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7–12. HYDRAULIC HAND PUMP – DOES NOT SERVICE PRIMARY HYDRAULIC MANIFOLD RESERVOIR | Up
TM-1-1520-238-T-5 Army Model AH-64 Helicopter (NSN
1520-01-106-9519) (EIC: RHA) Manual | Next
7–14. PRI HYD INDICATOR– DOES NOT INDICATE 3000 PSI (AGPU OPERATING) |
TM 1-1520-238-T-5
7–68
7–13.
PRI HYD PSI INDICATOR – IS NOT LIGHTED WITH NO PRIMARY HYDRAULIC SYSTEM
7–13
PRESSURE INDICATED
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
References:
TM 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions –
L200 panel removed
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. On primary hydraulic manifold, check for open
between (HP1):
J6–1 and J6–2.
Does open exist?
YES
Go to step 3.
NO
Go to step 2.
2. Check for open between:
P239–1 and GS430–E,
P239–2 and P18–71.
Does open exist?
YES
Repair open wire.
Go to paragraph 7–10.
NO
Replace pilot caution/warning
panel (TM 1-1520-238-23).
3. Remove primary hydraulic low pressure switch
(TM 1-1520-238-23).
Check for open wire between (HP1):
J6–1 and J1–A,
J6–2 and J1–C.
Does open 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
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