Section I. SERVICE UPON RECEIPT OF MATERIAL
(4) Spanner wrench.
4-1. Servicing New (or Used)
(5) Antifogging kit.
(6) Instruction card.
a. Remove M20 breathing apparatus from carrying
c. Install the timer and bracket assembly on the ap
paratus if it has not been installed previously (para 4-10).
b. Make sure that the following items (fig. 1-1) are
Perform preventive maintenance checks and
included with the apparatus:
(2) Canisters (three).
e. Correct or report all defects.
(3) Technical manual.
f. Return M20 breathing apparatus to carrying case.
Section II. PREVENTIVE-- MAINTENANCE CHECKS AND SERVICES
NCO or Officer.
The preventive-maintenance checks and services (table
4-3. Explanation of Columns
4-1) provide you with
of maintenance services that
A number In the sequence number column Indicates the
must be performed at the intervals prescribed. Use the
numerical sequence in which the service opposite the
list to make sure that all required maintenance is ac-
number must be performed. Time required to perform the
complished. If corrective action Is not authorized at
monthly checks and services is listed in man-hours
organizational level, report equipment defects to your
Table 4-1. Organizational Preventive Maintenance Checks and Services
Total man-hours required: 2.9
Item to be inspected
Section I-Facepiece Group
Man-hours required: 1.2
Inspect for scratches, chips, or breaks
Replace, If necessary
If found, notify higher maintenance
Inspect for damage, cuts, or deterioration
Inspect for broken straps, deterioration, or loss of resiliency
PRESSURE RELIEF VALVE
Insure that valve operates freely
SECTION II-- Backplate Assembly and Harness Assembly
Man-hours required. 1.1
Inspect for holes, tears, and signs of deterioration If found, notify higher maintenance
Be sure that handwheel turns freely Inspect for damage or corrosion.
If found, notify higher
Change 2 4-1