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9. Use the Sherwood in-line adjusting tool (p/n TL102) to back the adjusting orifice out of the
orifice housing until the threads disengage. Remove the in-line adjusting tool, and push the
adjusting orifice the rest of the way out of the orifice housing with the Sherwood Plastic Probe
(p/n TL111).
10. Remove the O-ring from the adjustable orifice.
11. Before removing the exhaust valve from the case, bend it over as far as it will go from the
top, bottom, left, and right sides. If it fails to snap back quickly, and does not lie perfectly flat
against the case, the valve should be replaced. If it does snap back satisfactorily, remove it and
inspect the sealing edges. If they appear smooth, and the locking tab on the nipple is good, the
valve can be reused.
12. Remove the lever support from the inside of the case . Note: The Blizzard and Oasis
style lever support can be removed with the heat transfer fins still attached. These fins
do not usually have to be removed from the lever support during servicing.
13. Normally, you will simply need to change the poppet stem seat insert to restore the second
stage to maximum performance. To change the stem seat insert , leave the lever assembly
together. With a pick or similar object, carefully remove the old seat insert. Put the new seat
insert on a clean flat surface and lower the poppet cavity (from which the old seat insert
was removed) over the new seat insert. The new style black molded seat (p/n 978-9BN)
should be installed with the identifying Sherwood symbol facing outward.
14. If parts of the lever assembly (stem, spring, lever, etc.) need to be replaced, it can be done with
a minimum number of tools. With the original poppet seat in place, and the orifice
installed in the orifice housing , screw the orifice housing and lever support together
(without the case) until the lever begins to droop. Use a #10 Torx screwdriver to remove the
screw . Unscrew the orifice housing and lever support, and the poppet and spring will be
exposed for replacement. Reverse the procedure to install the new parts. Remember to use the
old seat to perform this procedure since the seat is likely to be damaged due to excess
friction. Install a new seat when you have reassembled the lever assembly.
15. Rinse all plastic and silicone parts in clean fresh water, and then blow the parts dry with
compressed air to remove any sand and dust particles.
16.
If necessary, clean all metal parts of the second stage in an ultrasonic cleaner or cleaning
solution. Remove the O-rings before cleaning any metal parts; most cleaning solutions are
damaging to the O-ring material. See Section 6.3 in this manual for recommendations on
cleaning solutions.
17. Inspect the case for any cracks. Look particularly closely at the area where the orifice
housing and the lever support clamp down. Replace the case if any cracks are found.
18. Inspect the orifice sealing cone (where the poppet insert seals) for any nicks, scratches, or
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NOTE
: If only the lever is to be replaced, do not totally remove the screw. You can remove the lever
from under the screw when the screw is almost all the way out.
NOTE
: If you use an ultrasonic cleaner to clean the second stage adjustable orifice , use a plastic
container to prevent the orifice from vibrating against other metal parts which could damage the orifice seal.
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