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cYLINDER VALVE mAINtENANcE
PRocEDuRES
note: Before performing any disassembly, refer to the
exploded parts drawing, which references all manda-
tory replacement parts. these parts should be replaced
with new and must not be reused under any circum-
stances - regardless of the age of the valve or how
much use it has received since it was last serviced.
cAutIoN: use only a plastic (pn 103102) or brass
(pn 944022) o-ring removal tool when removing o-
rings to prevent damage to the sealing surface.
Even a small scratch across an o-ring sealing sur-
face could result in leakage. once an o-ring seal-
ing surface has been damaged, the part must be
replaced with new. Do Not use a dental pick or
any other steel instrument.
Valve Disassembly
1. Open cylinder valve counterclockwise and ensure cylinder (57)
is fully depressurized. Secure cylinder in cylinder vise (pn 100397)
and remove the cylinder valve from the cylinder by turning valve
body (55) counterclockwise with a 27mm (1-1/16 inch) crowfoot (pn
FC34A) and 3/8" flex handle drive (pn 9-44363). When done, re-
move cylinder from cylinder vise.
2. Remove the o-ring (56) from the valve body (55). Use the ap-
propriate o-ring tool (pn 944022). Discard o-ring.
3. Using the modified screwdriver (pn 941586), remove the hand-
wheel nut (42), spring (43), handwheel (44) and washer (45) from
the spindle (50).
4. Remove the handwheel (44) and washer (45) from the spindle (50).
5. Unscrew the valve seat adapter (53) from the body (55) using
a 3/8" flex handle drive (pn 9-44363) and 5mm hex key adapter
(pn 8367A23).
cAutIoN: Loctite 242 is used to hold this part in place
in addition to the torque applied during assembly.
note: If the valve seat adapter does not loosen, use
a heat gun to heat up the body and adapter to loosen
the adhesive.
cAutIoN: Do not damage the internal surface of
the valve seat adapter.
6. Remove the o-ring (54) from the valve seat adapter (53) and
discard it.
31
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