1. First Stage

2. Please Turn Off The Cell Phones

3. Copyright Notice This program is copyrighted, all rights reserved. It may not in whole or in part, be copied, photocopied, reproduced translated, or reduced to any electronic medium or machine readable form without prior consent in writing from Aqua Lung International. It may not be distributed through the internet or computer bulletin board systems without prior consent in writing from Aqua Lung International ©2007 Aqua Lung International, Inc Kronos 1st Stage Service Program

4. 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

5. Product Features Go directly to disassembly

6. Features Brand new design, decreased size & weight ACD (Auto-Closure Device) Environmental dry seal on Supreme model Balanced diaphragm design on Standard model Overbalanced diaphragm design on Supreme model recommend using pneumatically balanced octopus

7. Features Two high pressure ports, four medium pressure ports Turbo assist on all MP ports Compatible to EAN 40, new out of box 232 bar yoke, 300 bar DIN

8. Features (Size & Weight)

9. Features (ACD) Auto Closure Device –Automatically closes the first stage when the regulator is removed from the cylinder valve –Keeps water and contaminants out during rinsing and storage –Allows first stage to maintain peak performance over time –Internal lubrication is preserved –Makes 1st stage safer for nitrox use –Keeps water out of accessories Computers Transmitters Inflators ACD does not restrict flow or degrade performance in any way. It only preserves it!

10. Features (ACD) How It Works –A. Closed Spring pressure forces the inlet crown upwards against the head of the center valve post –B. Open When clamped to valve, inlet crown retracts exposing the gas inlet B.A.

11. Features (Environmental Dry Seal) Supreme models come with dry seal –Allows 1st stage to be used in cold waters <50f (10c) –Insulates main spring with air –Prevents ice formation on the spring coils –Side benefit – keeps contaminants & corrosion out

12. Features (Overbalancing) The addition of the dry seal on Kronos Supreme changes the design of the 1 st stage from balanced to overbalanced –Always use a pneumatically balanced octopus with the Kronos Supreme

13. Features (Extra HP Port) The Kronos has two HP ports and four MP ports –This allows use of backup SPG or different positioning of console –All MP ports are 3/8”

14. Features (Turbo Assist)

15. Features (Nitrox Compatible) 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

16. Features (Nitrox Compatible) 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

17. Features (Nitrox Compatible) 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

18. Features (Nitrox Compatible) 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

19. Features (Yoke & DIN Available) 3365 psi yoke (232 Bar) 4351 psi DIN (300 Bar)

20. Disassembly Go to DIN

21. Remove Yoke Screw & Dust Cap

22. Remove High Pressure Plug 4mm hex key

23. Insert Vise Mount Tool Or discharged CO2 cartridge with HP adapter P/n 100395 ! CAUTION: If using a CO2 cartridge, use an HP adapter so threads don’t break off in 1 st stage port

24. Remove Yoke Retainer Attach 1st stage in vise Lift off yoke & retainer –Use large adjustable wrench

25. Remove O-ring & Filter

26. Lift Off Spacer Ring Remove first stage from vise

27. Disassemble ACD Yoke Go to DIN

28. Install Yoke Retainer In Yoke Install dust cap and yoke screw –Snug down yoke screw – This will compress the ACD spring

29. Turn Clockwise To Loosen Carefully clamp yoke retainer in vise by wrench flats –3mm hex key –Turn clockwise 3-360 degree turns to loosen valve

30. Remove Yoke From Vise Remove yoke screw & dust cap Remove ACD assembly from yoke –Separate ACD components

31. Remove O-ring From Yoke Valve

32. Push Yoke Valve Out Of Yoke Crown

33. Remove O-ring From Yoke Crown

34. Yoke ACD Components

35. Disassemble ACD DIN Return to yoke

36. Remove Dust Cap

37. Install DIN To Yoke Converter P/n 125237 –This will compress the ACD spring

38. Remove High Pressure Plug 4mm hex key

39. Insert Vise Mount Tool Or use discharged CO2 cartridge with adapter p/n 100395

40. Remove DIN Shutter Valve Secure 1 st stage into vise Remove shutter valve –Using a 4mm hex key, loosen shutter valve

41. Remove DIN To Yoke Converter Remove shutter crown & spring

42. Remove O-rings From Shutter Crown

43. Remove DIN Screw & Handwheel 7/16” or 11mm deep socket

44. Remove O-ring From DIN Screw

45. Remove Filter Holder Use large adj. wrench

46. Remove Filter & O-ring

47. DIN ACD Components

48. Remove Cover Ring Install 1 st stage body into vise –Use small blade screwdriver –Carefully remove cover ring Go to Supreme

