INSTRUCTION CODE NUMBER: 74STRNRANN

 

INSTRUCTION CODE DESCRIPTION: EPRB PUMPS STRAINER WS4010 MAINTENANCE

 

  1. EQUIPMENT TO BE MAINTAINED: TWR3 WS4010 BLDG 16 SUPPLY STRAINER

    2.  

  2. SPECIAL TOOLS / EQUIPMENT: NONE

    3.  

  3. PREREQUISITES / PRECAUTIONS:

 

NOTE: The NASA LeRC Safety Manual-TM104438 can be found on the Lewis Web (http://www-osma.lerc.nasa.gov/lsm/) under Policy and Management

 

  1. COORDINATE WITH THE CCB CENTRAL AIR DISPATCHER BEFORE STARTING WORK, PABX 3-3200

    2.  

  2. LOCKOUT AND TAG THE ASSOCIATED EQUIPMENT (IF APPLICABLE) PER THE NASA LEWIS SAFETY MANUAL, CHAPTER 9.

    3.  

    NOTE: LOCKOUT AND TAGOUT MUST BE DONE THROUGH THE CENTRAL AIR DISPATCHER AT PABX 3-3200 AND THE ELECTRIC POWER DISPATCHER AT PABX3-3100.

     

  3. A HARD HAT/PERSONAL PROTECTIVE EQUIPMENT ARE REQUIRED AS PER THE NASA LEWIS RESEARCH SAFETY MANUAL, CHAPTER 15.

    4.  

  4. USE THE "BUDDY SYSTEM" PER THE NASA LEWIS SAFETY MANUAL, CHAPTER 22.

 

 

  1. TASK DESCRIPTION:

 

NOTE : SERVICE STRAINER WS4010 ONLY WHEN EPRB, BUILDING 16,PUMPS ARE OFF.

CONTACT ROBERT ROMAN @ EXT. 3-5600 OR THE EPRB BUILDING MANAGER BEFORE SERVICING. DO NOT PERFORM THIS TASK WITHOUT THEIR KNOWLEDGE

 

 
  1. BACKWASH OF STRAINER IN CW SUPPLY LINE FOR EPRB #16

    2.  

    The automatic strainer is designed for the continuous straining of cooling tower water with the automatic removal of solids. To automatically remove the collected solids, a differential pressure device set at 3 PSIG actuates the backwash cycle for a period predetermined by the time delay relay in the control box. A gearmotor revolves the backwash arm which in turn reverse flushes each Poro-Edge tube in a consecutive manner when the backwash valve is open.

     

    The backwash cycle can also be put into motion by placing the control switch in the manual position. This can be done periodically for a check but normally the switch is left in the automatic position.

     

    The strainer is located in a heated pit in the common discharge line from CW Pumps #8 and #9 which is the CW supply line to EPRB #16.

     

    If strainer servicing is required refer to Reference Document for the Adams Poro-Edge Automatic Strainer in Volume I of the CAEB Facility Cooling Towers #3 and #6 and Pump Building #74 Equipment, Manufacturers' Manuals and Catalogs.

  2. PERFORM A VISUAL INSPECTION OF THE STRAINER AND CONTROLS LOCATED IN THE STRAINER PIT ADJACENT TO THE EPRB PUMPS.

    3.  

    Check for loose equipment mounts, foundation, abnormal wear and tear, physical changes, signs of degradation, evidence of excessive temperature, rust, chemical action, abrasive action, signs of leaking, water, oil or grease, excessive vibration, hot or noisy bearings, improper ventilation. Check for dirt, torn material, etc.

    Check the integrity of controls, pressure switches, gages, tubing and conduit

    Check the operation of the pit heater. Check that the floor drain is clear. Lean the pit of debris.

    Correct any deficiencies.

     

  3. LUBRICATE THE MOTOR AND GEARBOX

    4.  

    Check the lubricant in the gearbox. Add lubricant if necessary.

    Lubricate the motor bearings if required.

     

    Maintenance Recommendations for Winsmith 4MSFD Speed Reducer

     

    The Winsmith Speed Reducer is equipped with three oil plugs, a fill plug, a drain plug, and a level plug. The normal oil level is at the bottom of the level plug.

     

    Lubrication. When changing oil for any reason, it should be remembered that oils of various types may not be compatible. Therefore, when changing to a different oil, it is recommended that the housing be completely drained and thoroughly flushed with a light flushing oil prior to refilling with the appropriate lubricant. Gear oil is available from stores stock, NSN 9150-00-973-9500.

     

    Grease Fittings. Some WINSMITH reducers are equipped with grease fittings to lubricate bearings not adequately lubricated by the oil splash. These fittings should be periodically be pressure lubricated with a short fiber grease with a work penetration of 310 to 340 and an ASTM drop point of 250° F minimum.

     

  4. CHECK THE BACKWASH CONTROL PANEL

    5.  

    Remove the cover from the control panel. Check the wiring terminations for tightness. Check the condition of the control relays and switches for evidence of overheating, arcing, burning, or other damage. Check the operation and accuracy of the electric backwash pressure gage

     

  5. MCE TEST MOTOR

    6.  

    Annually test motors per instruction code 64MEG001 using a motor circuit evaluator. Record results. Provide information to the PT&I organization

     

  6. OBSERVE THE PERFORMANCE DURING OPERATION

    7.  

    Check for vibration, bearing noise, leaks, operation of controls, limit switches, pressure switches, and any other control and operating mechanism. Check the suction and discharge pressures.

     

  7. Take appropriate corrective action to report and repair any problems. Record problems and corrective actions in MP2.

    8.  

  8. CLEAN EQUIPMENT AND SURROUNDING AREA.

    9.  

    Clean dust, oil, grease, water, etc., from the equipment and the surrounding area. Dispose of oil soaked rags, etc., properly.

     

     

  9. RESTORE THE SYSTEM TO NORMAL STANDBY MODE.

 

 

  1. WORKSHEET / CHECKLIST:

 

MAINTENANCE PERSONNEL FEEDBACK FORM

 

A response to the following questions is requested to incorporate any necessary changes. After the work is completed, please answer the following questions and feel free to mark-up the text as necessary.

 

Is the equipment barcode label number in place and correct? Yes____ No_____

If not, verify if the equipment has been replaced or if the barcode label is missing. Submit new equipment data and maintenance forms and/or replacement barcode label numbers to the facility manager.

 

Should the current frequency of this task be modified? If yes, why?

 

 

What is the condition of the equipment in the area work is being performed? Please note any discrepancies.

 

 

 

 

Are there any errors in the procedure text?

 

 

Should the order of any steps be changed?

 

 

 

Are there any safety concerns that should be addressed?

 

 

 

Would modifications to the work order make it easier to utilize?

 

Should this task or its instruction code be combined with other tasks or

 

Are there any steps or other useful information that you would like to be included? (i.e. special tools, part information, or helpful hints, etc.)

 

 

Is this a valid task? If not, why?

 

 

 

TASK START DATE:___________ TASK COMPLETION DATE:____________

 

TIME REQUIRED TO PERFORM TASK:___________

 

NAME(S)______________________________________________