Document Text Contents
Page 2
Contents
Introduction .......................................................................................... 1
Warnings, Cautions, & Notes .............................................................. 1
Scheduled Service .............................................................................. 1
General Guidelines ............................................................................. 1
Initial Inspection Procedure ................................................................ 2
Disassembly ........................................................................................ 3
Reassembly ........................................................................................ 7
Final Testing ........................................................................................ 11
Table 1 - Troubleshooting Guide ......................................................... 12
Table 2 - Recommended Tool List ...................................................... 13
Table 3 - Standard Parts Replacement Schedule ............................. 13
Table 4 - Torque Specifications ........................................................... 14
Table 5 - Test Bench Specifications.................................................... 14
Procedure A - Cleaning & Lubrication ................................................ 15
Table A - Recommended Lubricants & Cleaners .............................. 16
Exploded Parts Diagram ..................................................................... 17
Page 10
CAUTION.eps
8 Legend & Titan LX Second Stage Service & Repair Manual
© 2002 Aqua Lung America, Inc.
7. Install new, lubricated o-ring (29) onto the adjustment screw (30). Add a small amount of lubrication to
the threads of the adjustment screw.
CAUTION: If the adjustment screw is plastic, press forward while turning clockwise to prevent thread
damage.
8. If the adjustment screw is plastic, load onto a 5mm allen key; if the screw is metal, load on to a 4mm
allen key. Install the screw into the valve body. There should now be spring tension on the lever. Con-
tinue to screw clockwise until the holes for the locking pin are clear (see figure 13a). Install the locking
pin (22). Be sure that it sits evenly in the hole (see figure 13b). Back the adjusting screw out counter-
clockwise to apply tension on the pin and keep it from falling out.
Figure. 13a Screw in adjustment screw until
pin hole is clear
Figure 13b. Insert pin so both ends stick out
an equal amount
CAUTION: Do not cycle the lever, i.e., depressing the lever and letting it spring back into place.
Repeated cycling of the lever may cause the lever "feet" to migrate out and disengage from the shuttle
valve. Once the valve body is in place later in the repair procdure, it will be okay to repeatedly depress
the lever.
Figure 14. While depressing the demand
lever, install the venturi lever
Pin hole should be clear
Keep lever
depressed
11. While depressing the lever, insert the valve body into the box bottom (see figure 15). Be sure that the two
index flats and the two lever feet engage the tabs molded into the box bottom (see figure 16).
Keep lever
depressed
Figure 15. Install valve
body assembly into box
bottom
Figure 16. Index
flats and lever feet
must be between to
molded tabs
9. Fit a new, lubricated o-ring (20) into the groove located next
to the locking pin on the valve body.
10. Fit a new, lubricated o-ring (16) onto the venturi lever (17).
Before installing the venturi lever, orient the open side of the
venturi lever so it is facing the same direction as the demand
lever. While depressing the demand lever all the way, slide
the venturi lever over the valve module from left to right until
it is in position (see figure 14). After venturi lever passes over
the demand lever, DO NOT allow the demand lever to snap
back. Instead, guide it up slowly.
Page 11
Legend & Titan LX Stage Service & Repair Manual 9
© 2002 Aqua Lung America, Inc.
12. Slide a new, lubricated o-ring (15) down the threaded end of the valve body, into the box bottom. Slide
the heat exchanger (14), large diameter first, down the valve body. Thread on the retaining nut (13) until
finger tight. Using an 11/16" crows foot or deep socket, apply a torque to the nut of 45 +/-2 inch-lbs.
13. Turn in the adjustment screw (30) a half turn for the standard Titan LX and Legend, or one full turn for
the Titan LX Supreme, Legend Supreme and Octopus LX.
14. Fit a new, lubricated o-ring (18) onto the adjustable crown (19). Press the adjustable crown, threaded end
first, into the valve body. Insert a 5mm hex key or medium blade screwdriver (depending on the style of
adjustable crown) into the adjustable crown. Push the adjustable crown into the valve body as far as it
will go.
15. While holding the rim of the box bottom at eye level, turn the adjustable crown orifice in (clockwise)
until the lever just begins to drop. At this point the crown orifice has made contact with the rubber seat-
ing. This is a preliminary setting.
16. Add a new o-ring (32) to the male end of the medium pressure hose. Install a new, lubricated o-ring (36)
to the female end of the hose.
CAUTION: Prior to adjusting the lever height, the accompanying first stage must be correctly ser-
viced, adjusted to a stable intermediate pressure of 135±5 psi, and fully tested.
17. Adjust the lever height
a. Attach the Aqua Lung in-line tool (p/n 100190) to the second stage. It can accommodate both the
crown orifice with the 5mm hex and the crown orifice with the slot. The tool is shown in
figure 17 with the optional in-line medium pressure gauge (p/n111605).
b. Attach the swivel end of the medium pressure hose to the other end of the inline tool. Attach the
male end of the hose to a properly adjusted first-stage regulator (135±5). Attach the first-stage to a
fully charged cylinder. Slowly open the cylinder valve to pressurize the regulator.
c. Press inward on the adjustment wheel of the inline tool. Slowly rotate the adjustment wheel until
the inline tool engages the crown orifice. Turn the crown in until the lever drops approximately
1/4". This will “coin” the rubber seat to help achieve a better seal. Now back the crown orifice
out (counterclockwise). The lever will raise. Continue until the lever is even with the rim of the
box bottom.
18. Position the diaphragm (5) into the box bottom. Remember, the center plate of the diaphragm must have
either four molded ribs or a notch cut into it (refer to figures 3a & 3b on page 4). Using the small wooden
dowel, work the edges of the diaphragm into place. Place the thin, white thrust washer (4) on top of the
diaphragm. Make sure it is seated flat all the way around.
Figure 17. Using the
inline adjustment tool
to adjust lever height.
Optional IP Gauge
Adjustment wheel
Lever even
with rim
Page 19
Titan LX 2nd stage.eps
Page 20
A/L Logo (b/w)
Contents
Introduction .......................................................................................... 1
Warnings, Cautions, & Notes .............................................................. 1
Scheduled Service .............................................................................. 1
General Guidelines ............................................................................. 1
Initial Inspection Procedure ................................................................ 2
Disassembly ........................................................................................ 3
Reassembly ........................................................................................ 7
Final Testing ........................................................................................ 11
Table 1 - Troubleshooting Guide ......................................................... 12
Table 2 - Recommended Tool List ...................................................... 13
Table 3 - Standard Parts Replacement Schedule ............................. 13
Table 4 - Torque Specifications ........................................................... 14
Table 5 - Test Bench Specifications.................................................... 14
Procedure A - Cleaning & Lubrication ................................................ 15
Table A - Recommended Lubricants & Cleaners .............................. 16
Exploded Parts Diagram ..................................................................... 17
Page 10
CAUTION.eps
8 Legend & Titan LX Second Stage Service & Repair Manual
© 2002 Aqua Lung America, Inc.
7. Install new, lubricated o-ring (29) onto the adjustment screw (30). Add a small amount of lubrication to
the threads of the adjustment screw.
CAUTION: If the adjustment screw is plastic, press forward while turning clockwise to prevent thread
damage.
8. If the adjustment screw is plastic, load onto a 5mm allen key; if the screw is metal, load on to a 4mm
allen key. Install the screw into the valve body. There should now be spring tension on the lever. Con-
tinue to screw clockwise until the holes for the locking pin are clear (see figure 13a). Install the locking
pin (22). Be sure that it sits evenly in the hole (see figure 13b). Back the adjusting screw out counter-
clockwise to apply tension on the pin and keep it from falling out.
Figure. 13a Screw in adjustment screw until
pin hole is clear
Figure 13b. Insert pin so both ends stick out
an equal amount
CAUTION: Do not cycle the lever, i.e., depressing the lever and letting it spring back into place.
