Maintenance; Lubrication; Disassembly; Disassembly Precautions - Xylem Bell & Gossett e-80SC Series Instruction Manual

6 Maintenance

6 Maintenance

6.1 Lubrication

The pump motor has been lubricated at the factory. Keep the motor properly lubricated in
accordance with the motor manufacturer's instructions.

6.2 Disassembly

6.2.1 Disassembly precautions

This manual clearly identifies accepted methods for disassembling units. These methods
must be adhered to.
WARNING:
• Make sure that the pump is isolated from the system and that pressure is relieved
before you disassemble the pump, remove plugs, open vent or drain valves, or
disconnect the piping.
• 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.
• Crush hazard. The unit and the components can be heavy. Use proper lifting methods
and wear steel-toed shoes at all times.
NOTICE:
Make sure that all replacement parts are available before you disassemble the pump for
overhaul.

6.2.2 Drain the pump

CAUTION:
• Allow all system and pump components to cool before you handle them to prevent
physical injury.
1. Close the isolation valves on the suction and discharge sides of the pump.
You must drain the system if no valves are installed.
2. Open the drain valve.
Do not proceed until liquid stops coming out of the drain valve. If liquid continues to
flow from the drain valve, the isolation valves are not sealing properly and you must
repair them before you proceed.
3. Leave the drain valve open and remove the drain plug located on the bottom of the
pump housing.
Do not reinstall the plug or close the drain valve until the reassembly is complete.
4. Drain the liquid from the piping and flush the pump if it is necessary.
5. Disconnect all auxiliary piping and tubing.

6.2.3 Impeller trimming guidelines

Machining
When it is necessary to reduce the pump flow rate and generated head by trimming the
impeller diameter, the following guidelines apply for stainless steel impellers:
18 Series e-80SC INSTRUCTION MANUAL