TM-9-2320-334-13&P LHST Operator, Field and Parts Manual M1147A1 Trailer Download
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TM 9-2330-334-13&P  PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)  INCLUDING LUBRICATION INSTRUCTIONS - Continued 0052 00  0052 00-23 Change 1  After PMCS Procedures for Trailer - Continued  Table 7. Preventive Maintenance Checks and Services (PMCS) - After.  ITEM  NO.  INTERVAL MAN-  HOUR  ITEM TO BE  CHECKED  OR  SERVICED  CREWMEMBER  PROCEDURE  EQUIPMENT  NOT READY/  AVAILABLE  IF:  1 After Air Tanks 1. With trailer parked and towing  vehicle engine shut down, listen for  sound of air leaks around trailer air  tanks (1).  Air leak(s)  heard around  air tanks.  2. Open air tank drain valves (2)  and drain moisture (WP 0004 00,  Draining Air Tanks).