5
DISASSEMBLY PROCEDURE
First Stage Disassembly
3.
Using a 3/16" hex bit socket and flex wrench, unscrew the swivel
port plug (41) from the LP body (8). Separate the spacer (37) and
MP hose (38) from the swivel port plug. Remove o-rings (39 & 40)
from the swivel port plug, using the brass o-ring tool as needed.
CAUTION:
Use only brass o-ring removal tools when
removing o-rings to prevent damaging critical sealing
surfaces. 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, except where instructed.
NOTE: Before performing any disassembly, refer to the
exploded parts drawing, which references all mandatory
replacement parts. These parts should be replaced with
new service kit parts. Old parts should not be reused under
any circumstances, regardless of the regulator age or how
much use it has received since it was last serviced.
5.
Unscrew the handwheel retainer (29) using the notched
end of the 5 in 1 tool. Remove the handwheel washer (28),
spring (27), handwheel (26), nylon washer (25) from the stem
(17). Remove the indicator ring (24) from the bonnet (23).
4.
Unscrew the safety plug
assembly (35) from the HP
module body (13) using a
3/8” socket and flex wrench.
6.
Using the 3/4" wrench on the 5 in 1 tool, unscrew the bonnet (23)
from the HP module body (13). Pull the stem (17) out of the bonnet.
7.
Remove the o-ring (19) from the bonnet (23). Remove the
back-up ring (22), o-ring (21), brass stem washer (20) and
Teflon washer (18) from the stem (17)
.
NOTE: It is possible that some or all of the stem assembly
parts may have remained inside the bonnet during removal.
1.
Open the handwheel (26)
and depressurize the system.
Ensure the cylinder (42 or 43)
is completely empty and it
contains no air.
Hose Teeth
2.
Pinch the locking slide ring (58) on opposing grips and loosen
the hose (38) from the second stage. Carefully remove the o-ring
(21) from inside the hose swivel using o-ring tool (PN 10-102-
400). Exercise caution not to scratch the o-ring groove. Check
the teeth on the second stage end of the MP hose (38), they
should be relatively sharp and not excessively worn. Ensure the
internal threads are in good condition and the nut spins freely.
