ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
4-1-3.
Testing (Both Models).
a.
Set multimeter for ohms and check brush assembly (Figure 4-2) for continuity between mount A and
brush B, and mount C and brush D. Check for open circuits between mount A and mount C, mount
A and brush D, mount C and brush B, and brush B and brush D. Replace brush assembly if
indications are other than stated.
Figure 4-2. Brush Test
b.
Set multimeter for ohms and check diode-trio assembly (Figure 4-3) by noting multimeter indications
between each point A and B. Reverse multimeter leads, repeat checks and note indications. If
readings are the same in both directions for any diode, replace entire diode-trio assembly. A good
diode will show a high indication in one direction and a low indication in the other.
Model 8EM3005CA
Model 8MR3005CA
Figure 4-3. Diode-Trio Test
c. Set multimeter for ohms and check rectifier bridge assembly (Figure 4-4) by noting multimeter
indications between point A and each point C, and between point B and each point C. Reverse leads,
repeat checks and note indications. If readings are the same in both directions for any diode, replace
entire rectifier bridge assembly. A good diode will have a high indication in one direction and a low
indication in the other.
Change 4 4-3
