RS – Multi-Stage, I-280
Centrifugal Pump 280 – 16.03.EN
28
XI. SERVICE AND REPAIR.
Refer to Figures 13, 14, and 15 to locate the pump parts
by item number and parts list.
A. PREPARATIONS FOR DISASSEMBLY OF PUMP.
During disassembly, match mark parts so they can be
replaced in their original position. All parts should be
thoroughly cleaned or replaced with new, if necessary.
Sealing faces should be perfectly clean.
CAUTION
Factory authorized parts must be used to
safely maintain your Carver Pump.
NOTE
To avoid damage to O-rings, check to make
sure all parts are free of sharp edges or burrs.
Parts marked with * are options or vary by
pump or bearing frame size.
O-rings, ball bearings, oil seals/bearing
isolators, mechanical seals and gaskets if
disturbed from position should be replaced.
Close suction and/or discharge valves. The pump
should be cooled down to ambient temperature. The
casings must be empty and not under pressure.
After prolonged operation, components may not be
easily removed from shaft. In such instances, rust
solvent may be used and suitable extracting tools
applied wherever possible. DO NOT use force under
any circumstances. Refer to Table 15, Recommended
Equipment, for proper tooling during disassembly and
assembly. Refer to appropriate sectional drawing for
location of parts followed by an item number.
Prepare the pumping unit for disassembly using the
following list:
1. Read this entire section and study the
applicable sectional view drawing and parts list
before disassembling the pump.
2. Stop the pumping unit; refer to Section VIII,
Paragraph G.
CAUTION
Before attempting to disassemble the pump,
the electrical power supply to the driver must
be locked and tagged in the “OFF” position to
prevent injury or death to personnel servicing
the pumping unit.
When pump is handling hazardous fluid,
extreme care must be taken to ensure safety of
personnel when attempting to drain pump and
piping before disconnecting the pumping unit.
Suitable protection devices should be used
and/or protective clothing should be worn.
3. For cartridge mechanical seals (90* or 91*),
reinstall seal clip.
4. Disconnect piping, gauge lines, and auxiliary
connections, as necessary.
5. Drain pump by removing the following plugs:
plug (424) form the bottom of each interstage
case (111) and suction case (9), and plug (421*)
from discharge case (1). If necessary, flush
pump to remove corrosive or toxic pumpage.
Collect and dispose of corrosive or toxic
material appropriately.
6. Drain oil from bearing frame by removing pipe
plugs (426) from bearing caps (37 and 37A*).
7. Confirm water from the oil cooler (215A*) is
drained.
8. Disconnect all male connector retaining nuts
from male connectors (410 and 561*) bodies, as
applicable. Remove tubing (400 and 401), as
applicable. Retaining nuts will remain with
tubing.
9. Remove coupling guard and disconnect
coupling halves.
10. Remove nuts and washers, as applicable from
discharge (1) and suction casing feet (9) holding
pump to base. Move the pump to a suitable
work area for disassembly; refer to Section VII,
Paragraph B for handling of the pump.
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