TM 5-3805-261-34
CHARGING SYSTEM MAINTENANCE. (cont)
4-5.
Alternator (Bosch). (Sheet 8 of 12)
TESTING (cont)
8.
Test stator (28, Figure 4-31) for windings
continuity. Using ohmmeter, take three readings
between pairs of the three stator (28) wires.
Replace if readings are not 0.15 to 0.25 ohm.
9.
Test stator (28) for shorts to frame. Using
ohmmeter, touch one lead to stator (28) frame
and touch the other to each of the three stator
(28) wires. Readings should be very high. If not,
replace stator (28).
10. Perform minus diode test. Using ohmmeter,
connect test wire to frame (54) and the other
wire to each of the terminals on the diode
assembly (39) from where the three stator (28)
wires were disconnected. Then switch the test
wires from diode assembly (39) terminals to
frame (54). If one high and one low reading are
not obtained, replace diode assembly (39, Figure
4-25).
11. Perform positive diode test the same way as
minus diode test, except connect one lead to the
(B+) terminal (Figure 4-30). Results should be
the same.
12. Perform excitation diode test, connecting one
test wire to (D+) terminal.
CLEANING
Clean all parts. Refer to Chapter 2.
INSPECTION
Inspect all parts. Refer to Chapter 2.
Figure 4-31.
Figure 4-25
Figure 4-30.
Go to Sheet 9
4-30