49. Dry Seal Removal Install 1 st stage into vise Remove diaphragm retainer –Use adj. face spanner (p/n 129198)

50. Dry Seal Removal Remove cover ring Remove piston Remove secondary diaphragm

51. Remove Adjustment Screw Use 8mm hex key

52. Remove Washer & Spring

53. Remove Spring Retainer Use large adj. wrench –Or 32mm open end wrench

54. Remove Spring Pad & Diaphragm Push out Diaphragm with finger

55. Remove Pin Pad & Pin Remove 1 st stage from vise

56. Remove Balance Chamber Using a socket wrench & ½” socket, remove balance chamber

57. Remove HP Seat & Spring

58. Remove O-ring & Backup Ring

59. Remove Crown Orifice Using a 1/16” dowel, push out crown orifice

60. Critically Inspect Crown Orifice Remove o-ring Sealing area O-ring groove

61. Remove Port Plugs & O-rings

62. Technician Features No thrust washer on main diaphragm Diaphragm is installed into spring retainer instead of body New balancing chamber design allows easier removal of o-ring & backup ring Single spring on balancing chamber ACD to keep inside of regulator clean

63. This Concludes Disassembly

64. Cleaning & Lubrication Go directly to Reassembly

65. 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 hydrocarbon free gas (for EAN use)

66. 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 !

67. 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

68. 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

69. Reassembly

70. Install Crown O-ring

71. Install Crown Orifice Using seat installation tool (p/n 109437) –Carefully push the crown into the body

72. Install Backup Ring Place backup ring into balance chamber –The concave side must face up to cradle the o-ring

73. Install O-ring Install a well- lubricated o-ring into the balance chamber

74. Place HP Seat In Body

75. Install Spring & Balance Chamber

76. Tighten Balance Chamber Use a ½” socket by hand Using a socket wrench –Push down and tighten until snug –Tighten down until there is metal to metal contact

77. Install Pin & Pin Pad Turn body over

78. Cycle Pin Pad Push down on pin pad –Should feel spring loaded

79. Install Diaphragm In Retainer Make sure diaphragm is completely seated

80. Install Spring Retainer On Body Snug down retainer by hand

81. Torque Spring Retainer Install 1 st stage into vise using vise mounting tool –Torque to 18 ft/lbs ( 24.5 Nm ) –Use ft/lb torque wrench and spring retainer socket (p/n:122152) Torque: 18 ft/lbs 24.5 Nm

82. Install Spring Pad & Spring

83. Install Washer & Adj Screw

84. Preset Adjustment Screw For Kronos For Kronos Supreme –Use 8mm hex key –Tighten to flush –Use 8mm hex key –Tighten flush with inside shoulder

85. Install Spacer Ring

86. Reassemble ACD Yoke Go to DIN

87. Install O-ring In Yoke Crown

88. Install Yoke Valve In Yoke Crown

89. Install O-ring On Yoke Valve

90. Install Spring In Yoke Retainer

91. Assemble Yoke Retainer Place yoke crown onto yoke retainer Place yoke retainer into yoke

92. Compress ACD Spring Install dust cap and yoke screw –Firmly tighten down yoke screw – This will compress the ACD spring

93. Turn Counter-Clockwise To Tighten Carefully clamp yoke retainer in vise by wrench flats –Use in/lb torque wrench & 3mm hex key adapter –Torque yoke valve to 18 in/lbs (2 Nm) Torque: 18 in/lbs 2 Nm

