ARMY TM 9-6115-672-14
AIR FORCE TO 35C2-3-444-32
MARINE CORPS TM 09244A/09245A-14
Remove nuts (1, Figure 5-11) and lockwashers (15) securing main rotor leads and rotating
rectifier diode leads to terminal bolts (2). Tag and remove leads.
Remove bolts (3) and washers (4) securing exciter rotor leads to rotating rectifier plate (13).
Tag and remove leads.
Remove bolts (18, Figure 5-9), lockwashers (19), and rotating rectifier (20) from rotor assembly
c. Replacement of Rotating Rectifier Diodes.
Shut down generator set, paragraph 2.11.2. (2) Open BATTERY ACCESS door (Figure 1-2),
and disconnect negative battery cable.
Remove rear housing panel. Refer to paragraph 4.7.5.
Remove end bell top cover and louvered covers. Refer to paragraph 5.10.2.
It will be necessary to bar (turn) engine in order to position a specific area of the rotating rectifier
at one of the end bell access holes. Use center bolt on harmonic balancer to turn engine. Refer to
Unsolder electrical lead from diode (7, Figure 5-11) to be removed.
Remove nut (5), lockwasher (6), and diode (7) from rotating rectifier plate (13) through access
hole in end bell.
Run bead of thermal-electrical contact compound (Item 9, Appendix E) around base of diode (7)
prior to installing. Do not coat threads.
Insert diode (7) through generator end bell access hole, and install on rotating rectifier plate (13)
with lockwasher (6) and nut (5). Torque nut to 28-30 inch-pounds (3.16-3.38 Nm).
Using soldering iron and solder (Item 19, Appendix E), solder electrical lead to diode (7).
(10) Install end bell top cover and louvered covers. Refer to paragraph 5.10.2.
(11) Install rear housing panel. Refer to paragraph 4.7.5.
(12) Connect negative battery cable to battery, and close BATTERY ACCESS door.
Install rotating rectifier (20, Figure 5-9), lockwashers (19), and bolts (18) on rotor assembly
Install exciter rotor leads, washers (4, Figure 5-11), and bolts (3) on rotating rectifier plate (13).
Install main rotor leads and rotating rectifier diode leads, lockwashers (15), and nuts (1) on
terminal bolts (2).
Install end bell and main bearing, paragraph 5.10.2.