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• UNIT MAINTENANCE MANUAL VOLUME 3 OF 3 HYDRAULIC TROUBLESHOOTING TEST PROCEDURES ARMORED COMBAT EARTHMOVER (ACE), M9
• UNIT MAINTENANCE MANUAL ARMORED COMBAT EARTHMOVER (ACE), M9 is changed as follows
• UNIT MAINTENANCE MANUAL ARMORED COMBAT EARTHMOVER (ACE), M9 is changed as follows
• LIST OF EFFECTIVE PAGES/WORK PACKAGES
• WARNING
• WARNING-continued
• WARNING-continued
• TABLE OF CONTENTS
• HOW TO USE THIS MANUAL
• USING YOUR MANUAL: AN EXAMPLE
• USING YOUR MANUAL: AN EXAMPLE-continued
• USING YOUR MANUAL: AN EXAMPLE-continued
• LIST OF PROCEDURES
• CHAPTER 1. INTRODUCTION
• SECTION II. EQUIPMENT DESCRIPTION
• LOCATION AND DESCRIPTION OF MAJOR COMPONENTS
• LOCATION AND DESCRIPTION OF MAJOR COMPONENTS-continued
• SAFETY, CARE, AND HANDLING
• CHAPTER 2. HYDRAULIC SYSTEM
• HYDRAULIC HIGH-PRESSURE FILTERS
• HYDRAULIC SUSPENSION OPERATION
• HYDRAULIC CONTROL VALVE OPERATION
• BILGE PUMP CONTROL VALVE
• Section II. GENERAL HYDRAULIC SYSTEM REPAIR METHODS
• GENERAL HYDRAULIC SYSTEM REPAIR-continued
• GENERAL HYDRAULIC SYSTEM REPAIR-continued
• GENERAL HYDRAULIC SYSTEM REPAIR-continued
• GENERAL HYDRAULIC SYSTEM REPAIR-continued
• INSTALLATION OF ADJUSTABLE FITTINGS
• CHAPTER 3. TROUBLESHOOTING
• GENERAL NOTES
• PRELIMINARY TROUBLESHOOTING PROCEDURES
• Packing (O-rings)
• PRELIMINARY TROUBLESHOOTING PROCEDURES-continued
• SUSPENDING THE M9 FOR SUSPENSION SYSTEM CHECKS
• RELIEVING HYDRAULIC SYSTEM PRESSURE
• ACCUMULATOR DUMP VALVE INSTALLATION
• ACCUMULATOR DUMP VALVE INSTALLATION-continued
• GENERAL SUSPENSION TROUBLESHOOTING INFORMATION
• ACTUATOR PORT INDENTIFICATION AND DESCRIPTION
• TYPICAL NO. 1 AND 4 ACTUATOR SCHEMATIC DIAGRAM
• LOCKING AND DISABLING EJECTOR
• Section II. TROUBLESHOOTING PROCEDURES
• SYMPTOM INDEX
• ALL HYDRAULIC FUNCTIONS INOPERATIVE
• HYDRAULIC CONTROLS SCHEMATIC
• ALL HYDRAULIC FUNCTIONS INOPERATIVE-continued
• OIL FLOW TEST
• ALL HYDRAULIC FUNCTIONS INOPERATIVE-continued
• MAIN PUMP SUCTION HOSE CHECK
• ALL HYDRAULIC FUNCTIONS INOPERATIVE-continued
• MAIN HYDRAULIC PUMP TEST
• ALL HYDRAULIC FUNCTIONS INOPERATIVE-continued
• YDRAULIC PRESSURE AT PORT 13R CHECK
• ALL HYDRAULIC FUNCTIONS INOPERATIVE-continued
• HYDRAULIC PRESSURE AT PORT 13L CHECK
• APRON, BILGE PUMP, AND LEFT-HAND WHEEL CONTROL INOPERATIVE
• APRON, BILGE PUMP, AND LEFT-HAND WHEEL CONTROL CIRCUIT
• APRON, BILGE PUMP, AND LEFT-HAND WHEEL CONTROL INOPERATIVE-continued
• 13R MAIN RELIEF VALVE ADJUSTMENT
• APRON, BILGE PUMP, AND LEFT-HAND WHEEL CONTROL INOPERATIVE-continued
• MAIN HYDRAULIC PUMP PRESSURE TEST
• APRON WILL NOT RAISE
