TM 1-1520-238-T-4
6–105
6–42.
OIL PSI ACC PUMP INDICATOR – LIGHTS (cont)
6–42
6. Check for short between P18–4 and P755–20.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 6–12.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot the pilot
caution/warning system.
7. Remove accessory oil pump pressure switch.
Install pressure gage (TM 1-1520-238-23).
Restart and run APU (TM 1-1520-238-23).
Is minimum 26 psi oil pressure present?
YES
Replace main transmission
accessory pump pressure
switch (TM 1-1520-238-23).
NO
Replace main transmission
accessory drive lube pump
(TM 1-1520-238-23).
END OF TASK
