MP Pumps CHEMFLO 5, 6, 7, 8 PUMPAKS INSTRUCTION - Manual (Page 3)

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The seal seat and seat cup will remain in the
pump adaptor. If not damaged or worn, do not
remove. If necessary, remove from the adaptor
counter bore with a piece of wood or a
screwdriver handle inserted through the adaptor
from the drive end. A sharp tap or two is
usually sufficient to knock out the seal seat. Use
caution in removing the seal seat so as not to
crack a ceramic seat.
TO REMOVE IMPELLER:
Remove seal bellows and spring assembly. On
some models, spring keeper can also be removed
now before removing impeller.
NOTE: The seal bellows will be bonded to the
shaft sleeve and will require some patience and
caution in removal in order not to damage the
seal bellow and cage.
Remove locknut from shaft; unscrew the
impeller from the shaft sleeve counter-clockwise
from the impeller end.
INSPECTION:
Check all parts for wear. For ease of reassembly
shaft sleeve should have all nicks and burrs
removed. Clean with light crocus cloth.
Replace damaged parts with new parts.
Inspect the seal seat and washer, seat cup, and
seal bellows for grooves, cuts, scuffmarks, or
other deterioration. If any of the parts are
damaged, a complete new assembly should be
installed.
REASSEMBLY:
All dirt and foreign matter should be removed.
If seal is to be reused, use soft clean cloth of
wipe seal faces.
Lubricate seal seat cup with liquid soap or clean
grease and press seal seat into adaptor counter
bore, seating it firmly and squarely. Use caution
so as not to mar the lapped face of the seal seat.
Assemble shaft sleeve; seal spring keeper,
impeller and impeller nut. Before installing seal
bellows and spring assembly, lubricate the shaft
sleeve and rubber bellows with liquid soap or
clean grease and press bellows and spring
assembly onto the shaft sleeve. The spring
should engage the spring keeper at the impeller
end of the shaft sleeve.
To be properly positioned the washer must be
firmly against the rubber bellows member and
the driving lugs of the washer properly engaged.
The raised shoulder on the seal washer should be
facing away from the impeller to contact the
lapped surface of the seal seat in the adaptor.
Slide impeller and seal assembly into the
adaptor. Install drive clamp assembly on the
shaft sleeve but do not tighten.
Proceed with mounting instructions shown
under ( MOUNTING PUMPAK TO
DRIVER).
DRIVER REPAIRS:
1. Remove piping, install strip stock impeller
shim.
2. Remove four capscrews which fasten
adaptor to driver.
3. Loosen drive clamp assembly.
4. Remove PUMPAK.
After driver repairs, reinstall PUMPAK
according to instructions shown under
MOUNTING PUMPAK TO DRIVER.
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