© ⅯⅯⅩⅢ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130115001
63
SuperLite
®
27
®
Chapter 7
Breathing System Maintenance and Repairs
7.1 Introduction
This chapter covers the maintenance and repair of all
components of the breathing system. The breathing
system includes the one way valve, the emergency
valve, the side block, the bent tube assembly, the de
-
mand regulator, and the oral nasal mask.
The breathing system on all Kirby Morgan helmets
and masks is simple and highly reliable. The fact that
they can continue to operate when the components are
not in a well-maintained condition can cause divers
to become complacent about maintenance.
Your life depends on the correct function of this
equipment!
While Kirby Morgan helmets and masks are simple
to maintain, like any type of life support equipment,
they do require regular periodic maintenance to func
-
tion properly.
All parts disassembled should be thoroughly cleaned
using the methods described in Chapter 6 Section
6.3. Components that require the use of lubricants,
sealing and thread locking compounds should also
be serviced.
Most fasteners have a torque value. It is imperative that
all fasteners which have a torque value be tightened to
the torque specifications as outlined by the procedure,
or as listed in table in the rear of this manual. If in
doubt as to the proper torque setting, contact your
local authorized repair facility or KMDSI.
7.2 Torque Values
All fittings must be tightened to their correct torque
values. See Appendix 1 in the rear of this manual for
the correct torque specifications.
7.3 One Way Valve
NOTE: The one-way valve assembly should be dis-
assembled, cleaned and the three o-rings should be
replaced at least annually. Damaged and/or corroded
parts should be replaced. A repair kit is available for
replacement parts, KMDSI Part #525-330.
Do not use pliers on the main body of the
one way valve. You may damage the valve
if pliers are used.
CAUTION
7.3.1 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)
To disassemble and inspect the one way valve as
-
sembly:
1) The one way valve assembly must be removed from
the side block. Use the open end wrench to remove it.
2) After the one way valve has been removed, use two
wrenches or hold the hex part of the body in a soft jaw
vise while removing the endcap/seat with a wrench.
As the seat is removed, the wiper and the o-ring slide
out in place in a groove on the endcap/seat. The poppet
and the poppet o-ring usually come out in the endcap/
seat being followed by the spring.
The only functional part remaining in the valve body
WARNING
Overtightening a part may lead to part
failure and improper operation of Kirby
Morgan life support apparatus. Under
tightening a part may cause the part to
come loose and may also lead to im-
proper operation of the equipment. Either
situation may lead to personal injury or
death.
