Goulds Pumps 3700 - IOM - Manual (Page 61)

Maintenance
Drain the pump
CAUTION:
• Allow all system and pump components to cool before you handle them to prevent physical injury.
• If your pump is a Model NM3171, NM3196, 3198, 3298, V3298, SP3298, 4150, 4550, or 3107 there
is a possible risk of static electric discharge from plastic parts that are not properly grounded. If the
pumped fluid is non-conductive, drain and flush the pump with a conductive fluid under conditions
that will not allow for a spark to be released to the atmosphere.
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. Remove the oiler bottle and store it in a safe place.
7. Remove the coupling guard.
8. Remove the coupling spacer.
Follow the coupling manufacturer's instructions for assistance.
9. Disconnect the coupling.
Remove the back pull-out assembly
CAUTION:
Never remove the back pull-out assembly without assistance.
1. Remove the casing stud nuts.
WARNING:
• If you must use heat to remove parts, you must drain all liquid and remove all vapor. To do this,
purge the casing, seal chamber, and so forth, with dry compressed air or inert gas.
2. Tighten the jackscrews evenly, using an alternating pattern, in order to remove the back
pull-out assembly.
Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance 59
Manual