Table of Contents
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Table of Contents
Couple the pump and driver .................................................................................................. 37
Coupling guard assembly ................................................................................................... 37
Bearing lubrication .............................................................................................................. 46
Shaft sealing with a mechanical seal .................................................................................... 48
Connection of sealing liquid for mechanical seals ................................................................. 49
Pump priming ........................................................................................................................ 49
Prime the pump with the suction supply above the pump ................................................... 49
Prime the pump with the suction supply below the pump ................................................... 50
Other methods of priming the pump ................................................................................... 51
Start the pump ...................................................................................................................... 51
Pump operation precautions ................................................................................................. 52
Shut down the pump ............................................................................................................. 53
Make the final alignment of the pump and driver ................................................................... 53
Dowel the pump casing (optional) ......................................................................................... 54
Maintenance ........................................................................................................................... 55
Maintenance schedule .......................................................................................................... 55
Bearing maintenance ............................................................................................................ 56
Mechanical-seal maintenance .............................................................................................. 56
Disassembly ......................................................................................................................... 57
Disassembly precautions ................................................................................................... 57
Tools required .................................................................................................................... 57
Drain the pump ................................................................................................................... 57
Remove the back pull-out assembly ................................................................................... 58
Remove the coupling hub ................................................................................................... 59
Remove the impeller (3700/3710) ...................................................................................... 59
Remove the impeller (3703) ............................................................................................... 60
Remove the impeller (3700LF) ........................................................................................... 61
Remove the seal-chamber cover ........................................................................................ 61
Remove the optional water-jacket cover ............................................................................. 63
Disassemble the power end ............................................................................................... 63
Preassembly inspections ...................................................................................................... 68
Replacement guidelines ..................................................................................................... 68
Shaft replacement guidelines ............................................................................................. 70
Bearings inspection ............................................................................................................ 70
Wear rings inspection and replacement (Not applicable for 3703/3700LF) ........................ 71
Seal-chamber cover inspection and replacement ............................................................... 76
Bearing-frame inspection ................................................................................................... 78
Bearing fits and tolerances ................................................................................................. 79
Reassembly .......................................................................................................................... 80
Assemble the power end .................................................................................................... 80
Assemble the frame ............................................................................................................ 84
Install the optional water-jacket cover ................................................................................. 89
Install the seal-chamber cover ............................................................................................ 90
Install the cartridge-type mechanical seal and seal-chamber cover ................................... 94
Determining impeller spacer thickness (applicable for 3703/3700LF) ................................ 95
Install the impeller (3700/3710) .......................................................................................... 95
Install the impeller (3703) ................................................................................................... 95
Install the impeller (3700LF) ............................................................................................... 96
Install the coupling hub ....................................................................................................... 96
Install the back pull-out assembly in the casing .................................................................. 97
Post-assembly checks ........................................................................................................ 98
Assembly references .......................................................................................................... 98
Troubleshooting .................................................................................................................. 101
Operation troubleshooting ................................................................................................... 101
Alignment troubleshooting .................................................................................................. 102
2
Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Manual
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Table of Contents
Troubleshooting
