Table 4-1. Organizational Preventive Maintenance Checks and Services
Quarterly Schedule - (Cont)
Item to be
Check for and have repaired
be reported Not
or adjusted as necessary
Ready (Red) if:
Add fuel as required. Tighten loose
Leakage of fuel is
mounting. Replace leaking fuel tank.
Replace defective cap gasket. Clean
cap vent, (para. 4 -24).
Tighten thumb nut if gasket is leaking.
Clean screen, (para. 4-24).
Oil Level Plug
Check that oil level is at second thread
of oil plug hole. Add oil as required.
Refer to current L.O. (fig. 3-l).
Inspect for broken seal. Check hose
Missing or discharge
for wear and deterioration. Check for
broken nozzles. Weigh the fire ex-
tinguisher (CO2) and subtract from
this weight, the empty weight (stamped
on the valve body). If the resulting net
weight (stamped on the extinguisher)
has decreased 10% or more, the cyl-
inder should be replaced or recharged.
Forward extinguisher to next higher
level of maintenance if weighing capa-
bility does not exist.
Check screen for dirt or damage.
S c r e en
Clean or replace a dirty or damaged screen.
s c r e e n.
Check control lever for binding or
Evidence of leakage.
damage. Check valve for leaks. Re-
L e v er
place damaged control lever. Tighten
or replace a leaking valve.
Check vent assembly for dirt or dam-
Damaged air vent.
A s s e m b ly
age. Clean or replace a dirty or
damaged vent assembly.
During operation observe for any un-
usual noise or vibration.