TM 3-4240-212-14&P
Table 4-1 Organizontal Preventive Maintenance Checks and Services-- (Continued)
Work
Work
Sequence
Item to be inspected
time
number
procedure
(M/H)
8
PLUNGER VALVE ASSEMBLY
Insure that Inside of valve assembly Is free of oil, dirt, or grease.
If malfunction, notify higher maintenance
0.1
9
TIMER
Test accuracy of timer
0.3
0.2
10
HARNESS ASSEMBLY
Inspect webbing for damage Inspect for corroded or missing hardware
0.1
0.2
SECTION III-Accessories
Man-hours required: 0.6
11
CARRYING CASE
Inspect for damage, pay particular attention to leather strap handle
and luggage clamps
0.1
Replace, If necessary
0.1
12
M20 OBA HOOD
Inspect for tears or leaks
0.1
13
SPANNER WRENCH & ANTIFOGGING KIT
Inspect for damage
0.1
Replace, if necessary
0.1
Section III. ORGANIZATIONAL TROUBLESHOOTING
M20 breathing apparatus or its components should perform
4-4. SCOPE
the tests/inspections and corrects tons In the order listed.
NOTE
a.
This section contains troubleshooting or
Before you use this table, be sure you have
malfunction Information and tests for locating and
performed all normal operational checks If you
correcting most of the troubles which may develop in the
have a malfunction which Is not listed in this table,
M20 breathing apparatus Each malfunction or trouble
notify the next higher level of maintenance.
symptom for an individual component, unit, or system Is
followed by a list of tests or Inspections necessary for
Table 4-2. Organizational Troubleshooting
you to determine probable causes and suggested
corrective actions for you to remedy the malfunction.
Malfunction
b. This manual cannot list all possible malfunctions
test or Inspection
that may occur or ail test or inspections, and corrective
corrective action
actions. If a malfunction is not listed (except when
1. AIR IN FACEPIECE IS ODOROUS OR IRRITATING
malfunction and cause are obvious), or is not corrected
Step 1.
by listed corrective actions, you should notify higher
Step 2.
Defective pressure relief valve Repair
level maintenance
c. Table 4-2 lists the common malfunctions that
Step 3.
Breathing bag torn or damaged Notify
you may find during the operation or maintenance of the
higher maintenance
4-2
Change 2