently the valve is marked with a groove around the top of the body. These are the same valve, just different marks.

Shown are the three versions of the over pressure relief valve

DANGER: Your auxiliary air/gas supply on a deep mixed-gas dive is extremely limited. All divers must be aware of exactly how long their bailout bottle will last at depth. For example, a diver breathing one cubic foot of air a minute at the surface will use a 50 cubic foot bailout bottle in approximately 7 minutes at 198 FSW while at rest.

1.5.3 Reducing Carbon Dioxide

It is important to reduce the internal volume of the mask that the diver is breathing through. Carbon dioxide (CO2) can build up if proper flushing does not occur. A rubber oral nasal mask (9) is located inside the mask to fit over the diver’s nose and mouth. The oral nasal (9) attaches to the regulator mount nut (8). This separates the breathing gas flow from the larger gas space on the interior of the mask, and this in turn reduces carbon dioxide buildup.

WARNING: Always be sure the oral/ nasal valve is properly mounted in the oral nasal mask. If the valve is mounted improperly or absent this can lead to a higher CO2 level inside the mask. A higher CO2 level can cause dizziness, nausea, headaches, shortness of breath, or blackout. This can also increase the probability of decompression sickness. The correct flow of gas is from the mask into the oral nasal.

DANGER: Do not confuse the oral/ nasal valve with the main exhaust valve. They are not the same thickness. The main exhaust valve is much thicker. Using the main exhaust valve in the oral nasal valve body will restrict the air flow to the diver. Using the oral nasal valve in the main exhaust could cause water to leak into the mask.

1.5.4 Main Exhaust System

The main exhaust system (64,65,66,67) is located at the bottom of the mask frame (17). Breathing gas exiting through this valve automatically purges water from the interior of the mask. This happens naturally because the valve (66) is the lowest part of the mask during normal working or swimming conditions. The cover (65) may be removed by unscrewing the two screws (64) . Removal of the cover (65) permits access to the rubber mushroom valve (66). The main exhaust body (67) on the KMB 18 is held in place by three screws (69). (Note: The main exhaust body is molded directly into the mask frame on the KMB 28.)

The rubber mushroom valve (66) is designed to present a resistance to the flow of exhaust gasses. This is necessary to prevent the demand regulator (63a/b) from turning on a steady flow when the diaphragm (52) is positioned lower than the main exhaust (66) during a dive. The diver does not encounter this resistance as he exhausts out of the regulator exhaust.

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KMB 18 & 28 MANUAL

1.5.5 Communications

The Kirby Morgan Band Mask (KMB 18A/B and

28) communications system is very simple. For two wire (push to talk) communications systems, the left earphone (11) with the longer wire, and the right earphone (10) with the shorter wire, are wired in parallel with the microphone (12) to the communications posts (73). These posts (73) are also known as “bare wire” connectors. The wire that is part of the umbilical bundle is connected to these connectors.

The KMB 18A/B & 28 may also be fitted with a waterproof connector (80). This system comes standard with a terminal block (82) that is used with four wire communications, also known as “round-robin” systems. The terminal block can also be wired for two wire systems if preferred.

Electrical signals are sent to, and received from, the surface through the umbilical wires. An amplifier boosts the signals to the desired volume for the surface and the diver. The diver is always “on” in a two wire system, except when the tender pushes a switch to talk to the diver. In a four wire system, both top side and the diver can speak at the same time, just as you would on a telephone.

1.5.7 Hood and Face Seal Retainer Bands (15, 16, 68)

The top band (16) and the bottom band (68) fit around the hood and face seal combination (2) and clamp it firmly to the mask frame (17). Two screws (15) hold these bands in place. Five spider “hooks” consisting of stainless steel posts welded to the retainer bands (16,68) are located on the top and bottom bands. The top band (16) has three stainless steel posts. The bottom band (68) has two stainless steel posts.

DANGER: The bands must be tightened properly or the mask frame may separate from the hood and face seal. If this happens the diver can drown and death may result.

1.5.8 Head Harness or “Spider”

The five legged head harness or “spider” (1) is a simple and convenient method of keeping the mask in place against the diver’s face. The multiple holes punched in each leg allow adjustment to fit any size head. It will be more comfortable if the lower rear or neck area is as low as possible on the diver’s neck. If this lower portion of the spider (1) is too high, it will cause the face seal to push up on the chin causing discomfort.

1.5.6 Hood and Face Seal

The hood and face seal (2) is fabricated from foam neoprene and open cell foam. The open cell foam forms a comfortable cushion that pushes the sealing surface of the foam neoprene against the diver’s face.

