Kirby 37 appendix Removal of the Bent Tube Assembly, Inspection of Bent Tube Assembly

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Kirby Morgan 37 & 57

7.6 Bent Tube Assembly

7.6.1 General

The bent tube assembly provides breathing gas flow from the side block assembly to the regulator assembly on the Kirby Morgan 37. Both ends of the bent tube assembly disconnect for complete removal. The O- ring and the Teflon O-ring should be replaced during normal overhauls or any time these components are deemed unserviceable.

These components do not require replacement during field repairs providing a careful visual inspection does not reveal wear or damage. All soft goods should be carefully cleaned in accordance with Chapter 6 prior to inspection for reuse.

7.6.2Removal of the Bent Tube Assembly

Tools Required:

11/16 inch Open-end Attachment on Torque Wrench

7/8 inch Open-end Attachment on Torque Wrench 7/8 inch Open-end Wrench

1)Always start removal of the bent tube at the side block end. The free swiveling mount nut on this end of the bent tube can be unthreaded completely and can slide down the tube.

2)The inlet nipple has a jam nut that locks the mount nut in place. With one wrench, hold the bent tube mount nut. With another wrench, turn DOWN the jam nut, backing it away from the mount nut. The mount nut can then be rotated until free of the regu- lator inlet nipple threads. It can be pushed up the bent tube.

3)With the two mount nuts free; the bent tube as- sembly can be pulled straight out of the regulator inlet nipple. The bent tube assembly can be rotated back and forth to aid removal.

7.6.3Inspection of Bent Tube Assembly

Clean the bent tube in accordance with Chapter 6. The O-ring at the regulator end should be cleaned and inspected whenever the bent tube is removed.

Replace the bent tube if it is excessively scratched dented or compressed deeper than 1/8 inch. If the helmet has been used for burning jobs, carefully check for erosion of the metal or severe corrosion. Replace if any erosion is present or integrity is in question. Keep in mind the bent tube is a critical component that routs breathing gas to the helmet systems.

Always start removal at the side block end.

Loosening the jam nut.

Replace the O-ring on the bent tube if it is worn or damaged.

WARNING

Do not wrap the bent tube with tape, ropework, springs, hose wrap, or other items. This will prevent daily inspection of the bent tube. In addition, some of these items may trap moisture, which could lead to corrosion and failure of the bent tube.

If the tube fails, this could lead to a rapid depletion of the diver’s breathing gas sup- ply. This could lead to serious personal injury or death.

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© Copyright 1970-2008 Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 080508001

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Contents Kirby Morgan 37 IntroductionOne Way Valve Tighten to 150 inch lbs Newton Meters with a torque wrench Correct assembly order of the one way valveGeneral Side Block AssemblySide Block Assembly Removal Separating the Side Block Assembly from the Helmet ShellAir Train Gasket Thin putty knife helps to remove the side blockComponents of the Side Block & Air Train To suffocation Could lead to drowningDiver cannot use the free flow system as Source of breathing air. This could leadDefogger Valve Disassembly of the Defogger ValveCleaning and Lubricating Clean all the metal parts to remove saltsReassembly of the Defogger Valve Side Block assembly and it’s associated partsRemove the valve stem Emergency Valve AssemblyValve Body Valve Stem Washer Packing nut Reassembly of Emergency ValvePacking Knob Lock nut Spring Leak Testing the EGS Valve Inspection of Bent Tube Assembly Bent Tube AssemblyRemoval of the Bent Tube Assembly Kirby Morgan 37 Installation Bent Tube Assembly Tool Kit with pouch SuperFlow Demand RegulatorGeneral Regulator Information Remove the demand regulator clamp Screw the regulator adjustment knob out for removalInspect the washer and o-ring Reassembly of the SuperFlow 350 Regulator Adjustment SystemShake out the spacer, spring set, and piston Regulator mount nut must be removed to remove the regulator SuperFlow 350 Demand Regulator Removal from HelmetDemand Regulator Kirby Morgan 37 Disassembly of the SuperFlowSuperFlow 350 regulator assembly Castle Wrench and inlet valve On the silicone sealant tube and Material Kirby Morgan 37 Inspection of SuperFlowDemand Regulator Parts Use silicone sealantPage Valve seat Adjustment end of the SuperFlow 350 regulator Install the retaining pin in the adjustment knobKirby Morgan 37 Test the response of the purge button Kirby Morgan 37 Tuning the SuperFlow 350 RegulatorUse the disk end of the Kmdsi wrench to bend the lever down Page Press the cover over the diaphragm Inspection of Oral/Nasal Oral/NasalOral Nasal General Information Oral/Nasal RemovalKirby Morgan 37 Oral/Nasal Replacement Exploded view of the Quad-Valve exhaust system Quad-Valve Exhaust AssemblyQuad-Valve Assembly Removal Page Whiskers must be aligned properly on the exhaust main body SuperFlow Regulator Exhaust Valve ReplacementQuad-Valve Assembly Installation Water Dump Valve Removal Water Dump Valve ReplacementWater Dump Exhaust Body Water Dump Valve Body Removal101 Reinstalling the Quad-Valve Exhaust Assembly102 SuperFlow Stainless Balanced Regulator103 Kirby Morgan 37 Adjusting the SuperFlowRemove the bent tube and the bent tube adapter 104 105 Bent tube adapterExploded view of SuperFlow 450 regulator 106 107 108 Install the o-ring in the bent tube adapter109 Kirby Morgan 37 SuperFlow 450 Regulator RemovalBe sure to remove and set aside the whisker spacers 110 Kirby Morgan 37 SuperFlow 450 DisassemblySuperFlow 450 flex knob assembly 111 RingDetails of the SuperFlow 450 main tube and associated parts Exhaust valve insert Retainer ring Kirby Morgan 37 AssemblySuperFlow 450 Regulator Regulator Body113 Install the inlet valve in the main tube114 115 Tighten the cover hand tightMake sure the lock clip fully engages the packing nut 116 Kirby Morgan 37 SuperFlow 450 Regulator Installation117
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