CPE C Series Manual - Página 8
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6. MAINTENANCE
Caution:
Before servicing
pump, disconnect
electrical power
source, carefully
relieve all pressure
and drain all fluids
from pump and
connected piping.
CPE Systems Inc.
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For C-Series pumps equipped with the "Groove-In-Shaft" design (types D, DG, or F seals
only), it is not necessary to disassemble if used in a Clean-In-Place installation. In some
applications, it may be necessary to disassemble parts of the pump for cleaning and sanitizing.
The extent of disassembly will depend on the application and the type of seal used in your
pump. It is recommended that periodic inspection of all parts of the pump be made to prevent
malfunctions caused by worn or broken parts. Disassembly for repair is the same procedure as
for cleaning.
6.1 Disassembly
Disassembly of the pump wet end
1. Disconnect the inlet and outlet lines.
2. Remove seal guard assembly with a wrench of appropriate size.
3. Turn the wing nut on the clamp assembly until tension on the clamp saddle is relieved.
(On a C100 pump remove the two wing nuts.
4. Open the clamp and remove the casing. (C114 and large pumps only)
5. Push back on the impeller and center the retainer pin in the stub shaft.
6. Slide the impeller forward and remove it. Do not try to remove the retainer before
removing the impeller, as this will cause damage to the retainer, shaft, and impeller.
7. Rotate the backplate until the backplate pins clear the pins in the adapter and remove
the backplate
8. Remove the casing gasket.
9. Remove the carbon seal, seal o-ring, seal cup, and spring.
Note: Protect the sealing surface of the backplate against nicks and scratches while
removing, cleaning, and reassembling.
D & F Seal Service
1. For D and F seals, examine the backplate sealing surface carefully for any damage that
will shorten seal life.
2. Remove the carbon seal, o-ring seal, cup, and spring. If your pump is equipped with a
drive collar, remove it by loosening set screws and sliding the collar off the stub shaft.
3. Carefully inspect the seal o-ring and carbon seal for signs of abrasions, cuts or other
wear that would cause leakage. When the extension of the carbon seal face extends
less than 1/32" from the body, it is advisable that the carbon seal be replaced.
4. Remove the cascading water attachment, if included. Remove the rubber shaft
deflector by prying it gently from the rear, while sliding it forward. Examine the
deflector for tearing, loose fit, or other defects that would allow fluid leakage into the
motor along the armature shaft.
5. Remove the bolts securing the adapter to the motor frame and remove the adapter.
Loosen the 4 set screws securing the stub shaft to the motor armature. Remove the
stub shaft by prying from the back with a flat bar. The stub shaft is a tight fit but can
be removed by evenly applying pressure around the periphery of the shaft with a pry
bar. (This step is not required for seal replacement)
6. Examine the stub shaft sealing surface for nicks or scratches which can cause
excessive o-ring seal wear or leaking.
7. Inspect the casing clamp for damage or wear and replace as required.
8. Inspect the wheels, adapter, and casing; replace if necessary.
www.cpesystems.com
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+1 800 668 2268
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