
7.5.7 Assemble the plain bearing MPA and MPR..........................................................81
7.6 Replace the shaft seal.................................................................................................82
7.6.1 Requirements........................................................................................................82
7.6.2 Disassemble the mechanical seal.........................................................................83
7.6.3 Assemble the mechanical seal............................................................................. 86
7.6.4 Disassemble the water-cooled mechanical seal...................................................87
7.6.5 Assemble the water-cooled mechanical seal........................................................90
7.6.6 Disassemble the cartridge seal.............................................................................91
7.6.7 Assemble the cartridge seal..................................................................................94
7.6.8 Replace the shaft sleeve of the stuffing box......................................................... 95
7.6.9 Assemble steps for all shaft seals.........................................................................99
7.7 Replace the balancing drum......................................................................................100
7.7.1 Disassemble the balancing drum........................................................................101
7.7.2 Assemble the balancing drum.............................................................................101
7.8 Replace the hydraulic parts.......................................................................................102
7.8.1 Disassemble the hydraulic part...........................................................................102
7.8.2 Disassemble the hydraulic part MPD..................................................................103
7.8.3 Disassemble the hydraulic part MPA, MPD, and MPR.......................................104
7.9 Assemble the hydraulic parts.................................................................................... 106
7.9.1 Assemble the hydraulic part MPA and MPR.......................................................108
7.9.2 Assemble the hydraulic part MPA, MPD, and MPR (mount the suction casing).108
7.10 Replace the wear ring..............................................................................................108
7.11 Assemble the complete disassembled pump.......................................................... 109
8 Troubleshooting............................................................................................................... 110
8.1 The main switch is on, but the electric pump does not start......................................110
8.2 The electric pump starts, but the thermal protection trips a varying time after..........110
8.3 The pump runs but delivers too little or no liquid.......................................................110
8.4 The main switch is on, but the electric pump does not start......................................110
8.5 The electric pump starts, but the thermal protector trips or the fuses blow
immediately after......................................................................................................... 110
8.6 The electric pump starts, but the thermal protector trips or the fuses blow a short
time after......................................................................................................................111
8.7 The electric pump starts, but the thermal protector trips a varying time after............111
8.8 The electric pump starts, but the system's general protection is activated............... 111
8.9 The electric pump starts, but the system's residual current device (RCD) is
activated...................................................................................................................... 111
8.10 The pump runs but delivers too little or no liquid.....................................................111
8.11 The electric pump stops, and then rotates in the wrong direction .......................... 112
8.12 The pump starts up too frequently...........................................................................112
8.13 The pump vibrates and generates too much noise................................................. 112
9 Technical Specification.................................................................................................... 113
9.1 Torque specification.................................................................................................. 113
9.1.1 Tightening torques of the pump screws..............................................................113
9.1.2 Anchor bolts........................................................................................................115
9.1.3 Impeller nuts....................................................................................................... 115
9.1.4 Plugs...................................................................................................................116
9.2 Pump data Mechanical Seals and Coupling sizes.....................................................116
9.3 Product name............................................................................................................ 117
10 Exploded View............................................................................................................... 118
10.1 Exploded view......................................................................................................... 118
11 Recommended spare parts and stand-by pumps.......................................................... 130
11.1 Ordering of spare parts............................................................................................130
11.2 Stand-by pumps...................................................................................................... 130
Table of Contents
e-MP Instruction manual 3