TM 5-3810-307-24-1-1
MAINTENANCE
4.
Incorrect wire size.
GENERAL.
Electrical system maintenance includes replacement of
5.
Worn brushes.
damaged components. Standard wiring practices
should be observed when replacement is necessary.
6.
Improper spring tension on the brush assembly.
7.
Loose setscrews on the collector ring assembly.
WARNING
To isolate electrical problems, a multimeter should be
If it should become necessary to perform
used. The multimeter, when used properly, can
electrical maintenance on live or hot
provide readings necessary for service personnel to
circuits, remove all rings, watches, and
determine the following:
other
jewelry
before
performing
maintenance as serious burns result from
1.
Opens in the electrical system.
accidental grounding or short-ing circuits.
2.
Resistance in the electrical system.
WARNING
If problem is not in the swivel, there may be a loose or
Ensure the batteries are disconnected
corroded connection in the pin type connectors. Check
before performing any maintenance on an
the connectors to ensure that the wire pins are properly
electrical circuit.
seated and engaged in the receptacle. If the male and
female pins show any signs of corrosion, use a good
CAUTION
quality electrical contact cleaner or a fine sandpaper to
clean them. When the pins show signs of arcing or
Never replace original wiring with wiring of
burning, it will probably be necessary to replace them.
a smaller diameter.
Since the contacts are crimped on the wires, it is not
possible to remove them for reuse.
Most problems associated with the electrical system
can be traced to the electrical swivel. Problems
The following tables list the tools necessary for
common to the swivel are:
connector maintenance.
1.
Improper mounting.
Use the proper extraction tool to remove the contact(s)
from the plug or receptacle. Cut the wire as close to
2.
Foreign material between the brushes and slip
the contact as possible. After cutting, the wire will most
rings.
likely be too short. Use of a wire that is too short will
cause another failure due to excessive strain on the
3.
Incorrect
wiring
from
the
swivel
to
the
crimped joint when the contact is inserted into the plug
components.
or receptacle. Add a short length of the same size wire
to the short wire by crimp splice or solder. Use heat
shrinkable tubing or other suitable material to insulate
the splice.
2-14-14
