TM 1-1520-238-T-5
7–71
7–15.
PRI HYD PSI INDICATOR – IS LIGHTED
7–15
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Service Unit,
E159-1000
Hydraulic Fluid
Personnel Required:
68X
Armament/Electrical Systems Repairer (2)
References:
TM 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Hydraulic system
leak check –
completed
WARNING
Turn off power before detaching or
attaching wires and connectors. High
current 28 VDC or 115 VAC is present.
Failure to do so could result in death or
serious injury.
1. Detach P18.
Is PRI HYD PSI indicator lighted?
YES
Replace pilot caution/warning
panel (TM 1-1520-238-23).
NO
Go to step 2.
2. Detach P19 and P239. Check for short between:
P18–71 and ground,
P18–121 and ground.
Does short exist?
YES
Repair shorted wire between:
P18–121 and P19–71,
P18–71 and P914–B4,
J914–B4 and P239–2.
Go to paragraph 7–10.
NO
Go to step 3.
3. Remove primary hydraulic manifold
low pressure switch (TM 1-1520-238-23). Check
for short between (HP1)J6–2 and chassis
ground.
Does short exist?
YES
Replace primary hydraulic
manifold (TM 1-1520-238-23).
NO
Replace primary hydraulic low
pressure switch
(TM 1-1520-238-23).
END OF TASK
