|
| |
TM5-4120-387-14
c .
d.
Inspection
(1) Check for punctures, cuts, and other visible damage.
(2) Check for packed or mashed areas that would block air flow.
(3) Replace if defective.
Installation.
(1) Slide mist eliminator straight down into brackets.
(2) Using screwdriver, secure four screws on two brackets.
Follow-on procedure:
Install top panel.
(See para 4-23.)
4-27. ELECTRICAL WIRING REPAIR GENERAL
Preferred repair methods consist of replacing wires, terminals, connectors, etc.,
rather than splicing wires, bending ends to form terminals, and other make-shift
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 table 4-3, “Wire List”, and to the wiring
diagram (figure 4-7).
Soldering connections.
Wire connections must be made mechanically sound
before they are soldered; solder alone does not provide sufficient strength to
prevent breakage.
Joining surfaces of connections to be soldered must be clean
and bright.
If a separate flux is used, it should conform to Specification
MIL-F-14256, rosin base flux, item 16, Appendix E, and should be brushed onto the
joint before soldering.
If a flux-core solder is used, it should always be
rosin-core electrical solder.
If an uncored solder is used, it should be a
lead-tin solder, item 2, Appendix E, conforming to Specification QQ-S-571. Wires
should always be heated to the point at which the solder will melt completely and
flow into all parts of the joint.
Excessive build-up of solder “gobs” on the
joint should be avoided or removed.
b.
Insulating joints.
The preferred method of insulating electrical joints is
by the use of heat-shrink tubing.
To apply, cut a piece of heat-shrink tubing of
suitable diameter to a one-inch length for covering joints at terminals or connec–
tors, or to a length about 1/2 inch (13 mm) longer than the joint to be insulated,
and slide the tubing over the wire before making the joint.
After the joint is
made, slide the tubing so that it covers the joint, and shrink in place with
moderate heat.
c.
Splicing wires.
To repair broken or cut wires that are otherwise sound, the
mating ends can be stripped and spliced.
A commercial butt splice can be crimped
onto the end to join them, or a “Western Union” wire splice can be made.
The
latter is made by stripping 1/4 - 1/2 inch (0.6 - 13 mm) of insulation from the
wire ends, holding the ends parallel and facing opposite directions, then twisting
each end around the other wire at least three turns.
Solder and apply insulation
as described above.
4-69
|
