TM 55-1930-209-14&P-19 Table 7-2.  Preventive Maintenance Checks and Services for Compressed Air System (Continued) B - Before D - Daily Q -  Quarterly D - During W - Weekly S -  Semiannually A - After M - Monthly A -  Annually INTERVAL ITEM PROCEDURES EQUIPMENT ITEM TO BE CHECK FOR AND HAVE IS NOT READY/ NO. INSPECTED REPAIRED OR ADJUSTED AVAILABLE IF B   D   A   D  W  M   Q   S   A AS NECESSARY c. Check for loose, worn, or cracked Sockets loose, sockets which reduce wrench impact cracked or worn. power and may create a hazard for the operator. d. Inspect air hoses for damage or wear. Air hoses dam- Replace as required. aged or worn. e. Each day, before using wrench, pour one tablespoon of oil into air inlet (turbine or spindle grade oil with 100-150 Saybalt Universal Seconds viscosity - contains rust inhibitor). NOTE Oil is in the air inlet lubricator where hose is connected to assure constant supply of lubricant to the motor.  DO NOT put oil in the oil hole on the side of the wrench body. f. Check to be sure air inlet screen is clean and properly installed in hose adapter. WARNING DO NOT operate system without an operat- ing safety valve. WARNING When bleeding pressure from air compres- sor drain cock, ALWAYS use protective shield to protect eyes and face from flying particles.  Wear gloves, close buttons and collars and roll down sleeves on clothing. 7-16