technical manual operator instructions
technical manual operator instructions
technical manual operator instructions
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Table 2-1. PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR MASK,<br />
CHEMICAL-BIOLOGICAL: M45 (con’t)<br />
ITEM<br />
NO.<br />
6<br />
con' t<br />
INTERVAL LOCATION PROCEDURE NOT FULLY MISSION<br />
CAPABLE IF:<br />
ITEM TO<br />
CHECK/<br />
SERVICE<br />
After<br />
Outlet<br />
Valve Disk<br />
and Outlet<br />
Valve<br />
Cover<br />
d. Check outlet valve<br />
seat (4) for dirt, nicks, or<br />
cracks. Smooth outlet<br />
valve disk (3) so it lies<br />
flat on seat.<br />
Outlet valve seat is<br />
nicked or cracked, or<br />
disk will not seat<br />
properly.<br />
e. Check that barb (5) is<br />
not broken or cracked.<br />
f. Wipe moisture and dirt<br />
from outlet valve cover<br />
(2) with cheesecloth (item<br />
3, app D) and check for<br />
cuts, tears or holes.<br />
Barb is cracked or<br />
broken.<br />
Outlet valve cover is<br />
cut, torn, has holes, or<br />
will not seat firmly over<br />
outlet valve.<br />
g. Reinstall cover.<br />
2-25
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