1.6 IMPORTANCE OF PROPER MAINTENANCE

Although the Kirby Morgan Band Mask KMB 18A/B is a rugged piece of equipment, proper care and maintenance is essential. The demand breathing system is simple in design but subject to malfunction if not properly maintained. Nor-

The hood incorporates built-in pockets that are open to the interior of the mask frame (17). These pockets retain the earphones (10,11). It is very

mal wear requires periodic internal adjustment to the regulator. This will assure the diver of easy breathing.

easy to remove the earphones for maintenance.

1.6.1 Special Tools

If the standard hood does not fit your head comfortably, other sizes are available from your KMDSI dealer.

A Regulator Adjustment Tool Kit (KMDSI Part #525-620) containing four special adjustment tools is available for internal adjustment of the demand regulator assembly (63a/b). These tools make regulator adjustment much easier. The tool kit comes in a convenient, wallet sized pouch with instructions.

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KMB 18 & 28 MANUAL

DANGER: Without correct, regular maintenance, your mask will not function properly. A poorly functioning mask can cause a fatal accident.

WARNING: When purchasing spare parts, always insist on Kirby Morgan Genuine Parts. Although other parts may look the same, they may not be manufactured to the same standards of quality. Improperly manufactured parts can cause accidents.

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CHAPTER 2

OPERATING INSTRUCTIONS

2.1 INTRODUCTION

This section provides the manufacturer’s advice on how to use the Kirby Morgan 18A/B and 28 Band Masks. The use of these diving Band Masks will vary with the type of work and environmental conditions.

DANGER: The basic procedures of donning and removing the Kirby Morgan 18A/B or 28 will be similar for every job. A proper training program in a calm, clear body of water must be undertaken. If the diver has not used the Kirby Morgan 18A/ B or KMB 28 before, he must not go on a job without proper training. Death could result due to a lack of familiarity with the mask.

KMB 18 & 28 MANUAL

Be sure to complete the enclosed warranty card and return it to KMDSI immediately. No warranty claims will be honored without a satisfactorily completed warranty card on file at KMDSI. The card enables KMDSI to know what unit you have so we can contact you in the event of a safety notice being issued for this product. It is your responsibility to keep the factory notified of any change of address you may experience.

CAUTION: It is the responsibility of the end user to register their ownership of this mask with Kirby Morgan. If the mask is not registered KMDSI has no way to contact you regarding product upgrades.

Divers that are familiar and trained in the use of

WARRANTY INFORMATION

previous mask designs of Kirby and Morgan (Models 8, 9, 10, the Navy MK. 1, the SuperLite17A/B, or the SuperLite-27) will find the Kirby Morgan 18A/B and 28 to have the breathing system controls located in the same position and the operation of the Band Mask will be similar.

Kirby Morgan Dive Systems, Inc. warrants every new mask, helmet, or Dive Control System (DCS), to be free of defects in workmanship for a period of ninety (90) days from date of purchase. This warranty covers all metal, fiberglass, and plastic parts. This warranty does not cover rubber parts, communications components, or Band Mask

The numbers appearing in parentheses are “loca-

hoods.

tion” numbers on the parts list, which appear on the “blowapart” illustration at the end of this manual. You should fold out the blowapart illustration to view while you read this section.

Should any part become defective, contact your nearest authorized KMDSI dealer for a replacement.

This warranty becomes null and void if:

2.1.1 First Use of Kirby Morgan 18A/B & 28

1) The product is not registered with KMDSI within ten (10) days of purchase.

When you first receive your Kirby Morgan KMB 18A/B or KMB 28, carefully unpack it and examine it for any damage that may have occurred during shipment. Use the inspection sheet provided to ensure that no damage has occurred during shipment. The purchaser must contact the freight carrier and/or the KMDSI dealer if the

2) The product has not been properly serviced and maintained according to the appropriate KMDSI manual.

3) Unauthorized modifications have been made

4) The product has been abused or subjected to conditions which are outside normal diving conditions or exceed the product’s intended service.

Band Mask has been damaged in shipment.

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KMB 18 & 28 MANUAL

2.2 PRE DRESS-IN PROCEDURE

Before dressing in for a dive, inspection of the Band Mask system must be made to be sure it is in proper working order. This must be done well in advance of the dive, so any problems can be fixed without delaying the dive. The following steps are part of the recommended daily maintenance which is also in Section 4.1.

DANGER: All parts on the Kirby Morgan 18A/B must be adjusted to their proper torque specifications. See Appendix 1 for a complete listing of torque specifications for each part. Failure to adjust parts to the recommended specifications could lead to Band Mask failure and accidents. This could be fatal.

2.2.1 Pre-Dive Inspection

Inspect the exterior and interior of the Band Mask.

1) The demand regulator cover assembly (51) must not be dented.

2) Inspect the regulator hose assembly (117a) on the “A” model, and the bent tube assembly (117b) on the “B” model. There must be no dents or kinks in the bent tube assembly. The hose assembly must be in good shape.

