Functional Tests; Reassembly; Component Level Servicing Instructions; Replacement Of Hood - MSA S-Cap-Air Maintenance Manual

•
Bag:
Check for damaged stitching, rips, holes, abrasion etc. Check carrying strap and buck-
les. Examine completeness of the instructions for donning. If repair is not possible, re-
place bag.
4.4

Functional Tests

•
Pressure Indicator
Check against a standard gauge (e.g. that of a compressor), at 207 bar cylinder pres-
sure the indication must be in the green segment (cylinder full).
•
Cylinder and Valve
Check assembled and charged cylinder with closed valve (Screw cap with firing pin in
position) for leaks (use a suitable liquid leak detector, detector spray, or soap solution
and brush) Check burst disc, pressure indicator, charging port (without dust cap), hose
connector [valve closed] and charging port O-ring seat. Repair or replace gaskets as
necessary to eliminate all leaks. Check warning indicator (see 3.4). The leak test can
also be done with a properly charged (see 2.1) S-Cap-Air. Allow the unit to stand for
3 days and verifying that pressure has not dropped.
4.5

Reassembly

On reassembly avoid thread over tightening which may cause damage to the threads or
components. Only apply sufficient torque as given in this manual to achieve the necessary
thread engagement and "nip" on seals. Mark month and year of test on the carry bag label.
5

Component Level Servicing Instructions

5.1

Replacement of Hood

[Part number 10019509, Service Hood ( without items 9,10 and 11, see illustration on
page 14)]
Pull clip from hose connection, then pull supply hose off the connection. Unscrew the ex-
halation valve. Pull warning indicator/air outlet off hose, and pull hose out of hood. Take
new service hood and reassemble in reverse order.
Hose [Part number 10018456, Hose assembly spare part]
Push hose through hose loops into the hood, push indicator/air outlet [part number
10018455, Warning Indicator/air outlet spare part] on to hose when it is in the hood. It
must be impossible to pull the properly positioned hose out of the hood. The indicator must
be visible through the hood visor.
Screw in exhalation valve [part number 10019487, Exhalation valve assembly spare part].
Check O-ring on hose connection, replace if necessary [part number 10024118, O-ring for
hose connection, pg 10].
Check the two felt disks in the hose connection for cleanliness, if necessary, replace [part
number 10019508, felt disk, spare, pg 10]. Carefully push hose entirely on hose connec-
tion, lock it in position with the clip [part number 10019483, clip spare part, pg 5]. Finally
make function test.
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