1. Overview

This guide provides step-by-step instructions for replacing the mechanical seal of the EBP(ECU Booster Pump, Model : CRN 15).
Before proceeding, ensure all safety precautions are followed, and consult the After-Sales (AS) Team if needed.

2. Preparation Before Work

1. Turn off all BWTS breakers (MCP, MPP, PSE) at the vessel’s Main Switchboard (MSBD).
2. Remove the coupling guards.
   
3. Detach the coupling:
   • Remove the four bolts (two on either side).
   • Pry the two halves apart after removing the bolts.
     

3. Disassembly Process

Step 1: Remove the Motor & Shaft Seal

4. Remove the four motor bolts and detach the motor from the motor stool.
   
5. Loosen the three set screws to remove the shaft seal:
   • Do not fully remove the set screws; just loosen them.
     
   • Pull out the shaft pin.
     
6. Remove the strap seal:
   • Use a socket or spanner to loosen it.
     
   • Once loosened enough, pull it straight up off the shaft.
     

4. Installing the New Mechanical Seal

7. Lubricate the pump shaft with soapy water.
   
8. Insert the new seal:
   • Push down on the round piece rather than the hex head.
     
   • Push it as far down as possible, then tighten by hand.
     
9. Tighten the shaft seal to the appropriate torque value.
   

5. Setting the Shaft Height

10. Reinsert the shaft pin:
         
    
    • Ensure it is positioned at the bottom before tightening the set screws.
      
    • Tighten each set screw lightly at first, then fully tighten in sequence.
         
11. Use the key (clipped inside the coupling guard):
    • Place it under the round part on the shaft seal.
    • Lift up slightly and slide the key in to set the height.
      

6. Reassembly Process

12. Reassemble the motor.
    
13. Install the two coupling halves:
    • If the motor has a keyway cut, align it properly.
    • Keep the gap between the coupling halves as equal as possible.
      
14. Insert and tighten the bolts:
    • Tighten alternately in a diagonal pattern to maintain alignment.
      
    • Torque to the specified value.
      

7. Final Checks & System Start-Up

15. Remove the key and place it on the backside of a coupling guard.
       
16. Reassemble the coupling guards.
    
17. Reconnect cables and turn on the BWTS breakers.
18. Pre-Operational Check:
    • Ensure all related valves are properly aligned before operating the EBP.
    • If FM301’s flow rate is not formed, perform air venting:
      • Open the EBP air vent plug during Ballasting.
        
      • Release the air until seawater flows out smoothly, then close the vent plug.
      • If the strainer is installed before the EBP, open the air vent valve during Ballasting.
        Then, close the vent valve once seawater flows smoothly.