TM 10-4930-220-13&P
2-4. Preventive Maintenance Checks and Services
a.
Table 2-2, Preventive Maintenance Checks and Services Table lists the inspections and care of equip-
ment required to keep it in good operating condition.
b. Leak definitions for operator/crew PMCS shall be classified as follows:
Class I
Seepage of liquid (as indicated by wetness or discoloration) not great enough to form
Class
Class
Class
l
l
l
drops.
II
Leaks of Iiquid great enough to form drops but not enough to cause drops to drip or run
from the faulty area.
III
Leak of Iiquid great enough to form drops that fall or run or collect in puddles near the
faulty area.
IV
Leak from under the tank Shown by:
i) Dampness of the ground around the tank.
ii) Volume of Iiquid in the tank less than it should be.
Equipment operation Is allowable with minor leak (class I or II).
When operating with class I or II Ieaks continue to check them visually at reg-
ular intervals.
Class Ill and class IV leaks should be reported to your supervisor.
Table 2-2. OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
Item
No.
1
2
3
4
2-4
Interval
Before
Before
Before
Before
Location
Item to
Check/
Service
Hoses
Nozzles
Ground Cable
Emergency
Dump Valve
and Control
Lever
Procedure
Check for leaks, breaks, cracks, cuts and worn
areas. Refer leaking, worn or damaged hose to
unit maintenance.
Check nozzles for distortion, corrosion and
leaks. Clean corroded nozzle. Clean strainer
daily. Replace gasket at hose connection. Refer
distorted, leaking or badly corroded nozzles to
unit maintenance.
Check for worn, frayed or corroded condition.
Refer worn, frayed or corroded cable to unit
maintenance.
Check control lever for binding or damage.
Check valve for leaks, close control lever tight-
ly. Replace gasket in coupler. Refer worn or
damaged valve or control lever to unit mainte-
nance.
Not Fully Mission
Capable
Hoses are leaking, worn
or damaged.
Nozzles are distorted,
leaking or badly corroded.
Cable is worn, frayed or
corroded.
Valve or control lever is
worn or damaged.
