Presentation on theme: "Second Stage. Please Turn Off The Cell Phones Copyright Notice This program is copyrighted, all rights reserved. It may not in whole or in part, be copied,"— Presentation transcript:
O-ring Removal (Pinch Method) Pinch Method: Using fingers, push on opposite sides to create protrusion Use only brass or plastic pics to remove o-rings, this will protect delicate seating surfaces Never reuse o-rings P/n 944022
Features (Coldwater) The Kronos 2 nd stage is EN 250 approved for cold water use when used with the Kronos Supreme model 1 st stage Due to the Side-X exhaust, exhaled gases warm the mechanism as it goes through the baffle
Features (Nitrox) The Kronos is nitrox (EAN) compatible to 40% out of the box Built with a high level of cleanliness EAN compatible components and lubricants Have passed required adiabatic compression testing to ensure their safety and compatibility
Features (Nitrox) Responsibility of the owner to maintain the cleanliness of the regulator If regulator will be used interchangeably with breathing air, the air should be oxygen-compatible or “hyper- filtered” whereas the condensed hydrocarbons do not exceed 0.1 mg/m3 Grade E air does not necessarily meet this criterion Hydrocarbons found in Grade E air can pose a risk in the presence of elevated oxygen content
Features (Nitrox) Hydrocarbons build up over time along the passageways of the equipment When hydrocarbons come in contact with high-pressure oxygen enriched air, they can pose a very real hazard that can lead to combustion If a regulator has had use with Grade E breathing air, it should receive a standard overhaul, including ultrasonic cleaning with a detergent solution, that removes hydrocarbons, prior to being put back into nitrox service
Features (Nitrox) Although second stage components are not exposed to high pressure EAN, Aqualung recommends that the same cleaning procedures be followed for the complete regulator This prevents the possibility of cross contamination and guarantees the cleanliness of the entire regulator
Technician Features No o-ring on valve body New counter-balance chamber New diaphragm and lever Reverse thread on cam –Wrench flats on cam that engage with venturi. This allows venturi adjustment to increase or decrease spring tension (DUAL CAM) Red clip holding venturi in place Side-X exhaust cannot be completely removed without first removing mp hose
Cleaning & Lubrication Go directly to Reassembly
Cleaning Procedures Brass and Stainless Steel Parts –Pre-clean in warm soapy water; nylon bristle brush –Ultrasonically clean with soapy water; vinegar OK on tough corrosion –Rinse in fresh water; use distilled water if tap water is “hard” –Blow dry with lp hydrocarbon free gas (for EAN use)
Cleaning Procedures Aluminum, Plastic & Rubber Parts –Soak in warm, soapy water –Use soft nylon bristle brush to remove deposits –Rinse with fresh water –Blow dry with LP hydrocarbon free gas (for EAN use) CAUTION: DO NOT soak plastic parts in acidic solutions !
Cleaning Procedures Regulator Hose –Hose fittings - Ultrasonically clean with soapy water; vinegar OK on tough corrosion –Can run soapy water through hose if needed –Thoroughly rinse with fresh water –Blow out hose before installing
Lubrication Procedures Lubrication –Christo-lube MCG 111 –Light film only –Remove visible excess –If regulator will be used with EAN, you should wear powderless, latex gloves (or equivalent) when lubricating and handling o-rings
Adjust Lever Height –Attach to a properly adjusted 1 st stage or test bench, slowly Pressurize to 3000 psi Attach inline adj tool (p/n 100190) to 2 nd stage
Adjust Lever Height (max) Use the crown/lever tool –Place the tool onto the case in the max position, (larger raised part facing down) –Slide tool across lever –2 nd stage should leak air with this test –If 2 nd stage does not leak, lever is to low –Raise lever height by backing out crown slightly and recheck
Adjust Lever Height (min) Use the crown/lever tool –Turn the tool over & place onto the case slide tool across lever –2 nd stage should not leak air with this test –If 2 nd stage does leak, lever is to high –Lower lever height by turning in crown slightly and recheck
Set Adjustment Screw While still under pressure, loosen adj screw until small leak is heard –Turn adj screw back in 1.5 turns –Depressurize & remove inline tool CAUTION: If no leak is heard, cam was not installed correctly !
Final Testing Check for leaks –Immerse second stage U/W – Look for streaming bubbles; don’t mistake trapped air for leaks –Note leak source; refer to troubleshooting table in service manual NOTE: Do not confuse bubbles from trapped air with a true leak. If there is an air leak, bubbles will come out in a constant stream.
This Concludes Servicing Of The Kronos 2 nd Stage Rev 07/10/07