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Z-Series Coro-Vane
Please Note: The photos listed below contain a Z2000;
however, all Z-Series pumps use the same procedures for
seal replacement.
To determine the parts needed for repair, refer to Appendix
A, page 16 for model number and identification code and
pages 13 through 15 for parts details.
CAUTION! Bleed all pressure from the pump and piping
before starting to install your seal assembly.
Cleanliness
Even the smallest amount of dirt on your new seal can cause
early failure. Keep all parts, tools and your hands clean
Step 1
Depressurize and open the pump
Loosen the head bolts and remove one head with the
bearing cap attached, while holding in on the shaft.
Step 2
Seal seat and grease seal removal
NOTE: The above photo is of a cutaway for better details.
Remove the head O-ring and place head on the workbench as
shown. Lightly tap the seal out of the head with a long screwdriver
by reaching through the bearing cap opening. Inspect the inner
lip seal and remove, if necessary, using same process.
®
Seal Replacement Instructions
while installing the seal. Never touch the smooth lapped
faces of the carbon rotor or seal seat. For LP-Gas,
anhydrous ammonia and similar liquids, you are trying to
seal a fluid that is 5 to 10 times thinner than water! Your
new seal needs every chance it can get, so keep it clean.
Workmanship
Your Corken pump is a precision piece of equipment with
very close clearances. Treat it as such. Never use force
during assembly or disassembly (see steps 1 through 10).
Step 3
Seal seat and grease seal installation
NOTE: The above photo is of a cutaway for better details.Turn
the head over and install the new grease seal face down by
pressing into the bore behind the main bearing. This can best
be accomplished using the old seal seat with the O-ring
removed. Apply a generous amount of light oil to the new seal
seat. Using the protective disc, gently press seal into place.
Step 4
Seal retainer and carbon removal
Remove the old seal assembly from the pump shaft while pressing
against the sideplate. This will allow the seal retainer assembly
to be removed without pulling the rotor-shaft out of the pump.
9
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