MIL-DTL-2036E
removing the enclosure from bulkhead or deck. Enclosure weight shall be transmitted to the ship's
structure and not be borne by the walls of the enclosure. Sway bracing shall be provided for any unit
which is susceptible to deflections of .5 inch (12.7mm) or more due to vibration or shock.
3.2.7.3 Spot facing. In the case of equipment intended for permanent installation and having mounting
feet of cast, uneven or rounded material, the material around the mounting bolt holes shall be spot faced
to accommodate washers and mounting bolts.
3.2.8 Access. Enclosures shall provide for convenient access to terminals and all working parts for the
purpose of installation, repair, and adjustment.
3.2.8.1 Access to nonrotating equipment. Access to wiring on the back of a panel shall be made
possible by providing a means of removal of the panel through access covers or doors on the front of the
enclosure. Access for replacement of parts shall be possible from the front of the enclosure without
disassembly of the cabinet or the removal of any permanently mounted subassembly or part.
3.2.8.1.1 Access for electronic equipment. For electronic equipment, access shall be from the front.
Each article of equipment, and each major subassembly forming a part thereof, shall provide for the
necessary access to its interior parts, terminals, and wiring for adjustments, required circuit checking, and
the removal and replacement of maintenance parts. Accessibility for testing and replacement does not
apply to parts located in nonrepairable subassemblies or assemblies. For routine servicing and
maintenance, unsoldering of wires, wire harnesses, parts, or subassemblies shall not be required in order
to gain access to terminals, soldered connections, mounting screws, and the like. Inspection windows
shall be provided where necessary. Sizes of openings, maximum reach guidelines, and allowable sizes
and weights of replaceable assemblies shall conform to limits established in MIL-STD-1472.
3.2.8.1.1.2 Connections. Connections to parts inside a removable container shall be arranged to permit
removal of the container without threading connection leads through the container.
3.2.8.1.1.3 Parts. Parts which are identified as replaceable parts shall not be mounted by means of
rivets, spot welding, or hard curing compounds. No unsoldering or soldering of connections shall be
necessary when the front panel, or any subchassis, is removed for maintenance purposes. Design shall
be such that where plug-in modules or assemblies are used, they can be easily inserted in the proper
location when correctly oriented without damage to equipment or parts being engaged.
3.2.8.1.1.4 Enclosures. Accessibility to chassis, assemblies, or parts contained within cabinets,
consoles, or other enclosures shall be provided from outside the basic equipment through the use of
access doors, by mounting such items on withdrawal slides, swinging doors, through cable extenders and
cable retractors, provisions for circuit card extenders which will allow part or module operation in the open
position, or other arrangements to permit adequate access for properly servicing the equipment.
Automatic or manually operated locks shall be provided to lock the chassis in the servicing position.
When withdrawal slides are used they shall be of guided sectional construction with tracks and rollers.
Complete removal and access for servicing of electronic equipment contained within cabinets, consoles,
or other enclosures shall be provided from either the front or rear of the equipment. Guide pins, or
locating pins, or the equivalent, shall be provided for mechanical alignment during mounting. Shipboard
equipment shall have complete access for maintenance and servicing from the front of the equipment.
3.2.8.1.1.5 Bolt-together racks and enclosures. For Navy ship and shore applications, when bolt-
together racks are required, fastening shall be provided to bolt adjacent racks together at the top with
external brackets and through the bottom of the rack to a base or foundation. Bottom mounting shall be
accessible from the front with minimum disassembly of internal parts or subassemblies.
3.2.8.1.1.6 Compatibility. Equipment shall be designed for optimum accessibility compatible with
operating, maintenance, electromagnetic compatibility, and enclosure requirements.
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