TM 55-1520-240-23-7
8-73
TEST TRANSMISSION OIL TEMPERATURE SELECTOR SWITCH OR INDICATOR
(AVIM)
(Continued)
8-73
CAUTION LIGHT TEST
41.
Set selector switch knob (3) to SCAN.
42.
Adjust AFT decade (12), MIX decade (13), LEFT
decade (14), and RIGHT decade (15) to 700
ohms.
43.
Connect multimeter (1), set to RX1, between test
setup ground (16) and pin K of indicator (5).
44.
Adjust FWD decade (11) to 797.4 ohms.
45.
Continue to increase adjustment of FWD decade
(11). Check multimeter (1). Multimeter shall
indicate continuity when indicator (5) reads
127ºC to 133ºC. FWD decade setting shall be
greater than 2023.8 ohms. Multimeter shall
continue to indicate continuity to 150ºC on
indicator.
46.
Disconnect multimeter (1).
FAIL-SAFE CIRCUIT TEST (OPEN)
47.
Set selector switch knob (3) to SCAN.
48.
Adjust FWD decade (11), AFT decade (12), MIX
decade (13), LEFT decade (14), and RIGHT
decade (15) to 1200 ohms. Check indicator (5).
Indicator shall read 0ºC.
49.
Set FWD test switch (6) to OPEN. Check
indicator (5). Pointer of indicator shall move to
150ºC. Set FWD test switch to NORMAL. Pointer
of indicator shall return to 0ºC.
50.
Repeat step 49 at AFT test switch (7), MIX test
switch (8), LEFT test switch (9), and RIGHT test
switch (10). Then go to step 51.
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