3) Inspect the face port (27). It must be in good condition.

4) Check the inside of the Band Mask. Be sure the communications wires are hooked up and there are no loose nuts. Check the wire lugs to make sure they are not touching each other. This would cause a short (no communications).

5) Inspect the oral nasal mask (9). Make sure it is on the regulator mount nut (8) properly.

6) Check the screws (29) on the port retainer (28). They must be adjusted to the proper torque setting (12 inch pounds (13 kg cm)) per the specifications in Appendix 1 of this manual. Binder head screws are used in this application for their self locking characteristics. Overtightening will strip out the threaded inserts in the Band Mask frame

(17).

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DANGER: Never use RTV to glue on the port retainer or to hold the threaded inserts in the mask if they are loose. If the RTV fails it could cause the mask to flood and lead to drowning. This can be fatal.

7) Check the spider (1) to ensure there are no tears or cracks in the material. If the spider is worn or cracked it must be replaced. All five “legs” of the spider must be present.

DANGER: The spider must be in good condition. If it is worn or cracked it could fail during the dive. This could cause the mask to flood or come off the diver’s head. This could lead to drowning.

8) Check the hood and face seal (2). The hood must be in good condition with no tears or rips. The face seal must be properly glued to the hood. If it is not, or there are tears in the face seal this will cause the regulator to free flow.

CAUTION: A torn face seal will cause the regulator to free flow. This could lead to a rapid consumption of the diver’s air supply if bottled breathing gas is being used.

9) Check the screws (15) that hold the bands (16 & 68) in position. They must be adjusted to the proper torque setting (see torque specs pg. 89) When the screw are adjusted properly, the hood and face seal cannot be moved from under the bands.

10) Be sure to inspect the bands themselves (16 &

68). The welds must show no signs of cracking or parting.

DANGER: If the bands become loose the hood and face seal could separate from the mask. This would cause the mask to flood which could cause drowning.

2.2.2 Clean Face Port (27)

Remove any sand or dirt on the interior of the face port (27) which might cause scratches when antifogging solution is applied prior to the next dive.

KMB 18 & 28 MANUAL

Fig. 2.1 Clean the face port prior to use.

2.2.3 Check Moving Parts

Check all moving parts, such as the regulator adjustment knob (47), the defogger control knob (85), auxiliary knob (100), and the nose block device knob (34) to ensure smooth and proper operation.

Fig.2.2 Moving parts, such as the regulator adjustment knob must be checked before the Band Mask is put on

line.

2.2.4 One-Way Valve (104) Check

There are two ways to check the one-way valve (104). Check both ways if possible.

1) Leaving the auxiliary knob (100) open (on) and not hooked up to the supply hose, try to suck air out of the adapter (105). If any air comes out, the one-way valve must be replaced.

WARNING: The one way valve must be tested dailly, prior to commencement of diving operations. Failure of the one way valve could cause serious injury or death.

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KMB 18 & 28 MANUAL

2) Prior to attaching (or pressuring up) the umbilical, close the auxiliary valve (103), and attach and pressure up the auxiliary hose. Shut off the defogger control knob (85) and screw in the adjustment knob (47) on the regulator all the way. With the auxiliary hose pressurized, turn on the auxiliary valve knob (100). If any gas escapes out the adapter (105) or (if attached) into the unpressurized umbilical hose, the one-way valve (104) is faulty and must be replaced. Flow into the unpressurized umbilical hose can be heard. A one-way valve repair kit is available for rebuilding these valves (KMDSI Part # 525-330). Contact KMDSI at (805) 865-8538 if you have any questions regarding rebuilding your one-way valve.

2.2.5 Connecting the Band Mask to the Diver’s Umbilical

When you connect the hose to the Band Mask, be sure to use a wrench to hold the adapter, or inlet fitting, (105), and a second wrench to turn the fitting on the hose. If this is not done, the adapter (105) will turn inside the one-way valve (104). If this happens repeatedly the threads will wear and the valve will need to be replaced. The connection between the hose and the Band Mask must only be made up “snug”. Excessive force will deform and ruin the adapter (105). A second wrench must be used when the Band Mask is disconnected as well, otherwise the adapter (105) and/or the one-way valve assembly (104) may become loose and fail to make a seal. If this happens it is necessary to remove the adapter, clean off all the thread tape, and reseal it using Teflon tape.

Fig. 2.3 Always check the one-way valve prior to diving.

WARNING: Never dive if the oneway valve is not operating properly. If the hose breaks near the surface a serious injury could result to the diver’s lungs and/or eyes. In extreme cases this could be fatal.

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Fig. 2.4 Always use two wrenches to connect the umbilical to the KMB 18A/B or 28.

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Kirby Morgan KMB-18 A/B, KMB-28B Operation And Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual