8
TX Second Stage Regulator Maintenance Manual
9
TX Second Stage Regulator Maintenance Manual
13. Using a Slotted Seat Adjuster (PN AT51), turn the Seat (17)
six to seven full turns anti-clockwise. Since the Seat is ‘O’
ring sealed, it will not completely unscrew from the Valve
Spindle. Insert a pair of external circlip pliers into the Valve
Spindle, and pull the Seat completely out. Remove the ‘O’
ring (18) from the Seat.
This Ends Disassembly
Before starting reassembly, perform parts cleaning
and lubrication according to the procedures
outlined in ‘Cleaning & Lubrication’ on page 15.
NOTE: If the Exhaust Valve (15) is to be removed, pinch
edge of Exhaust Valve and pull tail through hole in Case
(9).
Inspection and Removal of Exhaust Valve
Removal of mouthpiece
14. To remove the Exhaust Tee (16), squeeze the two exhaust
ports (see picture) together. Pull the Tee away from the Case
(9).
15. Fold back the edges of the Exhaust Valve (15) and inspect
underneath. The seating surface should be clean and free of
damage. Inspect the Exhaust Valve. It should be supple and
have well dened edges. If it looks good, there is no need
to remove it and it may be reused. If there is any sign of
deterioration, it should be replaced.
16. Using side cutters, snip the Mouthpiece Clip (11). Remove
the mouthpiece (12).
12. Using a ngernail, remove the Rubber Seating (22) and
small ‘O’ ring (24) from the Shuttle Valve.
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