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Dive Rite XT2 Service Manual
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Dive Rite XT2 Service Manual

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XT2 Second Stage
Service Manual
Copyright 2018 Lamartek Inc. dba Dive Rite
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Summary of Contents for Dive Rite XT2

  • Page 1 XT2 Second Stage Service Manual Copyright 2018 Lamartek Inc. dba Dive Rite...
  • Page 2 Possession of this guide does not qualify any individual in the service of Dive Rite Breathing Systems. Only qualified Dive Rite dealers can service Dive Rite Products. Improper servicing can lead to serious injury or death. • Only Original Parts ordered from Dive Rite...
  • Page 3 Table of Contents • Pages 4 Required Tools • Pages 5 Schematics • Pages 6-15 Disassembling the Second Stage • Pages 16-27Assembling the Second Stage • Pages 28-36 Reversing the Hose Routing • Pages 37-40 Tuning and Adjusting Dive Rite Regulators...

  • Page 4: Required Tools

    Required Tools • 11/16 wrench • 11/16 tappet wrench • Flat-blade screwdriver • ¼” wood or plastic dowel...
  • Page 5 6 RG5206 XT2 - SS - DIAPHRAGM 7 RG5207-M XT2 - SS - DIAPHRAGM WASHER 8 RG5208 XT2 - SS - COVER - BLACK 9 RG5209 XT2 - SS - BUTTON SPRING 10 RG5210 XT2 - SS - PURGE BUTTON...
  • Page 6 Disassembling the XT2 Second Stage *You must use two wenches to remove or install a hose onto the XT2 second stage. Damage to internal components may result from improper hose removal or installation. 1) An 11/16 tappet wrench is used to hold the...
  • Page 7 2) Remove the Cover (8), Diaphragm Washer (7), and Diaphragm (6) 3) Use an 11/16 wrench to loosen and remove the Nut (27)
  • Page 8 4) Depress the Lever Arm (21) and pull on the Adjustment Knob (11) to remove the adjustment tube assembly 5) Remove the Bushing (26), Body Insert (28), and O-rings (18, 25) *Note the orientation of the Body Insert before removal...
  • Page 9 6) Remove the Deflector Knob (24). *Hold down the Lever (21) and slide the Deflector Knob over the Lever until it stops. Rotate the Deflector Knob 180 degrees and slide it off the rest of the way. 7) Remove the O-ring (25) from the Deflector Knob (24)
  • Page 10 8) Remove the Adjustment Knob Pin (20) *If the Pin is tight rotate the Adjustment Knob (11) so that it is in the middle of its adjustment range. The pin cannot be removed if the adjustment knob is turned all the way in either direction.
  • Page 11 10) Remove the O-rings (18, 12)
  • Page 12 11) Remove the LP Seat (17) and the two O-rings (15)
  • Page 13 12) Use a flat-blade screwdriver to loosen the Orifice (23) and then push it out with a wooden dowel 13) Remove the O-ring (22)
  • Page 14 14) Use a heat gun to heat the Exhaust Cover (5). This will soften the material allowing it to be easily removed 15) Remove and inspect the Exhaust Valve (4) for damage. *This part will be reused as long as it is not damaged.
  • Page 15 This completes disassembly of the XT2 Second Stage Warning!!! Only original Dive Rite parts are to be used • Parts should be cleaned in a solution compatible with Oxygen use. • All points of lubrication (O-rings, Etc.) require the use of an Oxygen compatible lubricant. I.E.
  • Page 16 Assembling the XT2 Second Stage 1) Install the Exhaust Valve (4) 2) Use a heat gun to heat the Exhaust Cover (5). This will soften the material allowing it to be easily installed...
  • Page 17 3) Install O-ring (22) onto the Orifice (23) 4) Install Orifice (23) into the Adjustment tube and tighten with a flat-blade screwdriver *The Orifice should be screwed in until it stops then unscrewed 1.5 turns...
  • Page 18 5) Install the LP Seat (17) and O-rings (15) onto the Piston (16) *Apply a small amount of grease to the LP Seat stem to allow it to install fully.
  • Page 19 6) Install the O-ring (12) onto the Adjustment Knob (11) 7) Install O-ring (18) onto Adjustment Tube (19)
  • Page 20 8) Install Piston (16) into the Adjustment Tube (19) *The lever catch on the Piston must be properly aligned with the Lever...
  • Page 21 9) Install the Spring (14) and Balance Cylinder (13) *Apply pressure to the back of the Balance Cylinder to ensure that the Piston is seated properly on the Lever 10) Install the Adjustment Knob (11) onto the Adjustment Tube (19) *The Lever should be under spring tension...
