19
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.
Position cover so that the convex side is facing you. Lubricate the seal seat cavity of the
cover 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 cover
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 the cover so that the convex side with the lapped seal seat is facing you. Place the
cover on the motor disc and align the holes in the disc with hoes in the over. (There isn’t
any hardware required attach cover to motor disc.)
Apply the lubricating fluid that comes with the mechanical seal or repair kit to the motor
sleeve and the rubber bellows of the rotary seal. Slide the seal head on the shaft sleeve;
press the rubber drive band on the rotary head until the lapped face on 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 the seal spring on the seal head and retainer on spring.
Place key in key seat. Line up keyway in impeller with key on motor shaft. Be certain that
the key is positioned in the keyway of the motor and impeller. Slightly compress seal spring
with impeller and hold impeller while installing impeller retaining assembly in motor shaft.
Insert a screwdriver in a waterway passage of the impeller holding it against rotation as
discussed in Paragraph g of the disassembly instructions.
Remove any burrs caused by screwdriver on the vane of impeller in waterway passage.
Install O-ring on cover. Be sure that any damaged O-ring is replaced.
Place pump casing against pup cover. Ensure that impeller eye is centered in pump case
and position case, cover and motor disc so that the holes line up. Install socket head cap
screws through the case and cover, and thread into the motor disc. Tighten all cap screws
alternately and evenly until finger tight.
Finish tightening the cap screws alternately and evenly to approximately 6 ft. lbs. torque.
Note: It is imperative that the screws be tightened alternately and evenly, as this action
centers the cover in the casing, assuring proper alignment. Binding of the impeller in the
case may occur if the case is not positioned properly and/or the cap screws are not
tightened as listed above.
Replace hold-down bolts.
Check for free rotation after assembly is completed.
Close 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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