• APRON HYDRAULIC SCHEMATIC
• APRON WILL NOT RAISE-continued
• APRON CONTROL VALVE PRESSURE TEST
• APRON WILL NOT RAISE-continued
• APRON CYLINDERS OPERATION CHECK
• APRON WILL NOT RAISE-continued
• APRON CYLINDER LEAKAGE TEST
• BUMP STOPS INOPERATIVE
• BUMP STOP SCHEMATIC
• BUMP STOPS INOPERATIVE-continued
• VISUAL INSPECTION
• BUMP STOPS INOPERATIVE-continued
• BUMP STOP CIRCUIT TEST
• BUMP STOPS INOPERATIVE-continued
• BUMP STOP CYLINDER LEAKAGE TEST
• BUMP STOPS INOPERATIVE-continued
• FORWARD MANIFOLD PRESSURE TEST
• EJECTOR CREEPS
• EJECTOR HYDRAULIC SCHEMATIC
• EJECTOR CREEPS-continued
• EJECTOR CONTROL VALVE LINKAGE CHECK
• EJECTOR CREEPS-continued
• EJECTOR CONTROL VALVE LEAKAGE TEST
• EJECTOR CREEPS-continued
• EJECTOR RELIEF VALVE TEST
• EJECTOR CREEPS-continued
• EJECTOR CYLINDER INTERNAL LEAKAGE TEST
• EJECTOR DOES NOT EXTEND OR RETRACT
• EJECTOR HYDRAULIC SCHEMATIC
• EJECTOR DOES NOT EXTEND OR RETRACT-continued
• MECHANICAL BINDING CHECK
• EJECTOR DOES NOT EXTEND OR RETRACT-continued
• SUCTION STRAINER CHECK
• EJECTOR DOES NOT EXTEND OR RETRACT
• MAIN RELIEF VALVE PRESSURE CHECK
• EJECTOR DOES NOT EXTEND OR RETRACT-continued
• MAIN RELIEF VALVE ADJUSTMENT
• EJECTOR DOES NOT EXTEND OR RETRACT-continued
• MAIN HYDRAULIC PUMP PRESSURE TEST
• EJECTOR DOES NOT EXTEND OR RETRACT-continued
• Schematic Drawing
• EJECTOR DOES NOT EXTEND OR RETRACT-continued
• EJECTOR CIRCUIT PRESSURE CHECK
• EJECTOR DOES NOT EXTEND OR RETRACT-continued
• EJECTOR CIRCUIT PRESSURE CHECK
• EJECTOR DOES NOT EXTEND OR RETRACT-continued
• EJECTOR CONTROL VALVE ADJUSTMENT
• EJECTOR DOES NOT EXTEND OR RETRACT-continued
• EJECTOR CYLINDER LEAKAGE TEST
• FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE
• FRONT SUSPENSION RAISE/LOWER SCHEMATIC
• FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• SYSTEM PRESSURE TEST
• FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• CONTROL SPRUNG/UNSPRUNG VALVE LINKAGE CHECK
• FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• SPRUNG/UNSPRUNG LINKAGE ADJUSTMENT
• FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• CONTROL VALVE PRESSURE TEST
• FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE
• MAIN RELIEF VALVE PRESSURE TEST
• FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• MAIN PUMP FLOW TEST
• FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• SUSPENSION CONTROL VALVE PRESSURE TEST
• FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• NO. 1 ACTUATOR PRESSURE TEST
• FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• CIRCUIT 11 HOSES AND LINES BLOCKAGE CHECK
• FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE
