Goulds Pumps 3311 - IOM - Manual (Page 20)

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7.3.2 Mechanical seal
Generally, virtually no maintenance is required on
mechanical seals. The mechanical seal should exhibit only
light visible leakage. In the case of heavy leakage, the
mechanical seal should be checked (see Section 6.6).
7.3.3 Packed stuffing box
With a packed stuffing box, there is always a leakage in
the form of drops. In the case of heavy leakage, the
packing and the shaft wearing sleeve should be checked
(for scores).
7.3.4 Driving motor
Maintenance of the driving motor should be in
compliance with the manufacturer's instructions.
7.4 Disassembly
Operating troubles involving pump disassembly are
unlikely in the event of careful monitoring and
maintenance of the pump.
However, if trouble occurs, the reason should be found
before disassembly, if possible. Repair and overhaul work
should be carried out by Goulds Pumps personnel or the
pump should be inspected at the manufacturer's factory.
Please note that any disassembly work to be performed
during the warranty period requires the approval of
Goulds Pumps.
If you disassemble the pump, all components should be
treated with utmost care.
All parts must be cleaned carefully, checked for wear and
reconditioned or replaced by spare parts, if necessary. It is
vital that the shaft is checked for concentricity. Use only
genuine spare parts.
7.4.1 Preparation for disassembly
- Disconnect power to the motor.
- Drain the system between suction side and discharge
side shut-off valves.
- Disconnect and dismantle existing sensors and
monitoring devices, if necessary.
- Dismantle coupling.
- Drain the liquid from the pump.
- Dismantle shaft seal supply lines, if any.
- Unbolt the pump from the pipe work.
- Dismantle balancing line.
- Drain the oil from the bearing housings.
7.4.2 Replacement parts
For re-assembly, replace all O-rings.
The item numbers of replacement parts are given in the
components list, section 9.