Assessments - 2, GPA: 5
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The breathing systems on all Kirby Morgan helmets and masks are simple and highly reliable. The fact that they can continue to operate when the components are not in a well-maintained condition can cause divers to become complacent about maintenance. Your life depends on the correct function of this equipment! While Kirby Morgan helmets and masks are simple to maintain, like any type of life support equipment, they do require regular periodic maintenance to function properly. All parts disassembled should be thoroughly cleaned using the methods described in the Appendix in the rear of this manual. Components that require the use of lubricants, sealing and thread locking compounds should also be maintained. Most fasteners have a torque value, it is imperative that all fasteners which have a torque value be tightened to the torque specifications as outlined by the procedure, or as listed in appendix 1. If in doubt as to the proper torque setting, contact your local authorized repair facility or KMDSI. 7.2 One Way Valve NOTE: The one-way valve assembly should be disassembled, cleaned and the three O-rings should be replaced at least annually. Damaged and/or corroded parts should be replaced. A repair kit is available for replacement parts (525-330). Use two wrenches or hold the hex part of the body in a vise while removing or turning the seat with a wrench. Do not use pliers on the main body of the one- way valve. You may damage the valve if pliers are used. CAUTION 7.2.1 Disassembly Of The One Way Valve Tools Required: Soft Jaw Vice 1 inch Open End Wrench Attachment on Torque Wrench (If no vise is available use a backup 1 inch open end wrench) To disassemble and inspect the one way valve assembly: 1) The one way valve assembly must be removed from the side block. Use the open end wrench to remove it. 2) After the one way valve has been removed, use two wrenches or hold the hex part of the body in a soft jaw vise while removing the seat with a wrench. As the seat is removed, the wiper and the O-ring will slide out in place in a groove on the seat. The © Copyright 1970-2008 Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 080508001 Kirby Morgan 37 & 57 Wiper Correct assembly order of the one way valve. AdapterSeatO-ringO-ringPoppetSpring O-ring Body poppet and the poppet O-ring usually come out in the seat being followed by the spring. The only functional part remaining in the valve body is a non-moving, pressed-in cage. The function of the cage is to prevent the poppet O-ring from blowing out of place during high flows. Do not remove the pressed in cage. This can only be done at the factory. 3) Inspect the body interior for foreign matter of any type and clean, if necessary. Clean in accordance with the cleaning instructions in Chapter 6. If corrosion is present, clean using the acidic solution as outlined in Chapter 6. 4) Inspect the seat, wiper, O-ring, poppet O-ring and poppet for wear, replace if necessary. Be sure each part is clean and all components are lightly lubricated with the appropriate lubricant. A repair kit is available for replacement parts. (Part #525-330) 5) Be careful to wipe the poppet and poppet O-ring thoroughly, removing nearly all silicone to prevent foreign materials from sticking to these components. 6) Replace the spring. 7.2.2 Reassembly of the One Way Valve 1) Slide the new O-ring over the poppet. 2) Insert the new spring into the valve body, followed by the poppet. 3) Next, install the new O-ring and new wiper on the seat. Thread the seat into the valve body. 4) Tighten the seat to 150 inch lbs. (17 Newton meters) with a torque wrench while holding the body in a soft jaw vice or wrench. 5) If the adapter has been removed, it must be cleaned and wrapped with Teflon tape. Do not allow any Teflon tape to cover the end of the adapter, or to enter the one- way valve. Loose pieces of Teflon tape can interfere with the performance of the one-way valve or the regulator and may block the diver’s air supply. This could lead to death through suffocation. WARNING 6) Test the operation of the valve. 7) Place the new O-ring on the end of the one way valve assembly and reinstall the valve assembly in the side block. Tighten to 150 inch lbs. (270 kg.cm.) with a torque wrench. Tighten to 150 inch lbs. (17 Newton Meters) with a torque wrench. © Copyright 1970-2008 Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 080508001 Kirby Morgan 37 & 57 7.3 Side Block Assembly 7.3.1 General The side block should be overhauled at least annually, or whenever components show signs of wear, damage or do not function smoothly or properly. Minimum replacement components during overhaul includes all O-rings. A repair kit is available for replacement parts (Part #525-311). The side block does not require removal from the helmet each time an overhaul is being conducted providing inspection of the internal passages does not reveal contamination or excessive corrosion. However, the side bl...