User guide

Before you start the pump
Check the seal and all flush piping.
If the pump is shipped with oil-lubricated seals, keep the seal faces lubricated with oil at all times.
Packed stuffing-box maintenance
WARNING:
• Packed stuffing boxes are not allowed in an ATEX-classified environment.
• Never attempt to replace the packing until the driver is properly locked out and the coupling spacer is
removed.
Lubrication intervals
The lubrication intervals vary and depend upon the temperature and gland tightness. Keep the grease cup
full at all times.
Periodically make several turns on the grease-cup cap while you inject fresh grease into the stuffing box.
Check the pump daily upon initial operation, and extend this interval as required.
NOTICE:
Do not over-tighten the stuffing box. Excessive pressure can wear out packing prematurely and seriously
damage the shaft.
Packing replacement
Replace the packing in this sequence:
1. Three rings of packing
2. Lantern ring
3. Two rings of packing
4. Gland
Disassembly
Disassembly precautions
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.
• The pump can handle hazardous and toxic fluids. Identify the contents of the pump and observe
proper decontamination procedures in order to eliminate the possible exposure to any hazardous or
toxic fluids. Wear the proper personal protective equipment. Potential hazards include, but are not
limited to, high temperature, flammable, acidic, caustic, explosive, and other risks. You must handle
and dispose of pumped fluid in compliance with the applicable environmental regulations.
NOTICE:
Make sure that all replacement parts are available before you disassemble the pump for overhaul.
Maintenance (Continued)
38 Model 3171 Installation, Operation, and Maintenance Manual