Micra ADJ Second Stage Service & Repair Manual
5
© 1997 U.S. Divers Co., Inc.
Disassembly Procedures
NOTE: Before performing any disassembly, refer to the
schematic drawing, which references all mandatory replace-
ment parts. These parts should be replaced with new, and
must not be reused under any circumstances - regardless of
the age of the regulator or how much use it has received
since it was last serviced.
CAUTION: Use only a plastic or brass O-ring removal tool
(P/N 9440-22) when removing O-rings to prevent damage to
the sealing surface. 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 re-
placed with new. DO NOT use a dental pick, or any other
steel instrument.
1.
Slide back the hose protector(10) to expose the connection of
the LP hose at the second stage.
2.
While holding the hex nut(13) of the second stage secure with
a
w
" open-end wrench, apply a
n
" open-end wrench to the
female fitting of the LP hose(8). Turn the fitting counter-
clockwise to loosen and remove the hose from the second
stage. Remove the O-rings(7&9) from the hose and discard.
Set the hose aside.
3.
Carefully snip the plastic mouthpiece clamp(18) and remove
the mouthpiece(17) from the box bottom. Inspect the mouth-
piece to ensure it is free of any tears or cuts that may cause
leakage of water into the second stage or other discomfort.
Discard the mouthpiece or set it aside to be reused, depending
on its condition.
4.
Turn the color ring(1) counter-clockwise by hand to loosen
and remove from the second stage box bottom(14).
5.
Place the Circlip/ Retaining Ring Tool (P/N 1078-46) directly
over the purge cover with the two pins facing down on each
side. Firmly press straight down on the tool to depress the
purge cover so that the pins are securely engaged into two
opposite slots of the retaining ring(2). (See Fig. 1.) While
holding the tool securely engaged, turn the retaining ring
counter-clockwise to loosen and remove.
6.
Lift out the purge cover(3) and demand diaphragm(4). In-
spect each of these items closely to ensure that they are
perfectly round and free of any tears, deterioration, or other
damage. If damage or deterioration is found, discard the
item(s) and do not reuse.
7.
Turn the adjustment knob(32) slightly in either direction until
the retaining pin(33) can be seen facing up inside the through-
hole. While holding the second stage securely in place, apply
a
z
" drift pin punch to the end of the retaining pin, and tap
the punch lightly with a small mallet to drive the pin out
through the opposite side of the knob. When at least half of
Fig. 1 - Retaining Ring Removal
