TM 5-3895-379-23-1
0060
MALFUNCTION
Drum Select Switch Faulty.
CORRECTIVE ACTION
1.
Touch positive (+) probe of multimeter to terminal 4 (wire C926-BU).
2.
Touch negative (-) probe of multimeter to good ground.
3.
Pull drum select switch back to rear position to check rear vibratory circuit.
4.
Touch positive (+) probe of multimeter to terminal 6 (wire C927-PU).
5.
Touch negative (-) probe of multimeter to good ground.
6.
Push drum select switch forward to front position to check front vibratory circuit.
7.
Touch positive (+) probe of multimeter to terminal 6 (wire C927-PU), then to terminal 4
(wire C926 - BU) while drum select switch is in center position to check vibratory circuit to both
drums.
8.
Turn engine start switch to OFF position (TM 5-3895-379-10).
9.
Turn battery disconnect switch to OFF position (TM 5-3895-379-10).
a.
If 24 to 28 VDC are not measured at terminal 4 (wire C926-BU) while drum select switch is
pulled back to rear position, replace drum select switch (WP 0158).
b.
If 24 to 28 VDC are not measured at terminal 6 (wire C927-PU) while drum select switch is
pushed forward to front position, replace drum select switch (WP 0158).
c.
If 24 to 28 VDC are measured at terminal 4 and 6 while drum select switch is in center
position, replace drum select switch (WP 0158).
d.
If all voltage output checks at drum select switch are OK, notify supervisor.
PANEL
SCREW
ASSEMBLY
WIRE 103-YL
WASHER
WIRE C926-BU
TERMINAL 5
TERMINAL 4
SCREW
WASHER
WIRE C927-PL
DRUM
TERMINAL 6
SELECT
SWITCH
OPERATOR
STATION
T0205SWR
Figure 3. Drum Select Switch Wiring.
END OF WORK PACKAGE
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03/15/2011Rel(1.8)root(tswp)wpno(T00066)