9
MAINTENANCE
REPAIR
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.
Note:
Protect the sealing surface of the backplate against nicks and scratches while removing,
cleaning and reassembling.
1.
For D and F seals, examine the backplate sealing surface carefully for any defects that will
shorten seal life.
2.
Remove the carbon seal, o-ring seal, cup and spring. Remove the drive collar by loosening set
screws and sliding collar off the stub shaft.
3.
The balanced seal is designed for outside application. Sealing of the process fluid along the shaft
is accomplished by action of the process pressure on an o-ring seal installed in a groove in the
carbon seal. The same action pressurizes the o-ring groove and augments the spring tension in
keeping a tight joint at the sealing faces. The location or width of the sealing face controls the
balancing of the seal.
4.
Carefully inspect the o-ring seal 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.
5.
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.
6.
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 the pry bar.
7.
Examine the stub shaft sealing surface for nicks or scratches which can cause excessive o-ring
seal wear or leaking.
8.
Attach a hoist to the motor if necessary, and remove the bolts securing the motor to the adjusting
leg brackets. Remove the set screws securing the adjustable legs and remove the legs.
Note:
The metal displaced by the set screws on the adjustable legs makes it necessary to tap the
legs out with a soft hammer. Rough spots should be filed down prior to reassembly.
9.
Inspect casing clamp for damage or wear and replace as required. Inspect the adjusting legs,
adjusting leg brackets, adapter and casing and replace if necessary. Motor maintenance, repair
and wiring are not covered in this manual. For specific information contact the motor
manufacturer.
Summary of Contents for C-Series
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