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b. If the tab has a metal grip ring holding the logo into the cover, grasp the ring with pliers so
that squeezing the pliers causes the jaws of the grip ring to open. Pull the grip ring off, and
then remove the logo by pulling it from the outside of the case.
c. If the logo has a plastic barb built into it, instead of the grip ring, then it is the newer style.
Simply pull the logo from the outside of the cover until it pops out.
d. To install the new logo with a grip ring: flatten the old grip ring with pliers until it has its original
shape. Then install the logo from the outside of the cover. Slide the straightened grip ring
down the stem of the replacement logo until it bottoms. Check the grip ring for tightness.
e. To install the new logo with a self-holding barb: push the new logo into the case from the
outside until the barb is fully engaged inside the cover.
5. Using your thumbnail or a slotted screwdriver, gently pry the diaphragm retaining ring out of
the case (see Photo #8).
6. Gently remove the diaphragm from the case.
7. Using a size "0" square drive screwdriver or a small Phillips screwdriver, loosen and remove the
screw and washer from the orifice adjusting knob .
8. Remove the adjusting knob from the end of the adjusting orifice.
9. Using a small slotted screwdriver, remove the cir-clip from the adjusting orifice.
10. Holding the base of the orifice housing with a 3/4" wrench, use a 5/8" wrench to remove the
retainer nut from the orifice housing .
11. Remove the swivel fitting from the orifice housing. Inspect the inner sealing surfaces for
scratches.
12. While holding the plastic case in your hand, use a 3/4" wrench to remove the orifice
housing from the lever support . The case is reinforced to withstand this operation.
13. Before removing the lever support and assembly from the case, look into the mouthpiece
tube from the outside. There are two plastic tabs in the mouthpiece tube against which the fins
rest. The fins should rest on the side of the tabs towards the orifice housing (on the right side
as you look into the mouthpiece tube from the outside).
Remember this placement when you
reassemble the regulator!
14. Remove the lever support and assembly from the case with the heat transfer still
attached. There is no reason to remove these fins from the lever support during a normal
service interval. If you do have to remove the fins, use a 5/32" socket wrench to remove and
replace the screws .
15. Normally, only the poppet stem seat insert will need to be changed to restore the second
stage to like-new performance. To change this stem seat insert, leave the lever assembly together.
a. Carefully remove the old seat insert from the poppet cavity using a pen knife or similar object.
b. Put the new seat insert on a clean flat surface and lower the poppet cavity over it. Install the
black molded seat (p/n 978-9BN) with the identifying Sherwood symbol facing outward.
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