• MAIN PUMP SUCTION HOSE BLOCKAGE CHECK
• FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• MAIN RELIEF VALVE ADJUSTMENT
• FRONT CORNER (LEFT OR RIGHT) RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• MAIN HYDRAULIC PUMP TEST
• FRONT CORNER (LEFT OR RIGHT) RAISES IN UNSPRUNG, BUT NOT SPRUNG MODE
• FRONT SUSPENSION RAISE/LOWER SCHEMATIC
• FRONT CORNER (LEFT OR RIGHT) RAISES IN UNSPRUNG, BUT NOT SPRUNG MODE-continued
• NO. 1 ACTUATOR OIL FLOW AND HYDRAULIC PRESSURE TEST
• FRONT CORNER (LEFT OR RIGHT) RAISES IN UNSPRUNG, BUT NOT SPRUNG MODE-continued
• RAISE FRONT CORNER TEST
• FRONT CORNER (LEFT OR RIGHT) RAISES IN UNSPRUNG, BUT NOT SPRUNG MODE-continued
• SPRUNG/UNSPRUNG CONTROL VALVE LINKAGE CHECK
• FRONT CORNER (LEFT OR RIGHT) RAISES IN UNSPRUNG, BUT NOT SPRUNG MODE-continued
• SPRUNG/UNSPRUNG LINKAGE ADJUSTMENT
• FRONT CORNER (LEFT OR RIGHT) RAISES IN UNSPRUNG, BUT NOT SPRUNG MODE-continued
• FORWARD MANIFOLD PRESSURE TEST
• FRONT CORNER (LEFT OR RIGHT) RAISES IN UNSPRUNG, BUT NOT SPRUNG MODE-continued
• Schematic Drawing
• FRONT CORNER (LEFT OR RIGHT) DOES NOT RAISE IN SPRUNG OR UNSPRUNG MODE
• FRONT SUSPENSION RAISE/LOWER SCHEMATIC
• FRONT CORNER (LEFT OR RIGHT) DOES NOT RAISE IN SPRUNG OR UNSPRUNG MODE-continued
• FRONT ACTUATOR PORT 9 PRESSURE TEST
• FRONT CORNER (LEFT OR RIGHT) DOES NOT RAISE IN SPRUNG OR UNSPRUNG MODE-continued
• NO. 1 ACTUATOR LEAKAGE CHECK
• FRONT CORNER (LEFT OR RIGHT) DOES NOT RAISE IN SPRUNG OR UNSPRUNG MODE-continued
• Notify Direct Support maintenance
• HYDRAULIC OIL OVERHEATS
• HYDRAULIC FLOW SCHEMATIC
• HYDRAULIC OIL OVERHEATS-continued
• OVERHEATED HOSES CHECK
• HYDRAULIC OIL OVERHEATS-continued
• CASE DRAIN LEAKAGE TEST
• HYDRAULIC OIL OVERHEATS-continued
• SUSPENSION RELIEF VALVE PRESSURE TEST
• HYDRAULIC OIL OVERHEATS-continued
• MAIN HYDRAULIC PUMP PRESSURE TEST
• HYDRAULIC OIL OVERHEATS-continued
• MAIN RELIEF VALVE TEST
• HYDRAULIC OIL OVERHEATS-continued
• SUSPENSION RAISE/LOWER RELIEF VALVE TEST
• HYDRAULIC OIL OVERHEATS-continued
• EJECTOR RELIEF VALVE TEST
• HYDRAULIC OIL OVERHEATS-continued
• EJECTOR CYLINDER INTERNAL LEAKAGE TEST
• HYDRAULIC OIL OVERHEATS-continued
• APRON RELIEF VALVE PRESSURE TEST
• HYDRAULIC OIL OVERHEATS-continued
• APRON CYLINDER LEAKAGE TEST
• HYDRAULIC OIL OVERHEATS-continued
• MAIN HYDRAULIC ACCUMULATOR PRESSURE TEST
• HYDRAULIC OIL OVERHEATS-continued
• MAIN ACCUMULATOR CHARGING
• HYDRAULIC OIL OVERHEATS-continued
• CASE DRAIN LEAKAGE TEST
• HYDRAULIC OIL OVERHEATS-continued
• SUSPENSION RELIEF VALVE PRESSURE TEST
• HYDRAULIC OIL OVERHEATS-continued
