and blowers are also desireable service
any special cleaning procedures will be
items.
mentioned in text wherever required.
STEAM CLEANING. A steam cleaner is a
Various factors such as the type of oper-
n e c e s s a r y item in a large shop and is
ation of the engine, hours in service and
most useful for removing heavy accumu-
next overhaul period must be considered
lations of grease and dirt from the exte-
when determining whether new parts are
rior of the engine and its subassemblies.
installed or used parts are reconditioned
to provide trouble free operation.
SOLVENT TANK CLEANING.
A tank of
sufficient size to accommodate the largest
For convenience and logical order in dis-
part that will require cleaning (usually
assembly and assembly, the various sub-
the cylinder block) should be provided
assemblies
and
other
related
parts
and provisions made for heating the cle-
mounted on the cylinder block will be
aning solution to 180-200F (82-90C).
treated as separate items in the various
subsection of this section.
Fill the tank with a commercial heavy du-
ty solvent which is heated to the above
temperatures .
Lower large parts direct-
Disassembly
ly into the tank with a hoist. Place small
parts in a wire mesh basket and lower
Before any major disassembly, the engine
them into the tank.
Immerse the parts
must be drained of lubricating oil, water
long enough to loosen all of the grease
Lubricating oil should also be
and fuel.
and dirt.
drained from the torque converter.
RINSING BATH.
Provide another tank
To perform a major overhaul or other ex-
of similar size containing hot water for
tensive repairs, the complete engine as-
rinsing the parts.
sembly, after removal from the machine,
should be mounted on an engine overhaul
Parts may be dried with com-
DRYING.
stand; then the various subassemblies
The heat from the hot
pressed air.
should be removed from the engine.
tanks will quite frequently complete the
When only a few items need replacement,
drying of the parts without the use of
it is not always necessary to mount the
compressed air.
engine on an overhaul stand.
RUST PREVENTIVE. If parts are not to
Parts removed from an individual engine
be used immediately after cleaning, dip
should be kept together so they will be
them in a suitable rust preventive com-
available for inspection and assembly.
The rust preventive compound
pound.
Those items have machined faces, which
should be removed before installing the
might be easily damaged by steel or con-
parts in an engine.
should be stored on suitable
crete
w o o d e n racks
or
blocks,
or
a
parts
dolly.
Inspection
The purpose of parts inspection is to de-
Cleaning
termine which parts can be used and
Although the
which must be replaced.
Before removing any of the
GENERAL.
overhaul
specifications
given
engine
subassemblies from the engine (but after
throughout the text will aid in determin-
removal of the electrical equipment), the
ing which parts should be replaced, con-
exterior of the engine should be thor-
siderable judgment must be exercised by
Then, after each sub-
oughly cleaned.
t h e inspector .
removed and disassembled,
assembly is
the individual parts should be cleaned.
The guiding factors in determining the
Thorough cleaning of each part is abso-
usability of worn parts, which are oth-
before
it
can
be
necessary
lutely
erwise in good condition, is the clearance
Various items
satisfactorily inspected.
between the mating parts and the rate of
of equipment needed for general cleaning
w e a r o n e a c h o f t h e p a r t s . If it is de-
a r e listed below.
termined that the rate of wear will
maintain the clearances within the speci-
The cleaning procedure used for all or-
fied maximum allowable until the next
dinary cast iron parts is outlined under
overhaul period, the reinstallation of
Clean C y l i n d e r B l o c k ( s u b s e c t i o n 1 1 B ) ;
