Reassembly Of The Demand Regulator - Kirby Morgan KMB-18 A/B Operation And Maintenance Manual

6) Inspect the regulator body (39). Check the
brazed joints for cracks. Make sure that the ad-
justment tube and inlet tube are in alignment.
They can become bent if the mask is dropped.
Replace the body if there is any sign of damage.
Make sure the outer circumference is round and
has no flat areas from damage.

6.14.5 Reassembly of the Demand Regulator

(63A/B)
1) Press the head of the inlet valve (59) into the
castle wrench (KMDSI Part #525-618).Load the
spring (58) and brass washer (57) onto the inlet
valve (59). With the inlet valve securely held,
insert it into the inlet tube in the regulator body
(39). The shaft of the inlet valve (59) will pro-
trude into the interior of the regulator body (39).
2) Place the washer (56) onto the shaft of the inlet
valve (59) rough side towards the regulator body.
Fig. 6.62 Press the head of the inlet valve (59)
into the castle wrench
CAUTION: This washer (56) is a
stamped part. One side is smooth and the
other side may have rough edges. Load
the washer (56) onto the inlet valve shaft
(59), rough side first, so that the rough
side will seat against the regulator body
(39). The smooth side will be out for the
lever (55) to act against. This will assure
smoother regulator operation.
3) Place the spacer (54) onto the shaft of the inlet
valve (59).
Document # 010518001 © Copyright 1970-2003 Kirby Morgan Dive Systems, Inc. All rights reserved.
KMB 18 & 28 MANUAL
4) Load a new locknut (53) into the socket of the
socket wrench from the KMDSI tool Kit. Insert it
through the adjustment shaft tube and run the nut
onto the inlet valve stem (59) for approximately
two threads to leave room for the installation of
the lever (55).
WARNING: The lock nut (53) must
always be replaced if removed from the
inlet valve (59). The plastic material that
locks the nut from unscrewing is not de-
signed for multiple reuse. If the nut was to
come loose this would cause the regula-
tor to reduce flow or supply no air to the
diver. Although the diver could still
breathe by manually operating the free
flow on the side block, this could cause
panic.
5) With the inlet valve (59) pushed in, the spacer
(54) and washer (56) should be loose on the inlet
valve shaft (59).
6) The lever (55) is installed next between the
spacer (54) and the washer (56). The lever legs
MUST be parallel to each other. Use a straight
edge to make sure the legs are in line. Bend with
pliers if necessary.
7) Hold the inlet valve (59) with the castle wrench
and tighten the nut (53) until two threads are
visible past the nut (53).
Fig. 6.63 Use the KMDSI socket wrench to turn the nut on
the inlet valve.
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