ARMY TM 9-6115-644-24
AIR FORCE TO 35C2-3-446-12
MARINE CORPS TM 0924A/09246A-24/2
Install bolts (18), bellville washers (17), snubbing washers (16), washers (15) and nuts (14) securing generator
assembly to skid base. Torque nuts (14) to 210 ft-lbs (265 Nm).
Align scribe mark on generator drive disc and engine flywheel, and install bolts (8) and lockwashers (9)
securing generator drive disc to engine flywheel.
Install screen/cover (7) on generator case with screws (5), washers (6), lockwashers (4) and nuts (3).
Adjust nuts (20) on generator mount to obtain 0.5 in. Minimum clearance between ends of bolts (10)
and skid base.
Install generator set rear housing section, paragraph 2-18-4.
Install output box assembly, paragraph 4-8-2.
Connect negative battery cable and close battery access door.
Start generator set and check for proper operation.
4-18 ROTATING RECTIFIER DIODES.
Shut down generator set. Allow generator to cool to ambient temperature.
Open battery access door and disconnect negative battery cable.
Remove generator set housing rear panel, paragraph 2-18-1.
Remove generator end bell cover plates, paragraph 4-19-1, step d.
It will be necessary to bar (turn) engine in order to position a specific area of the ro-
tating rectifier at one of the end bell access holes. Use center bolt on harmonic
balancer to turn engine, refer to TM 9-2815-255-24.
Remove nuts (1, FIGURE 4-12) and lockwashers (2) from rotating rectifier terminals.
Tag and remove main rotor and diode leads from rotating rectifier terminals.
Tag exciter rotor leads and remove bolts (3), washers (4), and exciter rotor leads from rectifier mounting plate
Set multimeter for ohms and connect positive lead to one side and negative lead to other side of each diode (6).
Record multimeter reading for each diode.
Repeat step h, with multimeter leads reversed.
Resistance (ohms) readings should be low in one direction and high in reversed direction. If readings are high
or low in both directions, diode is defective and must be replaced.
Install diode and main rotor leads to rotating rectifier terminals with nuts (1) and lockwashers (2). Remove tags.
Install exciter rotor leads to rectifier mounting plate assemblies with washers (4) and bolts (3). Remove tags.
Install generator end bell cover plates, paragraph 4-19-2, step 1.
U.S. GOVERNMENT PRINTING OFFICE: 1997-554-024/60020