TM 1-1520-238-T-5
Change 6
7–99
7–23.
HYDRAULIC HAND PUMP – DOES NOT SERVICE UTILITY HYDRAULIC MANIFOLD
7–23
RESERVOIR
Tools:
Nomenclature
Part Number
Tool Kit, Aircraft
SC518099CLA01
Mechanic’s
Service Unit,
E159-1000
Hydraulic Fluid
Personnel Required:
67R
Attack Helicopter Repairer
References:
TM 1-1520-238-23
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. Operate hydraulic hand pump a minimum of ten
strokes.
Does binding or roughness occur?
YES
Go to step 4.
NO
Go to step 2.
2. Wrap clean rag around air relief valve on utility
hydraulic manifold reservoir.
Push air relief valve.
Is hydraulic fluid present?
YES
Replace utility hydraulic
manifold reservoir housing
(TM 1-1520-238-23).
NO
Go to step 3.
3. Using container to catch fluid, disconnect
overboard drain line from utility hydraulic
manifold reservoir. Operate hydraulic hand
pump.
Is hydraulic fluid present?
YES
Replace utility hydraulic
manifold (TM 1-1520-238-23).
NO
Replace hydraulic hand pump
(TM 1-1520-238-23).
4. Inspect hydraulic filter.
Is filter dirty or clogged?
YES
Replace hydraulic filter element
(ADG) or hydraulic filter screen
(ADF) (TM 1-1520-238-23).
NO
Replace hydraulic hand pump
(TM 1-1520-238-23).
END OF TASK
