SVCN 7 INSTALLATION, OPERATION, & MAINTENANCE
1. Tag driver controls in the OFF position.
2. Isolate pump from the suction and discharge system and any other auxiliary systems.
3. Drain all operating fluids from the pump as follows:
a. Open the case drain valve, or remove the case drain plug, and allow the case to drain.
b. Remove the bearing housing drain plug and allow the bearing housing to drain.
c. Remove seal flush system drain plug(s), or disconnect and remove seal flush piping, and
allow the seal flush system to drain.
4. Deenergize and/or remove any pump monitoring equipment, auxiliary services, or other
equipment which may interfere with the maintenance or create a hazard to the personnel
performing the maintenance.
4.2 PACKING
If your pump is equipped with packing, then operations which involve removal and installation of
packing rings may be performed without a general disassembly of the pump. If you wish to repack
your pump, proceed as follows:
4.2.1 PACKING REMOVAL
To remove packing (if installed), remove packing gland, then pull packing and lantern ring from
stuffing box with packing removal hook.
4.2.2 PACKING INSTALLATION
To install packing (if installed), proceed as follows:
1. Clean shaft sleeve and packing gland thoroughly with a petroleum-base agent such as
kerosene or dry cleaning solvent and allow to dry.
2. Dip packing in a lubricating liquid which is compatible with your pumpage.
3. Slide first packing ring into box as far as possible by hand.
4. Slide a split sleeve (or an equivalent number of metal rings) against packing ring; install
packing gland and bottom rings by evenly tightening gland; remove gland and metal rings.
5. Slide in another packing ring with split joint 90° from that of next lower ring and repeat step
4. Continue procedure, dispensing with metal rings as necessary, until all packing rings and
lantern ring are installed. Make certain that lantern ring is installed in a manner that will
insure free passage of lubricating liquid to rings (see ASSEMBLY drawing).
6. Tighten packing gland snugly and allow it to set approximately 10 minutes; then loosen
packing gland nuts and tighten them finger tight.
7. Rotate shaft by hand, if possible, operate pump and check for nominal leakage: 5 to 15 drops
per minute is required.
4.3 DISASSEMBLY
4.3.1 HEAD-ROTOR REMOVAL
1. Disassemble and remove the coupling guard and coupling spacer.
DO2604-13
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