Xylem e-XC, Instruction Manual

Page: 52 / 112

6.5.5 Pump disassembly
Before disassembling the pump, identify your pump configuration to ensure the correct
set of disassembly instructions are adhered to. View the e-XC pump exploded view in
e-
XC exploded view on page 104 and become familiar with the general assembly layout of
the pump as well as part names. This will allow for easier understanding of disassembly
instructions.
Check which of the following characteristics apply to your pump; circle the main features
within your configuration for future reference, if desired.
Characteristic Configuration Option
Casing Design
1
Drop-in stuffing box
2
Integrated stuffing box
3
Shaft Design Shaft with sleeve (Dry Shaft) Sleeveless shaft (Wet Shaft)
Sealing Option Packing Mechanical Seal Cartridge Seal
Mechanical Seal
Model
4
MR1 MR2 MR3 MR4
Cartridge Seal Model
4
MR5 MR6 MR7 MR8
Bearing Lubrication
Method
Grease Oil
1
See the e-XC Performance Curves and Technical Data document to determine which casing design applies for any
given model.
2
The drop-in stuffing box design utilizes a removable seal chamber as the fastening point for the various sealing
configurations. The stuffing box may also be known as a seal body.
3
The integrated stuffing box design incorporates the seal chamber into the upper and lower casing halves. Therefore,
sealing components fasten directly to the pump casing.
4
Row is only applicable for either mechanical or cartridge seal configurations. For more information on the MR series
mechanical seals, see the e-XC Performance Curves and Technical Data document.
WARNING:
• Always disconnect and lock out power to the driver before you perform any installation
or maintenance tasks. Failure to disconnect and lock out driver power will result in
serious physical injury.
• Extreme temperature hazard: Allow pump temperatures to reach acceptable levels
before proceeding. Open drain valve, do not proceed until liquid stops coming out of
the drain valve. If liquid does not stop flowing from drain valve, isolation valves are not
sealing and should be repaired before proceeding. After liquid stops flowing from
drain valve, leave drain valve open and continue. Remove the drain plug located on
the bottom of the pump housing. Do not reinstall plug or close drain valve until
reassembly is completed. Failure to follow these instructions could result in property
damage and/or moderate personal injury.
6.5.6 Pump disassembly for pumps with drop-in stuffing box and sleeve over shaft (dry
shaft) design
Unless stated otherwise, follow the disassembly instructions assuming the outboard end
of the pump (non-drive end) must be disassembled first. The term ‘inboard’ refers to the
coupling end (drive-end) of the pump shaft. Similarly, the term ‘stuffing box’ is
interchangeable with ‘seal body’.
1. Close valves on suction and discharge sides of pump. If no valves are installed, it will
be necessary to drain the pump.
2. Remove coupling guard and disconnect coupling. Refer to Remove the hex coupling
guard for guards with vertical supports on page 45 and Remove the hex coupling
guard for floating guards on page 47 for specific removal instructions.
3. Disconnect and remove external flush lines and their fittings.
4. Remove parting flange bolts and tapered alignment pins.
6 Maintenance
50 e-XC INSTRUCTION MANUAL