Western Star 47X 2020, Руководство по обслуживанию

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54–01 Trailer Cable Inspection
and Cleaning
1. Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires.
2. Inspect the cables for cuts, abrasion, or other
damage. If internal wiring is exposed, replace the
cables.
3. Disconnect the trailer electrical cables from the
sockets at the cab.
4. Inspect the cables and sockets for evidence of
corrosion, and clean as necessary. If a socket is
too badly corroded to clean, replace it. If corro-
sion has gotten into the wires and connectors
inside the socket, replace the cable.
IMPORTANT: If using a spray cleaner to remove
corrosion, be careful to protect any surrounding
painted surfaces. Follow appropriate safety
measures.
5. Coat the inside of the sockets with a lithium-
based dielectric grease such as Lubriplate FLP
DS–ES.
6. Connect the cables.
54–02 Electrical Component
Inspection
1. Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires.
2. Disconnect the batteries.
3. Inspect the condition of the electrical component.
Check for signs of excess dirt/debris build up on
or around component. If exterior cleaning is
needed for a thorough inspection, clean exterior
debris from the component using a dry method
such as a vacuum cleaner or using an electrical
contact cleaner such as CRC QD® Electronic
Cleaner.
4. Check all mounting points for loose, broken, or
missing parts. Component must be securely
mounted. All loose, broken, or missing parts
must be repaired to maintain proper component
function.
5. Inspect the component protective cover for
proper fit and function. Inspect cover for cracks,
broken mounting, missing sealing surfaces,
warped or bulged surfaces. The cover must pre-
vent moisture and debris from entering the com-
ponents protected area. Missing, leaking, or
damaged covers will result in moisture and de-
bris entering the component and will result in
component failure. When it is determined that a
cover has not properly prevented moisture and
debris from entering the component, the entire
component must be replaced.
6. Inspect the component exterior for signs of ther-
mal distortion, warping, bulging, discoloration,
amperage related heating, color variance or
shading across component which could be a sign
of internal failure requiring replacement of the
component. The root source causing conditions
of high heat, excess amperage, and/or circuit
overload component failures must be diagnosed
and repaired prior to replacing the component.
7. Inspect component housing sub-assembly clips
and fasteners for correct fit and location and that
component sub-assembly housing seams are
tight and secure. Missing, leaking, or damaged
component housings must be replaced.
8. Check main power cable connections for a clean
and secure fit. Connections should be free of
corrosion, dirt and moisture. Connections should
not have signs of thermal distortion, warping, dis-
coloration, high amperage heating or discoloring.
If needed, disconnect cables, scrub and clean as
needed using a nylon brush. Clean debris with
vacuum or electrical contact cleaner such as
CRC QD® Electronic Cleaner, inspect terminals
and mating contact terminal plating. If the termi-
nal plating exhibits signs of unrecoverable corro-
sion, the component and terminal will need re-
placed. Indications of unrecoverable corrosion on
terminal plating are:
•
Heavy staining that cannot be cleaned off
with nylon brush or contact cleaner;
•
erosion and pitting on terminal plating
causing uneven surfaces; or
•
discoloration caused by outer layer of plat-
ing being removed by corrosion or wear
exposing the under layer material of termi-
nal.
Electrical, Instruments, and Controls
54
47X and 49X Maintenance Manual, August 2020
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