TM 1-1520-238-T-5 7–124 7–42. EMERGENCY HYDRAULIC PRESSURE INDICATOR – DOES NOT INDICATE 3000 PSI 7–42 Tools: Nomenclature Part Number Tool Kit, Electrical SC518099CLA06 Repairer’s Multimeter, Digital AN/PSM-45 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. Check for 28 VDC at P238–9. Is voltage present? YES Go to step 2. NO Repair open wire between (A402)TB2–9–J and P238–9, or replace (A402)TB2–9. Go to paragraph 7–21. 2. Check for open between P238–10 and ground. Does open exist? YES Repair open wire between P238–10 and GS630–C. Go to paragraph 7–21. NO Go to step 3. 3. Verify AGPU pressure for 3000 psi (TM 1-1520-238-23). Check for 4.2 VDC at P746–C and P746–D. Is voltage present? YES Replace emergency hydraulic pressure indicator (TM 1-1520-238-23). NO Go to step 4. 4. Check for open between: P746–C and P238–24, P746–D and P238–23. Does open exist? YES Repair open wire. Go to paragraph 7–21. NO Go to step 5. 5. Remove emergency hydraulic pressure transducer (TM 1-1520-238-23). Check for open between (HP2): J1–9 and J8–D, J1–10 and J8–C, J1–23 and J8–B, J1–24 and J8–A. Does open exist? YES Replace utility hydraulic manifold (TM 1-1520-238-23). NO Replace emergency hydraulic pressure transducer (TM 1-1520-238-23). END OF TASK