INSTRUMENT PANEL

TM 5-4110-234-14

TO 40R7-5-7-1

c. Repair or Replacement. 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 of wire, terminal or connector to be used for

replacement by referring to the applicable wire list (tables 4-4 or 4-5) and wiring diagram (figs. 4-5 or 4-6).

(1) Soldering Connections. Wire connections must be made mechanically sound before they are soldered;

solder alone does not provide sufficient strength to prevent breakage. Surfaces of connections to be soldered, must be

clean and bright. If a separate flux is used, it should conform to Specification MIL-F-4995, Type I, rosin- alcohol flux, 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 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 globs on the joint should be avoided or removed.

(2) 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 (2.54 cm) length for covering joints at

terminals or connectors, or to a length about 1/2 inch (1.27 cm) 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 over the joint, and shrink in place with

moderate heat.

(3) 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 ends to join them, or a Western Union wire splice can be

made. The latter is made by stripping 1-1/4 inch (3.18 cm) 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) Crimping Terminals. To install a terminal on the end of a wire, strip 1/4 to 1/2 inch (0.66 to 1.27 cm) of

insulation from the end of the wire, apply a one-inch (2.54 cm) piece of heat-shrink tubing (if the terminal is of the

uninsulated type), and insert wire-end into the shank of the terminal. Crimp the shank, and install heat-shrink tubing if

necessary.

Close hinged control panel and install the retaining screws. Close access doors and connect power source.

4-20. INSTRUMENT PANEL See figure 4-14.

The instrument panel is partially rigid and partially hinged to allow access to controls. The hinged portion has operating

instructions and the refrigeration schematic printed on the front and the wiring diagram printed on the back.

Always disconnect power from battery (F10000RG-2) or power source (F10000R-6) prior to opening the

hinged instrument panel.

4-21.

HOURMETER See figure 4-14.

a. Test/Operate. Observe the meter from time to time while the unit is operating. If there is no change in the

reading and there is no wiring defect, the meter is defective and must be replaced.

Removal.

(1)

Disconnect power.

(2)

Remove the three screws and nuts that secure the meter in place.

(3)Disconnect and tag the leads to the meter.

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