
4
SECTION 4 - MAINTENANCE
PRIOR TO ANY DISASSEMBLY OR SERVICE
VERIFY THAT ALL REQUIREMENTS OF
STATUTORY REGULATIONS OR CODES ARE
MET AND THAT SPECIFIC SITE
REQUIREMENTS ETC. ARE SATISFIED.
Some inspections and maintenance tasks can be
performed with the pump 'in line' if complete
isolation, depressurising and purging procedures
have been completed. However for major
maintenance, it is recommended that the pump
be removed from the installation.
The following instructions regarding disassembly
and reassembly are relative to major
maintenance.
4.1 SPARE PARTS
When ordering spare parts, to ensure a minimum
delay and correct replacement to original
specification, always quote the pump serial
number which is located on the nameplate of the
pump.
Advise the name, cat # and quantity required.
Refer Drawing CMP082
Advise complete delivery instructions, transport
detail
4.2 PREPARATION FOR DISASSEMBLY
1. Obtain the appropriate work permit if
required.
2. Isolate the pump from liquids in suction and
discharge lines, depressurise and purge out
any toxic, flammable, corrosive or air-
hardening liquids.
3. Isolate power supply to motor.
4. Note driveshaft and porting orientation to
ensure correct reassembly.
5. Disconnect porting connections.
6. Remove pump from installation.
4.3 DISASSEMBLY
1. Remove lubrication harnesses and drain oil
from bearing housings (if oil lubricated).
2. Remove any plugs, vents etc. which may
hinder access to Bearing Housing nuts.
3. Remove Dustcaps from both ends of pump.
4. Unlock Lockwashers and Using a suitable
'C'
spanner, remove Shaft Locknuts (both
sides).
5. Loosen Sleeve Locknuts enough to just
clear the end of the sleeve. With a suitable
drift and hammer, sharply tap the faces of
the Sleeve Locknuts to release the Sleeves
from the Bearings.
6. Remove Bearing Housing Setscrews.
CAUTION
Place a support under Bearing Housings
which will allow Bearing Housings to be
removed from Pump without dropping as it
comes clear of the shaft where the locknut
thread begins. If the Bearing Housing does
not remain centred during removal the
Stationary Seal Face is likely to be chipped by
the thread on the shaft. Lubricate shaft before
removing Bearing Housing.
7. Screw two of the Bearing Housing
Setscrews (M20) into the extraction holes in
each Bearing Housing, tighten evenly to
remove bearing housing assembly. (It may
be necessary to tap the faces of the Sleeve
Locknuts again to fully release the Sleeves
from the Bearings)
8. Remove Sleeve Locknuts and remove
Sleeves from Bearings. If required, remove
Bearings from Bearing Housings.
9. Loosen the 6 grubscrews from each
Mechanical Seal Assembly. Carefully
remove Mechanical Seal Assemblies from
shaft.
10. Remove Cover setscrews, remove Cover
from inspection end.
11. Place a 37mm diameter x 120 mm long bar
inside Liner (this is to support Rotor during
removal - see Figure 5)
12. Partially withdraw Rotor/Shaft Assembly
from inspection end far enough to allow
string or tape to be wrapped around the rotor
to retain the vanes and pushrods in position.
13. Remove Rotor/Shaft Assembly.
14. Release grubscrews and remove Seal
Spacers from Shaft.