TM 1-1520-238-T-4
6–125
6–55.
OIL PSI MAIN XMSN 2 INDICATOR – IS LIGHTED WHEN HOD DISPLAYS NORMAL
6–55
XMN 2 OIL PRESSURE (cont)
5. Remove oil system 2 heat exchanger pressure
transducer (TM 1-1520-238-23). Install pressure
gage. Start engine 1 and place PWR lever to
FLY (TM 1-1520-238-CL). Operate until readings
stabilize.
Does oil pressure gage read above 28 LBS
on pressure gage?
YES
Go to step 6.
NO
Replace system 2 main
transmission pump
(TM 1-1520-238-23).
6. Check for open between:
P672–95 and P672–94,
P672–95 and P672–98,
P672–95 and P672–109.
Does open exist?
YES
Go to step 8.
NO
Go to step 7.
7. Check for short between:
P673–94 and ground,
P673–95 and ground,
P673–98 and ground,
P673–109 and ground.
Does short exist?
YES
Go to step 9.
NO
Refer to TM 9-1230-476-20-2 to
troubleshoot multiplex
subsystem.
8. Check for open between:
P578–1 and P578–2,
P578–1 and P578–3.
Does open exist?
YES
Replace oil system 2 heat
exchanger pressure transducer
(TM 1-1520-238-23).
NO
Repair open wire between:
P672–95 and J578–1,
P672–109 and J578–2,
P672–98 and J578–3,
P672–94 and J578–3.
Go to paragraph 6–13.
9. Check for short between:
P578–1 and ground,
P578–2 and ground,
P578–3 and ground.
Does short exist?
YES
Replace oil system 2 heat
exchanger pressure transducer
(TM 1-1520-238-23).
NO
Repair shorted wire between:
P672–94 and J578–3,
P672–95 and J578–1,
P672–98 and J578–3,
P672–109 and J578–2.
Go to paragraph 6–13.
END OF TASK
