TB
5-4220-200-12-1
Table 3-1. WEEKLY PREVENTIVE MAINTENANCE CHECKS AND SERVICES
W-WEEKLY
TOTAL MANHOURS REQUIRED 0.5
Work
Sequence
Item to be Inspected
Number
Procedure
Time
M/H
1
TANKS
Inspect tanks, manifold assembly. tank stabilizer bands, for rust. corrosion and dam-
0.1
age. Tighten exterior screws. bolts, and nuts carefully after inspecting for thread dam-
age. Inspect harness straps for wear or damage. Insure that tanks. manifold and har-
ness are free of dirt, verdigris and other foreign matter. Check tanks to verify next re-
quired hydrostatic test (every 5 years). Verify next required internal (visual) tank in-
spection.
2
DEMAND REGULATOR
Inspect hose for dry rot, cuts; hose connectors for proper seating and thread damage.
0.1
Clean filter and inspect for damage. Conduct air leakage test: with the first stage regu-
lator cap assembly seated, attempt to breathe from the second stage regulator. Any air
received indicates an air leak in the first or second stage regulator
3
GAUGES
Inspect rubber gauge cover for dry rot and cuts. Inspect for broken glass. Check
0.1
against a master reference gauge for operational accuracy. Inspect hose for dry rot
and cuts; hose connectors for proper seating and thread damage Insure that gauges
are free of dirt and verdigris.
4
OPERATIONAL CHECK
0.1
Connect the major components and conduct operational check. Be alert for unusual
operation or condition; i.e., air leakage. or improper breathing resistance. Conduct an
air leakage test with ample air supply in the tanks and the manifold valve control in the
"on" position; then submerge the equipment in water and check for air leaks.
5
STORAGE
0.1
Dry the equipment and store in a dry cool well ventilated area.
3-2