6.4.2 Tools required................................................................................................................................ 80
6.4.3 Drain the pump..............................................................................................................................81
6.4.4 Remove the coupling .................................................................................................................... 81
6.4.5 Remove the back pull-out assembly ............................................................................................. 81
6.4.6 Remove the coupling hub ............................................................................................................. 83
6.4.7 Impeller removal............................................................................................................................84
6.4.8 Shaft guard removal (if provided)..................................................................................................85
6.4.9 Seal-chamber cover removal ........................................................................................................ 86
6.4.10 Remove the seal-chamber cover (3196, CV 3196, HT 3196, LF 3196, 3796)............................ 86
6.4.11 Remove the stuffing-box cover (3196, CV 3196, HT 3196, LF 3196, 3796) ............................... 87
6.4.12 Remove the dynamic seal ..........................................................................................................89
6.4.13 Remove the frame adapter (MTi, LTi)..........................................................................................89
6.4.14 Remove the inboard labyrinth oil seal .........................................................................................90
6.4.15 Power-end disassembly ..............................................................................................................90
6.4.16 Disassemble the bearing frame .................................................................................................. 96
6.4.17 Guidelines for i-ALERT®2 Equipment Health Monitor disposal .................................................. 97
6.4.18 Disassemble the C-face adapter.................................................................................................97
6.5 Pre-assembly inspections .......................................................................................................................97
6.5.1 Replacement guidelines................................................................................................................98
6.5.2 Shaft and sleeve replacement guidelines ..................................................................................... 99
6.5.3 Bearing-frame inspection ............................................................................................................ 100
6.5.4 C-face adapter inspection ........................................................................................................... 101
6.5.5 Seal chamber and stuffing box cover inspection......................................................................... 102
6.5.6 Bearings inspection.....................................................................................................................104
6.5.7 Bearing-housing inspection.........................................................................................................104
6.5.8 Bearing fits and tolerances..........................................................................................................105
6.6 Reassembly........................................................................................................................................... 105
6.6.1 Assemble the rotating element and the bearing frame (STi and MTi)......................................... 105
6.6.2 Assemble the rotating element and the bearing frame (STi and MTi with duplex bearings) ....... 108
6.6.3 Assemble the rotating element and the bearing frame (LTi) ....................................................... 112
6.6.4 Assemble the frame .................................................................................................................... 115
6.6.5 INPRO labyrinth oil seal description............................................................................................ 119
6.6.6 Assemble the INPRO labyrinth oil seal ....................................................................................... 119
6.6.7 Assemble the C-face adapter......................................................................................................120
6.6.8 Shaft sealing ............................................................................................................................... 120
6.6.9 Shaft guard installation (if provided)............................................................................................128
6.6.10 Install the impeller ..................................................................................................................... 130
6.6.11 Attach the i-ALERT®2 Equipment Health Monitor to the pump ................................................132
6.6.12 Post-assembly checks .............................................................................................................. 133
6.6.13 Install the back pull-out assembly (except HT 3196) ................................................................ 133
6.6.14 Assembly references.................................................................................................................135
6.6.15 Spare parts................................................................................................................................137
6.7 Interchangeability drawings...................................................................................................................138
6.7.1 LF 3196 interchangeability ..........................................................................................................138
6.8 Lubrication conversion ..........................................................................................................................138
6.8.1 Frame lubrication conversion ......................................................................................................138
6.8.2 Convert from greased-for-life or regreaseable to oil-lubricated bearings.................................... 139
6.8.3 Conversion from flood-oil to pure-oil mist....................................................................................140
6.8.4 Convert from flood oil to regreaseable ........................................................................................140
Table of Contents
Model LF 3196 i-FRAME Installation, Operation, and Maintenance Manual 3