
5.5 Operational checklist ............................................................................................................................... 34
5.6 Shut down the pump ............................................................................................................................... 35
5.7 Freeze protection .................................................................................................................................... 35
6 Maintenance.....................................................................................................................................................36
6.1 Maintenance schedule ............................................................................................................................ 36
6.2 Flood-damaged pumps ........................................................................................................................... 37
6.3 Bearing maintenance .............................................................................................................................. 37
6.3.1 Regrease the grease-lubricated bearings .....................................................................................37
6.3.2 Lubricate the oil-lubricated bearings ............................................................................................. 39
6.3.3 Bearing temperatures....................................................................................................................41
6.3.4 Coupling lubrication.......................................................................................................................41
6.4 Shaft-seal maintenance........................................................................................................................... 42
6.4.1 Packed stuffing box maintenance ................................................................................................. 42
6.4.2 Mechanical seal maintenance.......................................................................................................43
6.5 Disassembly ............................................................................................................................................ 43
6.5.1 Disassembly precautions .............................................................................................................. 43
6.5.2 Change the rotation.......................................................................................................................44
6.5.3 Remove the upper half of the casing ............................................................................................45
6.5.4 Remove the rotating element ........................................................................................................45
6.5.5 Disassemble the pump..................................................................................................................45
6.6 Preassembly............................................................................................................................................ 46
6.6.1 Replace wear parts ....................................................................................................................... 46
6.6.2 Adjustable wear rings....................................................................................................................46
6.7 Reassembly............................................................................................................................................. 48
6.7.1 Assemble the pump with packing..................................................................................................48
6.7.2 Assemble the pump with mechanical seals ..................................................................................48
6.7.3 Install the bearings ........................................................................................................................51
6.7.4 Install the rotating element ............................................................................................................51
6.7.5 Install the gaskets .........................................................................................................................52
6.7.6 Assemble the casing .....................................................................................................................52
6.7.7 Complete the assembly.................................................................................................................53
6.8 Vertical units ............................................................................................................................................ 53
6.8.1 Remove the upper half of the casing ............................................................................................53
6.8.2 Remove the rotating element ........................................................................................................56
6.8.3 Assemble the rotating element......................................................................................................56
6.8.4 Assemble the casing .....................................................................................................................57
6.8.5 Remove the complete pump ......................................................................................................... 58
6.9 Spare parts.............................................................................................................................................. 58
7 Troubleshooting ..............................................................................................................................................59
7.1 Troubleshooting....................................................................................................................................... 59
8 Parts Listings and Cross-Sectionals.............................................................................................................62
8.1 Drawings ................................................................................................................................................. 62
8.2 Parts list................................................................................................................................................... 64
9 Technical Reference........................................................................................................................................ 66
9.1 Engineering data .....................................................................................................................................66
10 Other Relevant Documentation or Manuals................................................................................................69
10.1 For additional documentation ................................................................................................................ 69
Table of Contents
2 Model 3409 Installation, Operation, and Maintenance Manual