6
XTX Second Stage Regulator Maintenance Manual
Pinch Method
Press upwards
on sides of ‘O’
Ring to create a
protrusion. Grab
‘O’ Ring or insert
‘O’ Ring tool at
protrusion.
NOTE: Ensure that the tool is rmly pressed
against the Case Cover whilst unscrewing.
Removal of hose
Removal of diaphragm
GENERAL CONVENTIONS
Unless otherwise instructed, the following terminology and
techniques are assumed:
1. When instructed to remove, unscrew, or loosen a
threaded part, turn the part anti-clockwise.
2. When instructed to install, screw in, or tighten a
threaded part, turn the part clockwise.
3. When instructed to remove an ‘O’ Ring, use the pinch
method (see gure below) if possible, or use a brass,
aluminium or plastic ‘O’ Ring removal tool. Avoid using
hardened steel picks, as they may damage ‘O’ Ring
sealing surfaces. All ‘O’ Rings that are removed are
discarded and replaced with brand new ‘O’ Rings.
4. The following acronyms are used throughout the
manual: MP is Medium Pressure; HP is High Pressure;
PN is Part Number.
5. Numbers in parentheses reference the key numbers
on the exploded parts schematics. For example, in the
statement, “...remove ‘O’ Ring (11) from...”, the number
11 is the key number to the Blanking Piece ‘O’ Ring.
DISASSEMBLY PROCEDURES
NOTE: Before performing any disassembly,
refer to the exploded parts drawing, which refer-
ences all mandatory replacement parts. These
parts should be replaced with new, and must not
be reused under any circumstances - regardless
of the age of the regulator or how much use it
has received since it was last serviced.
CAUTION: Use only a plastic, brass or
aluminium ‘O’ Ring removal tool (PN AT79)
when removing ‘O’ Rings to prevent damage
to the sealing surface. Even a small scratch
across an ‘O’ Ring sealing surface could
result in leakage. Once an ‘O’ Ring sealing
surface has been damaged, the part must
be replaced with new. DO NOT use a dental
pick, or any other steel instrument.
1. Using two 11/16” spanners, hold the Heat Exchanger
(6) stationary while turning the Hose Swivel anticlockwise.
Remove the ‘O’ Ring from inside the Hose
Swivel. Exercise caution not to scratch the ‘O’ Ring
groove. Remove the ‘O’ Ring from the male end of the
Hose.
2. Pull back the two
Hose Protectors and
inspect the Hose
Crimps. If either
Crimp is damaged or
the Hose is pulling
out of the crimp then
the Hose must be
replaced.
3. Using the Apeks XTX Tool (PN AT20F), unscrew the
Case Cover (2).
NOTE: The Front Cover (2) and Purge Button (1)
should be cleaned complete. It is not necessary to
remove the purge button when servicing.
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