MASK MOUNTED REGULATOR REPAIR
Removing the Inlet Screen, Internal Sleeve, O-Ring,
Power Stage Spool, and Power Stage Diaphragm
Do not press on the lever assembly. Do not unthread
the base and lever assembly or the divider skirt from
the valve core. This could damage the bottom lever
pad and affect operation.
1. Place a 1" wrench on the hex flats to secure base and
lever assembly.
2. Turn the sleeve
counter-clockwise to
unthread it from
base/lever.
3. Remove and discard
the internal sleeve O-
ring.
4. Inspect the inlet screen and replace it if it is damaged.
5. Remove the power
stage diaphragm and
discard it. Use the plas-
tic stick if necessary to
remove the diaphragm.
Installing the Inlet Screen, Sleeve O-Ring, Power
Stage Spool, and Power Stage Diaphragm
1. Clean any debris from inside the valve core before
reassembly.
2. Place a new diaphragm
into the valve and lever
assembly. Ensure the
flat side of the
diaphragm faces up
and that the diaphragm
rib nests into the
matching groove inside
the assembly. Use the
plastic stick if neces-
sary to be sure the
diaphragm is seated.
3. Place the power stage
spool into the valve
assembly with the ring
of holes against the
power stage
diaphragm.
4. Center the screen on the power stage spool. Ensure
the open end of the screen faces up.
5. Place a thin film of
Christo-Lube lubricant
on a new O-ring and
install it in the groove
in the sleeve.
6. Place one drop of
Loctite* #222 adhesive
on the large threads of
the sleeve.
Note:
Ensure the sleeve O-ring stays in its groove on the
end of the sleeve during reassembly.
Do not grasp the lever base during the next step. Hold
the valve body hex, not the base and lever assembly.
5
TAL 4011 (L) Rev. 3 - 817081
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