Xylem FLYGT 2640.181, Service And Repair Instructions, Page: 4 / 72

4.6 Assemble the pump.......................................................................................................... 37
4.6.1 Assembly overview.....................................................................................................37
4.6.2 Install the stator...........................................................................................................38
4.6.3 Install the electrical connections...............................................................................39
4.6.4 Install the pump top................................................................................................... 39
4.6.5 Install the bearings..................................................................................................... 40
4.6.6 Install the shaft unit.....................................................................................................42
4.6.7 Install the mechanical seal: Drainage versions....................................................... 44
4.6.8 Install the mechanical seal: Sludge versions........................................................... 47
4.6.9 Check the seal tightness............................................................................................ 49
4.6.10 Install the impeller: Drainage version.................................................................... 49
4.6.11 Install the impeller: Sludge version........................................................................52
4.6.12 Install the discharge connection or cover............................................................. 54
4.7 Service.................................................................................................................................55
4.7.1 Inspection.................................................................................................................... 55
4.7.2 Overhaul...................................................................................................................... 56
5 Troubleshooting....................................................................................................................... 57
5.1 Electrical troubleshooting.................................................................................................57
5.2 The pump does not start...................................................................................................57
5.3 The pump does not stop when a level sensor is used.................................................. 58
5.4 The pump starts-stops-starts in rapid sequence............................................................59
5.5 The pump runs but the motor protection trips..............................................................59
5.6 The pump delivers too little or no water.........................................................................60
6 Technical Reference.................................................................................................................61
6.1 Application limits............................................................................................................... 61
6.2 Motor data.......................................................................................................................... 61
6.3 Specific motor data............................................................................................................61
6.4 Dimensions and weights...................................................................................................63
6.5 Tools.................................................................................................................................... 64
6.6 Winding data......................................................................................................................67
Table of Contents
2 2640.181/.281 Service and Repair Instructions