Repeated cycling of the lever may cause the lever "feet" to migrate out and disengage from the shuttle
valve. Once the valve body is in place later in the repair procdure, it will be okay to repeatedly depress
the lever.
Figure 14. While depressing the demand
lever, install the venturi lever
Pin hole should be clear
Keep lever
depressed
11. While depressing the lever, insert the valve body into the box bottom (see figure 15). Be sure that the two
index flats and the two lever feet engage the tabs molded into the box bottom (see figure 16).
Keep lever
depressed
Figure 15. Install valve
body assembly into box
bottom
Figure 16. Index
flats and lever feet
must be between to
molded tabs
9. Fit a new, lubricated o-ring (20) into the groove located next
to the locking pin on the valve body.
10. Fit a new, lubricated o-ring (16) onto the venturi lever (17).
Before installing the venturi lever, orient the open side of the
venturi lever so it is facing the same direction as the demand
lever. While depressing the demand lever all the way, slide
the venturi lever over the valve module from left to right until
it is in position (see figure 14). After venturi lever passes over
the demand lever, DO NOT allow the demand lever to snap
back. Instead, guide it up slowly.
Page 11
Legend & Titan LX Stage Service & Repair Manual 9
© 2002 Aqua Lung America, Inc.
12. Slide a new, lubricated o-ring (15) down the threaded end of the valve body, into the box bottom. Slide
the heat exchanger (14), large diameter first, down the valve body. Thread on the retaining nut (13) until
finger tight. Using an 11/16" crows foot or deep socket, apply a torque to the nut of 45 +/-2 inch-lbs.
13. Turn in the adjustment screw (30) a half turn for the standard Titan LX and Legend, or one full turn for
the Titan LX Supreme, Legend Supreme and Octopus LX.
14. Fit a new, lubricated o-ring (18) onto the adjustable crown (19). Press the adjustable crown, threaded end
first, into the valve body. Insert a 5mm hex key or medium blade screwdriver (depending on the style of
adjustable crown) into the adjustable crown. Push the adjustable crown into the valve body as far as it
will go.
15. While holding the rim of the box bottom at eye level, turn the adjustable crown orifice in (clockwise)
until the lever just begins to drop. At this point the crown orifice has made contact with the rubber seat-
ing. This is a preliminary setting.
16. Add a new o-ring (32) to the male end of the medium pressure hose. Install a new, lubricated o-ring (36)
to the female end of the hose.
CAUTION: Prior to adjusting the lever height, the accompanying first stage must be correctly ser-
viced, adjusted to a stable intermediate pressure of 135±5 psi, and fully tested.
17. Adjust the lever height
a. Attach the Aqua Lung in-line tool (p/n 100190) to the second stage. It can accommodate both the
crown orifice with the 5mm hex and the crown orifice with the slot. The tool is shown in
figure 17 with the optional in-line medium pressure gauge (p/n111605).
b. Attach the swivel end of the medium pressure hose to the other end of the inline tool. Attach the
male end of the hose to a properly adjusted first-stage regulator (135±5). Attach the first-stage to a
fully charged cylinder. Slowly open the cylinder valve to pressurize the regulator.
c. Press inward on the adjustment wheel of the inline tool. Slowly rotate the adjustment wheel until
the inline tool engages the crown orifice. Turn the crown in until the lever drops approximately
1/4". This will “coin” the rubber seat to help achieve a better seal. Now back the crown orifice
out (counterclockwise). The lever will raise. Continue until the lever is even with the rim of the
box bottom.
18. Position the diaphragm (5) into the box bottom. Remember, the center plate of the diaphragm must have
either four molded ribs or a notch cut into it (refer to figures 3a & 3b on page 4). Using the small wooden
dowel, work the edges of the diaphragm into place. Place the thin, white thrust washer (4) on top of the
diaphragm. Make sure it is seated flat all the way around.
Figure 17. Using the
inline adjustment tool
to adjust lever height.
Optional IP Gauge
Adjustment wheel
Lever even
with rim
Page 19
Titan LX 2nd stage.eps
Page 20
A/L Logo (b/w)
