TM 10-4930-251-12&P
Table 4-1.
UNIT PREVENTIVE MAINTENANCE\
CHECKS
AND SERVICES
(PMCS) MONTHLY
SCHEDULE
(Cont.)
9
Manhole
CAUTION
Cover
Assembly,
In freezing weather. especially
during
freezing precipitation,
ensure the vent
valve in the manhole is protected by
being located under the Fill PLUGHINGE.
Bolts and nuts are
Check the manhole gasket
for damage and replace
loose or missing
if necessary. Check for dents, cracks or breaks.
Cracks or breaks
Repair or replace defective
manhole cover and filler
exist. Cover gasket.
cover. Ensure that the manhole
mounting
hardware
manhole cover or
filler cover are
is tight. Check to see that the manhole cover hinge
and cam close tightly.
defective.
10
Coupling
Check for signs of leakage around the valve handle
Valve leaks, Valve or
Half
shaft. Check Coupling
gaskets for cracks. Inspect
Control
Lever Handle
coupling
for secure connection.
Test coupling
half
is worn or damaged.
by observing the internal
valve mechanism as the
handle is moved to ensure handle operates valve.
Replace damaged valve or handle lever.
11
Ground
Inspect cable for frayed, worn or corroded
Cable is missing or
Cable
condition.
Replace defective cable.
defective.
Section IV.
UNIT
MAINTENANCE
TROUBLESHOOTING
4-8.
General.
a. Thissection contains troubleshooting
information
for locating and correcting
problerns
which develop in the tank dispensing unit that are within the scope Of unit maintenance.
Each
malfunction
for an individual
component,
unit or system is followed
by a list of tests or
inspections to help determine corrective
actions for specific malfunctions.
Perform the
tests/inspections
and corrective actions in the order listed.
b.
This manual cannot list all malfunctions
that may occur, or all tests or inspections and
corrective actions. If a malfunction
is not listed or is not corrected by listed corrective
actions,
notify, your supervisor.
4-4
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