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Page Title:
CHAPTER 6. OVERHAUL OF ENGINE COMPONENTS |
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 CHAPTER
6
OVERHAUL
OF
ENGINE
COMPONENTS
Section
l.
GENERAL CLEANING, INSPECTION,
REPAIR,
AND
ASSEMBLY PROCEDURES
6-1. General
(2) Hands should be kept free of any ac-
cumulation of grease, which can collect dust and
grit.
a. Procedures. The procedures for cleaning,
(3) After cleaning, all parts should be cov-
inspection, repair and assembly of the various
ered or wrapped to protect them from dirt and
parts and components which make up the engine
dust
accumulation.
subassemblies will be the same for a great
b.
Castings.
percentage of parts and components. To avoid
(1) Remove sludge and gum deposits using
repetition, the general procedures are detailed in
a stiff brush.
6-2 through 6-6 and will be
(2) Clean all surfaces with dry-cleaning
referenced
throughout this chapter. Any
solvent or mineral spirits paint thinner. Repeat
repair,
and assembly
cleaning,
inspection,
operation if surface is not free of scale or
procedures which are peculiar to a specific part
adhering
material
which
might
be
dislodged
or component will be covered in the section or
later.
paragraph relating to that
item. Aluminum
(3) Blow out all tapped holes with com-
castings must be realodized
or coated in ac-
pressed air.
cordance with
MIL-C-5541A
whenever
coating
(4) After cleaning, dry casting with com-
is marred.
pressed air.
b. Tables will be used to list the various
Warning: Particles blown by compressed air
operations and components involved in the
are hazardous. Make certain air stream is
overhaul of engine sub-assemblies. Paragraph
directed away from user and that other persons
and / or figure references for disassembly,
are not exposed. Protect eyes and face with
repair,
inspection,
cleaning,
and assembly
appropriate
shields.
procedures will be listed in
these
tables
under
c. Oil Passages. Particular
attention
must
be
their appropriate heading.
g i v e n to all oil passages in machined parts. All oil
c. The
Repair
Parts
section
of
the
manual.
passages must be free of obstructions.
locate points of measurement for overhaul limits.
(1) Clean passages with wire or probes to
break up all sludge or gum deposits.
Cleaning
Instructions
(2)
Wash
passages
by
flushing
with
dry-
a. General. The importance of
cleaning must
cleaning solvent or mineral spirits paint thinner.
be thoroughly understood by
maintenance
Be sure passages are free from obstructions and
personnel. Great care and conscientious effort
clear
any
particles
which
might
later
become
are
required
in
all
cleaning
operations.
The
dislodged and contaminate the oil system.
presence of dirt or foreign material is a constant
(3) After cleaning, dry passages with
threat to satisfactory engine operation and
compressed air.
maintenance. A dirty operation can result in
d. Electrical Cables and Flexible Hoses.
cylinder scuffing or scratching, high oil con-
Clean cables and flexible hoses with soap and
sumption, bearing destruction, and a variety of
water.
component failures directly attributed to the
Note. Do not allow dry-cleaning solvent or
entrance of dirt. Maintain
rigid
cleaning
mineral spirits pain thinner to be in prolonged
standards during all phases of the cleaning
contact with the rubber components and flexible
operation.
The
following
general
instructions
hoses. These cleaners cause leather, rubber, and
apply
to
all
cleaning
operations.
synthetic materials to dry, rot, and lose pliability,
(1) Clean all parts before inspection, after
making
them
unserviceable.
repair, and before assembly.
6-1
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