  • Page 22 11) Turn the Adjustment Knob (11) so that the it does not block the pin hole and install the Adjustment Knob Pin (20)
  • Page 23 12) Install the O-ring (25) onto the Deflector Knob (24) 13) Install the Deflector Knob (24) *Slide the knob over the Lever (21) until it stops. Rotate the knob 180 degrees and slide it on the rest of the way so that it covers the Adjustment Knob Pin (20)
  • Page 24 14) Install the Body Insert (28) *The insert must be oriented properly and be fully seated...
  • Page 25 15) Install the adjustment tube assembly *Ensure that the Lever (21) is recessed properly into the Body Insert (28)
  • Page 26 16) Install O-rings (18, 25) 17) Install Bushing (26) 18) Install Nut (27) and tighten to 1-2 ft-lb...
  • Page 27 19) Apply silicone grease to the friction surface of the Diaphragm Washer (7) 20) Install the Diaphragm (6) and Diaphragm Washer (7)
  • Page 28 21) Install the Cover and LP hose *You must use two wenches to remove or install a hose onto the XT2 second stage. Damage to internal components may result from improper hose removal or installation This completes Assembly of the XT2 Second Stage...
  • Page 29 Possession of this guide does not qualify any individual in the service of Dive Rite Breathing Systems. Only qualified Dive Rite dealers can service Dive Rite Products. Improper servicing can lead to serious injury or death. • Only Original Parts ordered from Dive Rite...
  • Page 30 *You must use two wenches to remove or install a hose onto the XT2 second stage. Damage to internal components may result from improper hose removal or installation. 1) An 11/16 tappet wrench is used to hold the Nut (27) in place while another 11/16 wrench...
  • Page 31 2) Remove the Cover (8), Diaphragm Washer (7), and Diaphragm (6) 3) Use an 11/16 wrench to loosen and remove the Nut (27)
  • Page 32 4) Depress the Lever Arm (21) and pull on the Adjustment Knob (11) to remove the remove the adjustment tube assembly 5) Remove the Bushing (26), Body Insert (28), and O-rings (18, 25) *Note the orientation of the Body Insert before removal...
  • Page 33 6) Remove the Lever (21) and Deflector Knob (24) 7) Identify the correct Deflector Right Knob (24) for the desired hose routing *The deflectors can be identified by the location of the small additional Left...
  • Page 34 8) Install the Deflector Knob (24) and Lever (21) for the desired hose routing 9) Install the Body Insert (28) on the proper side for the desired hose routing...
  • Page 35 10) Install the adjustment tube assembly *Ensure that the Lever (21) is recessed properly into the Body Insert (28)
  • Page 36 11) Install O-rings (18, 25) 12) Install Bushing (26) 13) Install Nut (27) and tighten to 1-2 ft-lb...
  • Page 37 14) Install the Diaphragm (6) and Diaphragm Washer (7) 15) Install the Cover and LP hose *You must use two wenches to remove or install a hose onto the XT2 second stage. Damage to internal components may result from improper hose removal or installation...
  • Page 38 Tuning and Adjusting Dive Rite Regulators...
  • Page 39 1) Attach a second stage adjusting tool between the second stage and the low pressure hose. The first stage can also be connected to a overpressure valve 2) Close all other open ports with the appropriate plugs.
  • Page 40 3) Connect to a high pressure (3000 psi) gas source. 4) Open the supply pressure slowly. 5) Adjust the intermediate pressure by moving the adjusting screw to increase or decrease tension on the intermediate pressure spring. (Purge the second stage after each adjustment.) 6) The Intermediate pressure should be adjusted to 140 psi +/- 5psi.
  • Page 41 Tuning the Second Stages 1) Turn the adjustment knob counterclockwise until it stops; this will set the second stage for the least resistance. 2) Using the second stage adjusting tool set the resistance to .8-1.0 inches of water. 3) Purge the regulator and observe the intermediate pressure. An intermediate pressure drop of 2-8 psi is considered acceptable Note: By setting the adjustment knob to the easiest setting, the diver can increase breathing resistance to his/her preference.