INTRODUCTION
This manual in intended for use with Department of
the Navy SAR/SCBA respirators only. Do not use the
procedures in this manual for maintaining self-con-
tained breathing apparatus (SCBA) regulators. Airline
regulators are designed for pressures up to 80psig.
Their use with an air source in excess of 80psig may
result in airline regulator rupture, causing serious per-
sonal injury or death.
Do not attempt repairs beyond those specified in this
manual. Only trained or certified personnel, authorized
by MSA, are permitted to maintain and repair this
apparatus. Breathing apparatus must not be repaired
beyond manufacturer's recommendations. OSHA 29
CFR Part 1910.134, Par. (f) (4) clearly defines these
requirements.
GENERAL NOTES
The General Notes which follow may be applied to all
applicable procedures.
NOTE 1: The maintenance procedures authorized in this
manual are classified Level II Maintenance. Level II is lim-
ited maintenance. It is intended for those trained and cer-
tified in using MSA Portable Regulator Testers.
NOTE 2: All O-rings and gaskets which are removed must
be replaced with new ones.
NOTE 3: Lubricate all O-rings with a very thin film of
Christo-Lube** (P/N 809059) before they are installed.
Christo-Lube lubricant is compatible with brass and alu-
minum.
NOTE 4: When installing O-rings over threads, use trans-
parent tape, a thin piece of paper, or other thread protec-
tor to avoid damage to the O-ring.
NOTE 5: Pipe-sealing tape is used on fittings with tapered
threads. Wrap 1 to 1-1/2 turns of tape in a clockwise
direction (looking into the threaded end of the fitting).
Start at the second thread. Do not put tape on the first
thread. Pieces of tape can break off and reduce air flow.
Apply a thin film of Christo-Lube lubricant to the outer
surface of the tape before threading the part into another
component.
Do not use Flourolube* lubricant (P/N 27912). It is not
compatible with aluminum. Failure to follow this warn-
ing can result in serious personal injury or death.
Refer to the appropriate Illustrated Parts List for the appa-
ratus being repaired.
Do not disconnect if pressurized. Always be sure to
release all pressure from the system. Removing the
coupling nut with the regulator pressurized can result
in serious personal injury, death, or damage to equip-
ment.
Leak test after each repair (see Level I).
* Fluorolube is a registered trademark of Hooker Chemical and
Plastics Company.
** Christo-Lube is a registered trademark of Lubrication Technologies.
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TAL 4011 (L) Rev. 3 - 817081
TABLE OF CONTENTS
Introduction .........................................................................2
Mask Mounted (Second Stage) Regulator Repair ..............3
Mask Mounted Regulator Static Pressure Test ..................7
Cylinder Valve Repair ..........................................................8
High Pressure Regulator ...................................................11
Low Pressure Alarm ..........................................................11
Intermediate Pressure Hose..............................................11
High Pressure Hoses.........................................................12
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