ARMY TM 9-6115-643-24
AIR FORCE TO 35C2-3-445-22
i .
Adjust nuts (14) to obtain 0.5 in. minimum clearance between ends of bolts (16) and skid base.
j .
Loosen bolts (19, FIGURE 3-1) and raise lower engine support brackets (22) to uppermost position Tighten bolts
(19). Remove wooden shims if used.
k.
Install generator set rear housing section, paragraph 2.18.4.
l .
Connect negative battery cable and close battery access door.
m.
Start generator set and check for proper operation
4.17 ROTATING RECTIFIER DIODES (MEP-804A).
4.17.1
Testing.
a.
Shut down generator set. Allow generator to cool to ambient temperature.
b.
Open battery access door and disconnect negative battery cable.
c.
Remove generator set housing rear panel, paragraph 2.18.1.
d.
Remove generator end bell paragraph 4.18.1.
e.
Tag main rotor leads (2, FIGURE 4-9). Remove screws (1) and main rotor leads (2) from diode mounting plate
assembly (5).
f .
Tag exciter rotor leads (4). Remove screws (3) and exciter rotor leads (4) from diode mounting plate assembly (5).
g.
Set multimeter for ohms and connect positive lead to one side and negative lead to other side of each diode (7).
Record multimeter reading for each diode.
h.
Repeat step g, with multimeter leads reversed.
i .
Resistance (ohms) readings should be front to back ratio of 1:10 or greater. If any reading is less than 1:10, diode
is defective and must be replaced.
j .
Install exciter leads (4) and main rotor leads (2) to diode mounting plate assembly (5) with screws (1) and (3). Re-
move tags.
k.
Install generator end bell, paragraph 4-18-2.
I .
Install generator set housing rear panel, paragraph 2.18.4.
m.
Connect negative battery cable and close battery access door
4 .1 7 . 2 R e m o v a l .
a.
Shut down generator set
b
Open battery access door and disconnect negative battery cable
c.
Remove generator set housing rear panel, paragraph 2.18.1.
d.
Remove generator end bell, paragraph 4-18-1.
e.
Remove rotating rectifier, paragraph 4-19-1.
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