Section III. DIRECT SUPPORT MAINTENANCE PROCEDURES
3-8. GENERAL MAINTENANCE PROCEDURES.
Electrical Motor and Generator Repair. Repair electric motors and generators in accordance with TM 5-764.
High voltage is present on this equipment. Do not perform
maintenance with power on. Death or serious injury may result to
(1) General. Wires on Laundry Units, whether run individually or in a harness, are color coded. Be sure to tag
all wires upon disconnection to ensure proper installation. Preferred repair methods consist of replacing
wires, terminals, connectors, etc., rather than splicing wires, bending ends to form terminals, and other
makeshift procedures, although the latter may be appropriate for emergency field repairs. Determine the
proper size and length of wire, or the terminal, or connector to be used for replacement by referring to
Appendix F. Cable Diagrams, Wire Run List, and Control Circuits.
(2) Inspection. Inspect insulation for cracks or frayed material. Pay particular attention to wires passing through
holes in the frame over rough metal edges. If wire is cut or broken and the break in the wire is exposed, the
wire must be repaired as in substep (5) below. If the break in the wire is in a harness, conduit, or
inaccessible area, replace the wire as in substep (6) below.
(3) Testing for broken wires. Set multimeter to low ohms scale and zero the meter. Isolate the wire to be tested
by disconnecting at least one end. Connect the multimeter probes to each end of the wire. A measurement
of zero ohms indicates continuity (wire is unbroken). A measurement of high resistance (infinity) indicates no
continuity (wire is defective). If the wire is defective, repair or replace it in accordance with substep (5) or
(4) Testing for grounded wires. Set multimeter to high ohms scale and zero the meter. Isolate the wire to be
tested by disconnecting at both ends. Connect the multimeter probe to frame ground, and connect remaining
probe to either end of the wire. A measurement of high resistance (infinity) indicates no continuity (not
grounded). If the wire is defective, replace it in accordance with substep (6).
(5) Repair. Use electrical repair kit or shave the insulation on the wire to expose 1/2 inch (1.27 cm) of bare wire
at both ends of the break. Twist the bare wire together and solder the connection. Cover the break with
electrical friction tape (Appendix D, Item 13). Be sure to leave no bare wire exposed. If a terminal lug
breaks off a wire, replace it with an exact duplicate.
(6) Replacement. Replace a wire by disconnecting it from the component or components it is attached to and
remove the wire. Connect a new wire to the component or components. If a broken wire is part of a
harness, disconnect the wire at each end and tape the loose ends with electrical tape. Install a new wire and
attach it to the outside of the wiring harness.
Bearings. For cleaning and inspection of antifriction bearings, refer to TM 9-214.