ARMY TM 9-6115-673-13&P
AIR FORCE TO 35C2-3-512-1
(6)
Remove bolts and spacers securing positive heat sinks to rear housing. Retain all insulators.
(7)
Lift positive heat sinks from rear housing. Ensure tie point insulators remain in place.
(8)
Remove screws with spacers securing negative heat sink to rear housing.
(9)
Using a suitable press and short hardwood dowel, remove defective diodes.
b. Testing.
(1)
Using multimeter set for ohms, connect multimeter leads to diode wire lugs. Note ohms indication on
multimeter.
(2)
Reverse multimeter leads on diode wire lugs. Note ohms indication on multimeter.
(3)
Resistance (ohms) readings should be high in one direction and low in the other. If readings are high
or low in both directions, diode is defective and must be replaced.
(4)
Repeat steps 1, 2, and 3 for each of the other diodes.
(5)
Inspect capacitors for evidence of overheating (burned wire/insulation).
(6)
Using multimeter set for ohms, connect multimeter leads to capacitor wire lugs. Note ohms indication
on multimeter.
(7)
Reverse multimeter leads on capacitor wire lugs. Note ohms indication on multimeter.
(8)
Resistance (ohms) readings should be high in one direction and low in the other. If readings are high
or low in both directions, capacitor is defective and must be replaced.
c. Installation.
(1)
Install new lugs on each diode clipped during removal. Ensure that leads are long enough to reach tie
points (Figure 5-48).
(2)
Using suitable press, install replacement diodes into heat sinks.
(3)
Install negative heat sink on outside of rear housing and secure with screws and spacers.
(4)
Install positive heat sinks in inside of rear housing and secure with bolts and spacers. Ensure that
negative diode leads are routed as tagged.
(5)
Install new brush holder with brushes by aligning holder to mounting holes with arm over tie point.
Ensure that lower brush lead is captured under right side mounting stud.
(6)
Secure brush holder with nuts and washers.
5-90
