TM 1-1520-238-T-4
6–82
Change 5
6–16.3. HOD XMN 1 READING – DISPLAYS 49 LB OIL PRESSURE OR LESS (cont)
6–16.3
4. Remove transmission 1 oil pressure switch
(TM 1-1520-238-23). Install pressure gage
GGG76 in oil pressure switch port. Start engine
1 and place PWR lever to FLY
(TM 1-1520-238-CL). Operate until readings
stabilize.
Is XMSN 2 oil pressure 35 – 49 PSI on gage?
YES
Replace transmission 1 lube
pump. Remove gage GGG76
and reinstall transmission 1 oil
pressure switch
(TM 1-1520-238-CL).
Go to paragraph 6–13.
NO
<35 PSI – Replace transmission
(TM 1-1520-238-23).
Go to paragraph 6–13.
>49 PSI – Refer to Task 6–17.
NOTE
If XMSN 1 operating pressure was 28 PSI
or less and OIL PSI MAIN XMSN 1
indicator was not illuminated during
normal operation, troubleshoot
transmission 1 oil pressure switch.
END OF TASK
