Quantcast AERIAL LADDER HOIST CYLINDER LOCKING VALVES DO NOT RELEASE LADDER WHEN RAISE/LOWER CONTROL IS PLACED IN "LOWER" POSITION

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Page Title: AERIAL LADDER HOIST CYLINDER LOCKING VALVES DO NOT RELEASE LADDER WHEN RAISE/LOWER CONTROL IS PLACED IN "LOWER" POSITION
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LADDER INTERCOM DOES NOT FUNCTION PROPERLY
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TM-5-4210-233-14P-1 Twin Agent 4x4 Firefighting Truck Model No. CM-KFT-B Manual
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FLOW MINDER (GALLONS-PER-MINUTE) METER DOES NOT FUNCTION PROPERLY
TM 5-4210-233-14&P-1 4-2.  Unit Troubleshooting-Continued MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION ELECTRICAL SYSTEM - AERIAL CONTROL PANEL - Continued 14 AERIAL LADDER HOIST CYLINDER LOCKING VALVES DO NOT RELEASE LADDER WHEN RAISE/LOWER CONTROL IS PLACED IN "LOWER" POSITION - Continued Step 4.  Refer to "swivel assembly slip ring contact interrupted" troubleshooting procedure. Step 5.  Refer to "aerial +12 volts not present at aerial master buss" troubleshooting procedure. Step 6.  Check wiring for continuity. Replace wire (see para 4-9.4). 15 ELEVATION SLOW-DOWN VALVE DOES NOT ENGAGE WHEN LADDER REACHES 700 ELEVATION (Refer to Electrical Wiring Diagrams, Appendix H, Sheet 1 0 of 16). Step 1.  Check slow-down valve limit switch for proper operation. Adjust/replace slow-down valve limit switch (see para 4-197). Step 2.  Check solenoid valve for proper operation by applying 12V to coil. Repair/Replace valve (see para 4-9.4). Step 3.  Check aerial circuit breaker #5 for +12V. Replace breaker (see para 4-99). Step 4.  Check wiring for continuity. Replace wire (see para 4-9.4). Step 5.  Refer to "swivel assembly slip ring contact interrupted" troubleshooting procedure. Step 6.  Refer to "+12 volts not present at aerial master buss" troubleshooting procedure. 4-136

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