• SUSPENSION RELIEF VALVE ADJUSTMENT
• HYDRAULIC OIL OVERHEATS-continued
• SUSPENSION RAISE/LOWER RELIEF VALVE TEST
• HYDRAULIC OIL OVERHEATS-continued
• ACTUATOR INTERNAL LEAKAGE TEST
• HYDRAULIC OIL OVERHEATS-continued
• ACTUATOR ACCUMULATOR PRESSURE TEST
• HYDRAULIC OIL OVERHEATS-continued
• ACTUATOR ACCUMULATOR CHARGING
• LEFT REAR CORNER DOES NOT RAISE IN SPRUNG OR UNSPRUNG MODE
• SUSPENSION SCHEMATIC
• LEFT REAR CORNER DOES NOT RAISE IN SPRUNG OR UNSPRUNG MODE-continued
• HOSE 9 FLOW TEST
• LEFT REAR CORNER DOES NOT RAISE IN SPRUNG OR UNSPRUNG MODE-continued
• NO. 3 LEFT ACTUATOR INTERNAL LEAKAGE TEST
• REAR OF VEHICLE RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE
• SUSPENSION SCHEMATIC
• REAR OF VEHICLE RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• PORT 8 CHECK VALVE FLOW TEST
• REAR OF VEHICLE RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• ACTUATOR HOSE 9 FLOW TEST
• REAR OF VEHICLE RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• SPRUNG/UNSPRUNG CONTROL VALVE LINKAGE CHECK
• REAR OF VEHICLE RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• SPRUNG/UNSPRUNG LINKAGE ADJUSTMENT
• REAR OF VEHICLE RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• LEFT MANIFOLD BLOCKAGE TEST
• RIGHT REAR CORNER RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE
• SUSPENSION SCHEMATIC
• RIGHT REAR CORNER RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE-continued
• CROSSOVER TUBE FLOW TEST
• RIGHT REAR CORNER RAISES UNSPRUNG, BUT NOT SPRUNG MODE
• REAR SUSPENSION RAISE/LOWER SCHEMATIC
• RIGHT REAR CORNER RAISES IN UNSPRUNG, BUT NOT SPRUNG MODE-continued
• OIL FLOW TEST
• RIGHT REAR CORNER RAISES IN UNSPRUNG, BUT NOT SPRUNG MODE-continued
• CHECK LEVELING VALVE CAM ADJUSTMENT
• VEHICLE DOES NOT RESPOND TO DRIVER CONTROLS
• DRIVER CONTROL SCHEMATIC
• VEHICLE DOES NOT RESPOND TO DRIVER CONTROLS-continued
• OIL FLOW TEST
• VEHICLE DOES NOT RESPOND TO DRIVER CONTROLS-continued
• MAIN HYDRAULIC PUMP PRESSURE TEST
• VEHICLE DOES NOT RESPOND TO DRIVER CONTROLS-continued
• FLOW FROM CONTROL VALVE TEST
• VEHICLE DOES NOT RESPOND TO DRIVER CONTROLS-continued
• MAIN RELIEF VALVE TEST
• WINCH AND RIGHT-HAND WHEEL CONTROL INOPERATIVE
• OUTBOARD HYDRAULIC VALVE BANK SCHEMATIC
• WINCH AND RIGHT-HAND WHEEL CONTROL INOPERATIVE-continued
• MAIN RELIEF VALVE TEST
• WINCH AND RIGHT-HAND WHEEL CONTROL INOPERATIVE-continued
• MAIN HYDRAULIC PUMP PRESSURE TEST
• WINCH WILL NOT PULL RATED LOAD
• WINCH HYDRAULIC SCHEMATIC
• WINCH WILL NOT PULL RATED LOAD-continued
• WINCH CONTROL VALVE HYDRAULIC PRESSURE CHECK
• WINCH WILL NOT PULL RATED LOAD-continued
