One-Way Valve; Disassembly Of The One-Way Valve - Kirby Morgan KMB-18 A/B Operation And Maintenance Manual

KMB 18 & 28 MANUAL
Fig. 5.8 Unscrew the nose block packing nut.

5.5.3 One-Way Valve (103)

5.5.3.1 Disassembly of the One-Way Valve

Tools Required:
Soft Jaw Vice
1 inch Open End Wrench Attachment on Torque
Wrench
(If no vise is available use a backup 1 inch open
end wrench)
Disassemble and inspect the one-way valve as-
sembly (114)
1) The one-way valve assembly (114) should be
removed from the side block (94a/b).
Fig. 5.9 Remove the one-way valve from the sideblock.
2) After the one-way valve has been removed, use
two wrenches or hold the hex part of the body
(112) in a vise while removing the seat (106) with
a wrench.
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© Copyright 1970-2003 Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 010518001
CAUTION: Do not use pliers on the
main body of the one-way valve. You may
damage the valve if pliers are used.
As the seat (106) is removed, the wiper (107) and
the O-ring (108) slide out in place in a groove on
the seat (106). The poppet (110) and the poppet
O-ring (109) usually come out in the seat (106)
being followed by the spring (111). The only
functional part remaining in the valve body (112)
is a non-moving, pressed-in cage. The function of
the cage is to prevent the poppet O-ring (109)
from blowing out of place during high flows.
Fig. 5.10 If no vise is available you may use two wrenches
to disassemble the valve.
3) Inspect the body (112) interior for foreign
matter of any type and clean, if necessary.
4) Inspect the seat (106), wiper (107), O-ring
(108), poppet O-ring (109) and poppet (110) for
wear, replace if necessary. Be sure each part is
clean. A repair kit is available for replacement
parts. (KMDSI Part #525-330).