|
| |
TM 9-2320-356-BD
Section V.
ELECTRICAL MOTORS
8-15. GENERAL
Repair on automotive motors should be restricted to relays, solenoids, and
brushes.
Damage to casings and windings cannot be expediently repaired.
8-16.
ELECTRICAL ALTERNATOR/MOTOR BRUSH WORN
General Information:
Electrical motors and alternators use a carbon composition brush to transfer
electrical energy to or from the armature commutators.
The transfer of energy
creates an electrical arc which will burn the brushes.
Arcing and normal friction
will cause the brushes to become worn and inefficient for electrical power
transfer.
The brushes can be substituted with the carbon core from a BA30 or BA31
flashlight battery.
Care must be taken when opening the battery; the contents are
corrosive.
Brush retaining springs can be used to transfer the energy or to hold
the old brush wires in place.
Limitations:
o Shorter motor/alternator life
Personnel/Time Required:
o 1 to 3 soldiers
o 1 to 8 hours
Other Options:
o Modify and use other electrical brush sets.
Procedural Steps:
1.
Gain access to motor or alternator.
2.
Remove electrical brush plate.
3.
Obtain a BA30 or BA31 battery.
Materials/Tools:
o BA30 or BA31 battery
o Hacksaw
o Sandpaper
WARNING
The fibrous material of a battery is corrosive
and could cause injury to eyes and damage to
clothing.
4.
Use a hacksaw or other available tool and split the battery open, taking care
not to damage the carbon core.
5.
Clean and cut the carbon core to fit the brush plate receptacles.
8-16
|
