Table 2-3.  Operator/Crew Preventive Maintenance Checks and Services (Unit) (Continued) B-Before D-During A-After W-Weekly Interval Procedures: For readiness reporting Item Item to be Check for and have repaired Equipment is not No. B D A W Inspected or adjusted as necessary ready/available if: 11 • • • Chemical feed Inspect container/rack, pails, cans equipment: plastic and tubes for cuts, cracks or holes. pails, tubes, strain- Inspect during operation for leaks ers and cans Inspect strainer for clogging. Pails are so damaged After operation, drain and that they will not hold clean pails, tubes, strainers chemicals. and cans. Tubes will not draw chemicals into the pumps. 12 • • • Chemical feed Inspect for loose mounting Any one of the pump nuts. four pumps will Inspect for cracked or broken not supply chemical fitting. to the purification Check oil level before oper- cycle. ation.  Add oil as necessary. Refer to LO 5-4610-215-12/ LI 08580B-12. Listen for unusual noises during operation. Notify unit maintenance to replace malfunctioning pump.  For sight glass location and oil filling instructions, see lubrication order LO 10- 4610-239-12/LI 08580B-12 13 • • • Chemical feed Check for loose mounting Motor will not operate. pump motor nuts and bolts. Look for loose wires at conduit box. Listen for unusual noises during operation. Notify unit maintenance to replace malfunctioning motor. 14 • • • Chemical feed Inspect for broken or missing Valves will not pump priming pipe nipples. prime chemical valves Check for free operation of feed pump. valve handles. Check for chemical corrosion. 2-24