TM 55-1520-240-T
8-93
TRANSMISSION OIL PRESSURE INDICATING AND WARNING SYSTEM OPERATIONAL CHECK (Continued)
8-9.3
TASK
RESULT
16.
Disconnect plug from forward transmission
FWD TRANSMISSION MAIN OIL PRESS light (7) shall
main oil pressure switch (8).
go out. If it is still on, go to task 8-9.12.
17.
Disconnect plug from aft transmission main oil
AFT TRANSMISSION MAIN OIL PRESS light (7) shall
pressure switch (9).
go out. If it is still on, go to task 8-9.12.
18.
Disconnect plug from combining transmission
COMB TRANSMISSION MAIN OIL PRESS light (7)
main oil pressure switch (10).
shall go out. If it is still on, go to task 8-9.12.
19.
Disconnect plug from No. 1 (left) engine trans-
LEFT TRANSMISSION MAIN OIL PRESS light (7) shall
mission oil pressure switch (11).
go out. If it is still on, go to task 8-9.12.
20.
Disconnect plug from No. 2 (right) engine trans-
RIGHT TRANSMISSION MAIN OIL PRESS light (7)
mission oil pressure switch (11).
shall go out. If it is still on, go to task 8-9.12.
21.
Disconnect plug from aft shaft oil pressure
AFT SHAFT MAIN OIL PRESS light (7) shall go out.
switch (12).
If it is still on, go to task 8-9.12. XMSN oil press
capsule (6) shall go out. If it is still on, go to
task 8-9.13.
22.
Short pin 2 in aft shaft oil pressure switch (12)
XMSN OIL PRESS capsule (6) shall come on. AFT
plug to ground with a wire.
SHAFT MAIN OIL PRESS light (7) shall come on. If
capsule (6) does not come on, go to task 8-9.14.
23.
Remove wire.
Capsule (6) and light (7) shall go out.
24.
Short pin 2 in No. 2 engine (right) transmission
XMSN OIL PRESS capsule (6) shall come on. RIGHT
oil pressure switch (11) plug to ground with a
TRANSMISSION MAIN OIL PRESS light (7) shall
wire.
come on. If capsule (6) does not come on, go to
task 8-9.14.
25.
Remove wire.
Capsule (6) and light (7) shall go out.
26.
Short pin 2 in No. 1 engine (left) transmission
XMSN OIL PRESS capsule (6) shall come on. LEFT
oil pressure switch (11) plug to ground with a
TRANSMISSION MAIN OIL PRESS light (7) shall
wire.
come on. If capsule (6) does not come on, go to
task 8-9.14.
27.
Remove wire.
Capsule (6) and light (7) shall go out.
28.
Short pin 2 in combining transmission main oil
XMSN OIL PRESS capsule (6) shall come on. COMB
pressure switch (10) plug to ground with a wire.
TRANSMISSION MAIN OIL PRESS light (7) shall
come on. If capsule (6) does not come on, go to
task 8-9.14.
29.
Remove wire.
Capsule (6) and light (7) shall go out.
TASK
RESULT
30.
Short pin 2 in aft transmission main oil pressure
XMSN OIL PRESS capsule (6) shall come on. AFT
switch (9) plug to ground with a wire.
TRANSMISSION MAIN OIL PRESS light (7) shall
come on. If capsule (6) does not come on, go to
task 8-9.14.
31.
Remove wire.
Capsule (6) and light (7) shall go out.
32.
Short pin 2 in forward transmission main oil
XMSN OIL PRESS capsule (6) shall come on. FWD
pressure switch (8) plug to ground with a wire.
TRANSMISSION MAIN OIL PRESS light (7) shall
come on. If capsule (6) does not come on, go to
task 8-9.14.
33.
Remove wire.
Capsule (6) and light (7) shall go out.
34.
Press and release each TRANSMISSION MAIN
Each light (7) shall come on when pressed. If it does
OIL PRESS light (7).
not, go to task 8-9.15.
35.
Connect plugs to forward, aft, combining, No. 1
XMSN OIL PRESS capsule (6) shall come on. FWD,
(left) and No. 2 (right) engine transmission pres-
COMB, AFT, LEFT, RIGHT, and AFT SHAFT TRANS-
sure switches (8, 9, 10, and 11) and aft shaft
MISSION MAIN OIL PRESS lights (7) shall come on.
pressure switch (12).
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8-160 Change 4
