ARMY TM 9-6115-673-13&P
AIR FORCE TO 35C2-3-512-1
(4) Connect electrical leads for ON-OFF load circuit breaker assembly to TB1-2 and
TB1-7 (MEP-531A) and remove tags.
(5) Close and secure instrument panel.
FLYWHEEL DIODE ASSEMBLY.
a.
Inspection.
(1) Shut down generator set.
(2) Release instrument panel by turning fastener, open instrument panel slowly.
(3) Visually inspect diode assembly for cracked or deteriorated insulation, broken
terminals, and other damage.
(4) Close and secure instrument panel.
b.
Testing.
(1) Shut down generator set.
(2) Release instrument panel by turning fastener, open instrument panel slowly.
(3) Disconnect one end of flywheel diode assembly (CR1) at S2-S. Using multimeter
set for ohms, test across disconnected end of CR1 to TB1-1. Then reverse leads
and test again.
(4) Resistance (ohms) readings should be high in one direction and low in the other
direction. If readings are high or low in both directions, diode is defective and must
be replaced.
(5) Reconnect lead to S2-S.
c.
Removal.
(1) Shut down generator set.
(2) Release instrument panel by turning fastener, open instrument panel slowly.
(3) Remove EMI filter, refer to paragraph 4.47.b (MEP-531A)
(4) Tag and disconnect flywheel diode assembly (Figure 4-41) at terminal board (TB1-
1) and at START-PREHEAT/PREHEAT/OFF/START rotary switch (S2-S).
d.
Repair. Repair flywheel diode assembly by assembling the flywheel diode assembly and
terminals in accordance with Appendix G, Figure G-3.