94. Remove Retainer From Yoke

95. Measure Shoulder 1.5mm

96. Test ACD Mechanism Push down on ACD w/thumb, this should open ACD device

97. Turn Yoke Retainer Over Install o-ring Place filter into yoke retainer

98. Install Yoke & Yoke Retainer Hold spacer ring on body –Place yoke retainer into yoke –While holding body inverted, install yoke retainer into body hand tight

99. Torque Yoke Retainer Install 1 st stage into vise using vise mounting tool –Using ft/lb torque wrench & retainer socket (p/n 111001) with 3” extension –Torque to 18 ft/lbs (24.5 Nm) –Remove 1 st stage from vise Torque: 18 ft/lbs 24.5 Nm

100. Install Dust Cap & Yoke Screw

101. Reassemble ACD DIN Return to yoke

102. Install O-ring & Filter In Holder

103. Install Filter Holder In Body Hold body inverted –Install filter holder hand tight

104. Torque Filter Holder Install 1 st stage into vise –Use a ft/lb torque wrench & 24mm socket or crow-foot –Torque to 18 Ft/lbs (24.5 Nm) Torque: 18 ft/lbs 24.5 Nm

105. Install O-ring On DIN Screw

106. Install Handwheel & DIN Screw

107. Torque DIN Screw Use ft/lb torque wrench & 11mm deep socket –Torque DIN screw to 18 ft/lbs (24.5 Nm) Torque: 18 ft/lbs 24.5 Nm

108. Install O-rings In Shutter Crown Unlubricated o-ring on this side only

109. Install Shutter Crown Set shutter crown on top of spring Install spring

110. Install DIN To Yoke Converter

111. Torque Shutter Valve Use in/lb torque wrench & 4mm hex key adapter –Torque shutter valve to 18 in/lbs (2 Nm) Torque: 18 in/lbs 2 Nm

112. Remove 1 st Stage From Vise Push down on ACD device, it should open Remove DIN to yoke converter

113. Install O-rings & Port Plugs Install port plugs using 4mm hex key –Leave one MP port open for testing Install new o-rings onto plugs

114. Testing

115. Adjusting Medium Pressure (MP) Install MP gauge (p/n 111610) into 1 st stage MP port –If gauge lacks over-pressure relief valve, attach properly adjusted 2nd stage as relief valve in case of HP leak

116. Adjusting Medium Pressure (MP) Attach 1 st stage to fully charged cylinder 3000psi (206 bar)

117. WARNING If the pressure gauge rapidly exceeds 145 psi (10 bar), there is a HP leak. Quickly close the cylinder valve and purge the regulator. Failure to do so may cause a rupture to the MP hose and/or MP gauge which, in turn, can lead to personal injury !

118. Adjusting Medium Pressure (MP) With relief valve open on gauge, slowly open cyl. valve & pressurize the 1 st stage

119. Adjusting Medium Pressure (MP) Close the relief valve –If MP rapidly exceeds 145 psi (10 bar ), open relief valve & shut off cylinder valve –This means there is a HP leak

120. Adjusting Medium Pressure (MP) Using an 8 mm hex key –Turn the adj. screw in 1/8 increments clockwise to increase the MP –Turn the adj. screw counter- clockwise to decrease the MP

121. Adjusting Medium Pressure (MP) Using the relief valve on the gauge –Cycle the reg several times after each adjustment –Set the MP to: 130-145 psi (9-10 bar) MP Setting: 130-145 psi 9- 10 bar

122. Adjusting Medium Pressure (MP) Let the regulator stand for several minutes. Check that MP remains stable –If MP rises more than 5psi (0.3 bar), it indicates a leak –Close valve, purge line & pressurize again. Perform final check Click here to install dry kit

123. Dry Kit Installation Keep Kronos pressurized Install piston –Install cover ring

124. Dry Kit Installation Install secondary diaphragm into retaining ring Install retaining ring hand tight

125. Dry Kit Installation –NOTE: The MP should not change during this procedure Tighten with adj. face spanner until snug

126. Immersion Test –Observe for leaks –Troubleshoot accordingly With the Kronos still pressurized, submerge the unit in a tub of water 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.

127. This Concludes Servicing Of The Kronos First Stage Rev 07/10/07