TM 55-4920-328-13
CHAPTER 6
MAINTENANCE INSTRUCTIONS
Section I. GENERAL INFORMATION
6-1. Scope.
Maintenance of METS systems and components
consists of the accomplishment of initial and periodic
servicing and lubrication procedures. In addition,
periodic cleaning, inspection, minor repair, and parts
removal and installation procedures are provided in this
section. Special maintenance tools used in the system
are required only for certain water brake assemblies
contained in the power absorption systems of the engine
accessories kits.
6-2. General Safety Precautions.
Exercise extreme care during maintenance of the
system. Observe all base safety regulations. The
following general precautions must be observed to
ensure the safety of operating and maintenance
personnel and to avoid damage to the equipment:
a. Prior to any maintenance action, ensure that
the generator set is deenergized to remove all power
from the electrical system. Attach a tag to the generator
control panel to warn other personnel that maintenance
is being performed. Check to ensure that all circuit
breakers in the power distribution box, circuit breaker
panel assembly, and generator control panel are in the
open (deenergized) position.
b. Prior to disconnection of hydraulic hose
assemblies and tube assemblies, place a catch basin of
adequate capacity under the quick-disconnect or
bulkhead fittings to contain spillage of fluids (JP-4 or JP-
5 fuel, turbine lubricating oil, or water). This action will
prevent
damage
to
the
equipment
and
inhibit
contamination and corrosion.
c. Prior to disconnection of individual wire runs
from panel instrumentation and electrical components,
attach a small tag to each wire to be disconnected.
Note on each tag the information required to facilitate
installation. This action will precent miswiring and
preclude the necessity for troubleshooting modular units.
d. During maintenance actions, handle all meters,
gages, indicators, transducers, and transmitters with
extreme care. Avoid the use of incorrect hand tools
during removal and installation. Follow the procedures
outlined in this chapter of the manual during any
maintenance action. If an instrument or meter is
dropped, obtain a replacement part from Unit Supply
and route the damaged instrument to the facility
instrument repair shop.
e. Do not exert force to connect electrical plugs
and connectors to mating receptacles at installation.
The large number of cable assemblies used in the
system requires that the correct cable assembly be
connected in accordance with the cable interconnecting
diagrams provided in chapter 2, and in accordance with
the Group Assembly Parts Lists contained in chapter 7.
f. During removal of components and parts, place
the
attaching
parts
in
Specification
MIL-B22205
transparent bags. Tie the bag to the structural unit from
which the part was removed.
g. Use extreme care when soldering electrical
connections; use a heat sink when damage to a
component may result from excessive heat. Solder
electrical connections in accordance with applicable
Military Specifications, using the correct type of solder
specified in table 1-8.
h. Tighten all attaching parts and hydraulic tube
fittings in accordance with the torque values specified in
table 6-5.
i. Observe all rules of cleanliness during
maintenance actions. Use a clean, dry, lint-free cloth
for wiping all parts after dry cleaning solvent has been
used for cleaning. Remove stubborn deposits of foreign
matter from metallic, unpainted surfaces (excluding
instrumentation) by the use of the maintenance shop
cleaning and degreasing facilities. Do not immerse
instruments, meters, gages, transmitters, or transducers
in gaseous or liquid cleaning agents. Refer to table 1-8
for
information
on
cleaning
agents.
6-1
