not to
damage the pump cover. See Figure 5.
11. Remove pump cover from cast iron disc. (There
isn’t any hardware used to attach cover to disc.
Place cover on flat surface with convex side
down, and push out stationary member of
mechanical seal. It is not necessary to remove
cast iron disc from motor to replace seal.
12. Inspect shaft sleeve. If damaged or worn,
remove from shaft and replace.
B.) Reassembly:
CAUTION: The mechanical seal is a precision prod-
uct 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.
1.
Clean gasket and flange faces, seal seat cavity,
shaft sleeve, and motor shaft.
2.
Position cover so that the convex side is facing
you. Position the stationary seat with the silver-
dot down (away from you) and the lapped face
(shiny side) 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 a arbor press (if pos-
sible) and the cardboard disc supplied with the
seal. Be certain that the lapped face (shiny side)
is facing you.
3.
Install the flinger on the motor shaft until it
bottoms on the motor shaft.
4.
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 proce-
dure.
5.
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 holes in the cover. (There isn’t any
hardward required to attach cover to motor disc.)
6.
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 rub-
ber 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.
7.
Install the seal spring on the seal head and
retainer on spring.
8.
Place key in key seat. Line up keyway in impeller
with key on motor shaft, and slide impeller 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.
9.
Insert a screwdriver in a waterway passage of
the impeller holding it against rotation as dis-
cussed in paragraph 7 of the disassembly
instructions.
10. Remove any burrs caused by screwdriver on the
vane of impeller in waterway passage.
11. Install O-Ring on cover. Be sure that any dam-
aged O-ring is replaced.
12. Place pump casing against pump 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.
13. Finish tightening the cap screws alternately and
evenly to approximately 6 ft. lbs. torque. Note: It
is imperative that the screws be tightened alter-
nately 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.
14. Replace hold-down bolts.
15. Check for free rotation after assembly is com-
pleted.
16. Close all drain openings, using pipe sealant on
threads.
17. Reprime before starting. Do not start unit until
pump is completely filled with water.
The approved lubricating fluid for seal installation is
included with the mechanical seal or repair kit. DO
NOT USE OTHER LUBRICATING LIQUIDS!
Figure 5
Figure 4
