TB 11-6115-741-24
4.3 Main Generator
4.3.1 The AC generator assembly shall be removed from the generator set, disassembled and cleaned
(steam cleaning is the preferred cleaning method) to remove the loose and caked dust from all the
windings. If liquids are used to clean alternator, alternator must be dried in an oven or via other industrial
process to remove all the liquid from the windings prior to reassembly. Perform Insulation Resistance test
in accordance with Mil-Std-202, Method 302, Test Condition B, ≥ 200MΩ. Alternator components shall
be inspected, tested, and repaired or replaced, as necessary. Damaged windings shall be rewound or
replaced. Rotor bearing (s) and any o-ring shall be replaced. Diodes shall be tested and replaced as
required. Windings shall be reinsulated. Rotor shall be rebalanced if required. Ensure that the rotor
wiring is properly routed and secured to prevent stator contact.
4.3.2 The exterior surface of the AC generator assembly does not require repainting, except the MEP-
002/-003A, MEP-016 Series, MEP-531/501, and MEP-903 assemblies shall be painted.
4.3.3 On the MEP-531A, replace the brushes, caps, and holders IAW the TM and polish the slip rings.
4.3.4 On the 15, 30, and 60 KW TQG's, the two generator mounting bolts shall be replaced, NSN 5305-
00-724-7265.
4.4 DC Electrical System. The 12-volt batteries will be inspected for damage, hydrometer tested, filled
with fluid, recharged, and load or conductance tested. Batteries will be replaced if required, or if
adequate testing equipment is not available. Cables, terminal/battery covers, and terminal lugs shall be
replaced on an as required basis. Recondition or replace battery tray and hold down assemblies as
necessary.
MEP-016 Series, MEP-531/501, and MEP-903, the complete generator set including all subassemblies
shall be painted. Sound absorbing foam panels shall be replaced as required with cut-to-size replacement
foam and installed using pin-rivets through the foam. The generator set housing shall have a final topcoat
of CARC paint in accordance with MIL-DTL-53072, color/pattern as specified by CECOM.
4.6.1 On the 3 kW, 5 kW, or 10 kW, ASKs may be removed from the generators and the generators will
function normally. For 5 & 10 kW generators new replacement kits may still be available from the
supply system for purchase and installation if the owning unit wants to retain the reduced acoustic
signature provided by the kits.
4.6.2 On the 15 kW and 30 kW generators the exterior generator panels were removed to install the
ASKs. The ASK panels reduce the generators acoustic signature and protect generator set components
from environment elements. If 15 and 30 kW ASK panels/doors have failed, replacement ASK
panels/doors must be installed or the complete kit must be removed and original generator panels/doors
must be installed. Failure to enclose the 15 & 30 kW generators sets will lead to weather damage of
internal generator set components and potential overheating of the main alternator, engine, and other
generator components, as the exterior panels and doors duct cooling air through the generator
components.
4.6.3 Mil-Std generators have a short remaining life and repairs should proportionate to the expected life
of the generators. The preferred order of repair options is as follows:
