TM 55-1520-240-T CHAPTER 7 HYDRAULIC "AIRFRAME" SYSTEMS TROUBLESHOOTING CHAPTER OVERVIEW Chapter 7 contains procedures for Hydraulic "AIRFRAME" Systems troubleshooting.  Each hydraulic "AIRFRAME" system and its failure symptoms is listed below. Included in this chapter are locations and views of all electrical connectors, receptacles, relays, and ground connections for the Hydraulic Systems. Refer to TM 55-1520-240-23 for required maintenance procedures. SYSTEM PARA SYSTEM PARA FLIGHT CONTROL HYDRAULIC SYSTEM 7-1 ENGINE HYDRAULIC STARTING SYSTEM 7-7 UTILITY HYDRAULIC SYSTEM 7-2 APU HYDRAULIC STARTING SYSTEM 7-8 CARGO RAMP AND DOOR 7-3 INTEGRATED LOWER CONTROL ACTUATOR (ILCA) 7-9 SWIVEL LOCKS SYSTEM 7-4 HYDRAULIC HANDPUMP 7-10 POWER STEERING SYSTEM 7-5 WHEEL BRAKES SYSTEM 7-6 FAILURE SYMPTOM LIST FLIGHT CONTROL HYDRAULIC SYSTEM SYMPTOM TASK FLIGHT CONTROL NO. 1 PRESSURE OR RETURN FILTER CHANGE LIGHT IS ON 7-1.4 FLIGHT CONTROL NO. 2 PRESSURE OR RETURN FILTER CHANGE LIGHT IS ON 7-1.4 FLIGHT CONT RESERVOIR LEVEL INDICATOR POINTER DOES NOT MOVE WITH FLIGHT CONT SWITCH AT NO. 1 OR NO. 2 7-1.4 HYDRAULICS FLIGHT CONT CIRCUIT BREAKER WILL NOT STAY CLOSED 7-1.4 HYDRAULICS FLIGHT CONT NO. 1 TEMPERATURE INDICATOR POINTER EXCEEDS 95C 7-1.4 HYDRAULICS FLIGHT CONTROL NO. 2 TEMPERATURE INDI- CATOR POINTER EXCEEDS 95C 7-1.4 HYDRAULICS NO. 1 BLOWER CONT CIRCUIT BREAKER WILL NOT STAY CLOSED 7-1.4 HYDRAULIC NO. 2 BLOWER CIRCUIT BREAKER WILL NOT STAY CLOSED 7-1.4 SYMPTOM TASK ILCA JAM SENSOR BUTTON EXTENDED 7-1.4 INDICATING BUTTON ON FLIGHT CONTROL HYDRAULIC PRESSURE OR RETURN FILTER IS EXTENDED 7-1.4 NO. 1 HYD FLT CONTR CAPSULE (WITHOUT 74) OR HYD 1 (WITH 74) DOES NOT COME ON WHEN FLIGHT CONTROL SWITCH SET TO NO. 2 ON 7-1.4 NO. 1 HYDRAULIC COOLING BLOWER CIRCUIT BREAKER WILL NOT STAY CLOSED 7-1.4 NO. 1 HYD FLT CONTR (WITHOUT 74) OR HYD 1 (WITH 74) CAPSULE COMES ON WHEN NO. 2 SYSTEM DEPRES- SURIZED THEN SELECTED 7-1.4 NO. 1 OR NO. 2 HYD FLT CONTR (WITHOUT 74) OR HYD 1 OR HYD 2 (WITH 74) CAPSULE IS OUT WHEN SYSTEM NOT PRESSURIZED 7-1.4 SYMPTOM TASK NO. 1 OR NO. 2 PUMP FAULT LIGHT IS ON 7-1.4 NO. 1 OR NO. 2 PUMP FAULT OR FILTER CHANGE LIGHTS DO NOT COME ON WHEN PRESSED 7-1.4 NO. 2 HYD FLT CONTR (WITHOUT 74) OR HYD 2 (WITH 74) CAPSULE DOES NOT COME ON WHEN FLIGHT CONTROL SWITCH SET TO NO. 1 ON 7-1.4 NO. 2 HYDRAULIC COOLING BLOWER CIRCUIT BREAKER DOES NOT STAY CLOSED 7-1.4 NO. 2 HYD FLT CONTR (WITHOUT 74) OR HYD 2 (WITH 74) CAPSULE COMES ON WHEN NO. 1 SYSTEM DEPRES- SURIZED THEN SELECTED 7-1.4 PIVOTING OR SWIVELING SERVO CYLINDER JAM SENSOR BUTTON EXTENDED 7-1.4 Change 17  7-2.1