TM 10-4610-239-10 TM 08580B-10/1 Table 2-3.  Operator/Crew Preventive Maintenance Checks and Services (Unit) (Continued) B - Before D - During A - After H - Hourly Interval Interval Procedures: Equipment Is Item Item to be Check for and have repaired Not Ready/ No. B   D A W Inspected or adjusted as necessary Available If: 37 • • Circuit breakers Inspect for cracked or broken Any circuit breaker parts.  Before connecting is damaged or will generator set, check for free not move easily movement of handle. Inspect for signs of burning or arcing. 38 • • • Water testing Check for cracked or broken equipment: glass.  Check to see that all lab beaker, markings are readable.  Re- graduated cylin- place damaged items. der, solution indicator, ther- mometer CAUTION To avoid damaging rupture disc, do not overtighten the holddown screw.  Handtighten, then tighten 1/8 turn with wrench. 39 • Rupture disc Before operation make sure An intact rupture assembly an intact rupture disc is in disc is not in place place. • • Check for leaks around There is leakage rupture disc assembly around rupture disc seat. 40 • • Pulse dampener Inspect for broken, rusted, There is any dam- or missing mounting hard- age to weldment. ware.  Check for cracks on weldment.  Inspect for leaks. 41 • • High-pressure Inspect for rust.  Check for There is leakage relief valve leakage at base of relief at relief valve valve. union to pipe. 42 • In-line TDS monitor Inspect for damage.  Install Visual damage. on control panel. 43 Water meter Inspect for damage.  Ensure cover Visual damage. is closed when readings are not being taken. 2-30