TM 55-1930-209-14&P-19 Table 17-4.  Preventive Maintenance Checks and Services for Workboat, Lifesaving, and Firefighting 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 t. Check the Regulator Function. The regu- There is any mal- lator function should be checked monthly function in regula- and preferably after each use to verify tor. that performance is within specifications. The Portable Regulator Tester is used to measure the resistance and the flow of air through the regulator at the proper suction or positive pressure. Check the Main-Line and By-Pass Valves: 1) Operation of the main-line valve and by-pass valve is tested by putting on the device and operating it normally. Venting of pressure relief valves, or continuing flow of air through the reg- ulator when the user is not inhaling, indicates the regulator needs to be repaired. In addition, any unusual sounds such as whistling, chattering, clicking, or rattling means that the reg- ulator should be further checked. 2) Clean and sanitize the apparatus, inspect the entire unit, and record information on the inspection tag or check list. Store the unit. 6 Portable Firefighting Pump {Model PE-250) WARNING Do NOT operate pump in closed area with- out exhaust hose connected and routed safely to outside fresh air. Exhaust gases are hazardous to personnel. · a. Visually check pump assembly set for Class III leaks. deficiencies that could cause hazardous conditions for personnel and equipment. Notify bargemaster or shift leader of defi- ciencies which require corrective action. · b. Check fuel supply. Refuel as necessary with mixture of two cans of BIA- TC-W- Service oil (NSN 9150-00-117-8791) is blended with each 6 gal of 90 octane gasoline. 17-34