
NM2B
REPLACEMENT PROCEDURES (continued)
4.33
PEEP Valve Magnet Assembly Replacement
The PEEP valve magnet assembly removal and replacement is outlined in the
following procedure. Figure 4-33 shows the knob and magnet assembly details.
NOTE:
Some older PEEP valve assemblies require the use of a tamper-proof
5/56 hex key (P/N S010056).
4.33.1
Loosen the two set screws on the block, at each side of the PEEP
knob using a 5/64 hex key. Back these screws out until they are flush
with the block to allow proper removal of the knob assembly.
4.33.2
Using a flat head screw driver, carefully pry the knob and magnet
assembly away from the block, and remove the assembly.
4.33.3
Remove the four or six screws securing the retaining ring on the knob
and magnet assembly, and remove the retaining ring.
4.33.4
Remove the magnet assembly from the knob and discard the magnet
in an appropriate manner.
4.33.5
Insert the new magnet assembly into the knob.
On new style knobs, make sure the magnet’s dowel pin engages the
slots in the knob. If the magnet is not oriented correctly there will be
freeplay in the knob before it turns the magnet.
4.33.6
Reinstall the retaining ring and secure it with the screws that were
previously removed.
4.33.7
Turn the set screws into the PEEP block until you can just see them
from the inside of the block.
4.33.8
Apply a thin coat of high vacuum grease to the O-rings on the magnet
assembly to aid in its installation.
4.33.9
Align the holes of the magnet assembly with the set screw holes, and
install the knob & magnet assembly into the PEEP block.
4.33.10 Slowly tighten the set screws. If the holes are lined up correctly. you
will be able to tighten the set screws several turns until they stop. If
you experience resistance, STOP tightening the set screw to prevent
damage to the magnet assembly. Re-align the magnet assembly and
tighten the set screw correctly.
4.33.11 Perform the PMS procedure given in Section 6.
Rev. W
4-107
Содержание Narkomed 2B
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