Figure 4-8.-SIMM keyed text.
PARTS LOCATION AND IDENTIFICATION
sufficient meaningful data for ordering purposes. When
complex assembly and disassembly procedures are
Equipment and assembly halftones and line
involved but not obvious, detailed procedures are given.
drawings are overlaid with a blue-colored grid on which
Exploded views on the same or facing pages will
coordinates are placed to assist in parts location.
describe and illustrate these procedures.
Associated with the parts-location illustration is a
cross-reference table identifying the items by reference
designations, their coordinate positions, and significant
military-type numbers or manufacture' part numbers.
Compared to the already described SIMM, newer
editions of the manual will show improvements in
REPAIR OF MECHANICAL ASSEMBLY
method of presentation, use of MDC, and size.
Mechanical assemblies, gear trains, and so on, are
Instead of the blocked text, the improved manuals
use a keyed text method of presentation in which the text
illustrated to the extent necessary to assure sufficient
data for repair. When assemblies are illustrated in
material is arranged in tabular format and keyed to the
exploded form, index numbers are cross-referenced to
diagram by circled numbers, as shown by figure 4-8.
contractors' drawing numbers or to contractors'
This method permits significantly more text material to
vendors' part numbers. Subassemblies, such as synchro
be presented than the blocked text method. Besides
motors, that frequently are identified by nonreadily
being used with the schematic diagrams, the keyed text
is also used with the precise-access block diagrams
translatable military-type numbers also include