• WINCH RELIEF VALVE VB ADJUSTMENT
• WINCH WILL NOT PULL RATED LOAD-continued
• WINCH MOTOR INTERNAL LEAKAGE TEST-continued
• WINCH WILL NOT PULL RATED LOAD-continued
• SHIFT LINKAGE ADJUSTMENT CHECK
• WINCH WILL NOT PULL RATED LOAD-continued
• HIGH/LOW LINKAGE WINCH ADJUSTMENT
• WINCH WILL NOT PULL RATED LOAD-continued
• WINCH WILL NOT PULL RATED LOAD-continued
• TRACK (LEFT OR RIGHT) WILL NOT TIGHTEN OR LOOSEN, SEMI-AUTOMATIC TRACK ADJUSTER (NEW PRODUCTION)
• TRACK ADJUSTER HYDRAULIC SCHEMATIC
• TRACK (LEFT OR RIGHT) WILL NOT TIGHTEN OR LOOSEN, SEMI-AUTOMATIC TRACK ADJUSTER (NEW PRODUCTION)-continued
• SPOOL AND POPPET VALVE CHECKS
• TRACK (LEFT OR RIGHT) WILL NOT TIGHTEN OR LOOSEN, SEMI-AUTOMATIC TRACK ADJUSTER (NEW PRODUCTION)-continued
• HOSE BLOCKAGE TEST
• FRONT CORNER (LEFT OR RIGHT) DOES NOT RAISE OR LOWER IN UNSPRUNG MODE, SEMI-AUTOMATIC TRACK ADJUSTER (NEW PRODUCTION)
• TRACK ADJUSTER HYDRAULIC SCHEMATIC
• FRONT CORNER (LEFT OR RIGHT) DOES NOT RAISE OR LOWER IN UNSPRUNG MODE, SEMI-AUTOMATIC TRACK ADJUSTER (NEW PRODUCTION)-continued
• SPOOL AND POPPET VALVE CHECKS
• FRONT CORNER (LEFT OR RIGHT) DOES NOT RAISE OR LOWER IN UNSPRUNG MODE, SEMI-AUTOMATIC TRACK ADJUSTER (NEW PRODUCTION)-continued
• HOSE BLOCKAGE TEST
• LEFT OR RIGHT TRACK ADJUSTER WILL NOT EXTEND AFTER THE SUSPENSION CONTROL LEVERS ARE RETURNED TO NEUTRAL (NEW PRODUCTION)
• TRACK ADJUSTER HYDRAULIC SCHEMATIC
• LEFT OR RIGHT TRACK ADJUSTER WILL NOT EXTEND AFTER THE SUSPENSION CONTROL LEVERS ARE RETURNED TO NEUTRAL (NEW PRODUCTION)-continued
• SPOOL AND POPPET VALVE CHECKS
• LEFT OR RIGHT TRACK ADJUSTER WILL NOT EXTEND AFTER THE SUSPENSION CONTROL LEVERS ARE RETURNED TO NEUTRAL (NEW PRODUCTION)-continued
• OIL FLOW TEST
• APPENDIX A. REFERENCES
• TECHNICAL BULLETINS
• OTHER PUBLICATIONS
• APPENDIX B. SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT
• APPENDIX B. SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT-continued
• APPENDIX B. SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT-continued
• APPENDIX B. SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT-continued
• APPENDIX C. SPECIAL TOOLS, HYDRAULIC TROUBLESHOOTING PARTS KIT 5705562
• APPENDIX C. SPECIAL TOOLS, HYDRAULIC TROUBLESHOOTING PARTS KIT 5705562-continued
• APPENDIX D. TORQUE VALUE GUIDE FOR HYDRAULIC FITTINGS
• APPENDIX E. SCHEMATIC DIAGRAMS
• INDEX
• INDEX-continued
• INDEX-continued
• INDEX-continued
• INDEX-continued
• INDEX-continued
• INDEX-continued
• INDEX-continued
• INDEX-continued
• INDEX-continued
• HYDRAULIC SCHEMATIC
• THE METRIC SYSTEM AND EQUIVALENTS
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