26
Reassembly:
Caution: The mechanical seal is a precision product and should be handled accordingly.
Use care when handling lapped running surfaces of the mechanical seal to ensure they
remain clean and are free of chips or scratches.
Clean gasket and flange faces, seal seat cavity, shaft sleeve, and motor shaft.
Lubricate the seal seat cavity of the adapter and the rubber cup or O-ring of seal seat with
the lubricating fluid that comes with the mechanical seal or repair kit.
Press the stationary seat in seal seat cavity of the adapter squarely and evenly using an
arbor press (if possible) and the cardboard disc supplied with the seal. Be certain that the
lapped face (shiny side) is facing you.
Install the flinger on the motor shaft until it bottoms on the motor shaft.
Slide the shaft O-ring on the motor shaft until it is tight against the flinger. Make sure that
the shaft O-ring does not get damaged during this procedure.
Position shaft sleeve chamfer toward motor and slide on motor shaft.
With motor preferably in vertical position, remount the adapter on motor, making sure the
motor shaft does not dislocate or chip the stationery seat of the seal.
Apply the lubricating fluid that comes with the mechanical seal or repair kit to the stub shaft
and the rubber bellows of the rotary seal. Slide the seal head on the stub; press the rubber
drive band on the rotary head until the lapped face the head seats firmly against the lapped
face of the stationary seat. Do not chip or scratch faces during installation. Take extra care
to make sure the lapped faces are clean. Install seal spring on seal head and retainer on
spring.
Place key in key seat. Line up keyway in impeller with key on stub shaft, and slide impeller
on stub shaft. Be certain that the key is positioned in the keyway of the stub and impeller.
Slightly compress seal spring with impeller and hold impeller while installing impeller
retainer assembly in stub shaft.
Insert a screwdriver in a waterway passage of the impeller holding it against rotation and
tighten the retaining assembly as discussed in step 7 of disassembly instructions. The
impeller will compress the seal spring to the proper length assuring the correct pressure on
the lapped surfaces.
Remove any burrs caused by screwdriver on the vane of impeller in waterway passage.
Slide motor and rotating element in casing. Be sure that any damaged O-ring or gasket is
replaced.
Tighten casing bolts alternately and evenly.
Replace hold-down bolts.
Check for free rotation after assembly is completed.
Seal all drain openings using pipe sealant on threads.
Re-prime before starting. Do not start until pump is completely filled with water.
Содержание Duratherm
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