Figure 4-8.-SIMM keyed text.

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

IMPROVEMENTS

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

4-9