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TM 55-4920-412-13&P
Table 4-17. Troubleshooting Oil and XMSN Pressure Voltage Checks (A2) Board (AVIM).
Extender Board and Oil Pressure (A2) board
Switch
Voltmeter indications (vac)
Pin/Connections
Positions
Approx. readings expected
Oil Press NO 1 - 59
CAL/LO
1.178 vac
NO 2 - 43
CW and CCW
XMSN
-17
CAL/HI
0.5 vac
CW and CCW
NOR/HI
1.19 vac
CCW
NOR/LO
1.19 vac
CCW
Oil Press NO 1 - 53
CAL/LO
1.288 vac
NO 2 - 37
CW and CCW
XMSN
-11
CAL/HI
1.288 vac
CW and CCW
NOR/HI
1.288 vac
CW and CCW
NOR/LOW
1.288 vac
CW and CCW
Oil Press NO 1 - 54, 60
Ground Loop
NO 2 - 46,34
XMSN
-20, 8
Oil Press NO 1 - 55
All
6 vac
NO 2 - 39
Positions
XMSN
-13
Oil Press NO 1 - 51
All
55 vac
NO 2 - 35
Positions
XMSN
-9
Oil Press NO 1 - 49
CAL/LO
1.17 vac
NO 2 - 33
CW and CCW
XMSN
-7
CAL/HI
1.46 vac
CW and CCW
NOR/HI
1.46 vac
CW and CCW
NOR/LO
1.46 vac
CW and CCW
Oil Press
NO 1 - 61
NO 2 - 40
15vdc
XMSN
-19
Oil Press
NO 1 - 57
CAL/LO
14.3 vdc
NO 2 - 41
CW and CCW
XMSN
-15
CAL/LO
0 vdc
CW and CCW
NOR/HI
14.3 vdc
CW and CCW
NOR/LO
14.3 vdc
CW and CCW
Oil Press
NO 1 - 63
NO 2 - 45
CAL/LO
3.44 to 3.73 vac
XMSN
-21
CAL/HI
2.77 to 3.05 vac
NOTE - See figure 4-12 and FO-4. Voltage check using figure 4-10 connections
4-29
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