Conair W1-1.5 User Manual page 99

10. Remove pump cover from cast iron disc.
(There is no hardware used to attach cover
to disc.) Place cover on a flat surface with
convex side down. Push out stationary
member of mechanical seal. It is not
necessary to remove the cast iron disc from
the motor to replace the seal.
B.) 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.
1. Clean gasket and flange faces, seal seat
cavity and shaft, in particular shaft shoulder
fitting against impeller.
2. Lubricate the seal seat cavity of the cover
and the rubber cup or O-ring of stationary
seal seat with the lubricating fluid that
comes with the mechanical seal or repair kit.
Press the stationary seat in seal seat cavity
in the cover squarely and evenly using a
arbor press (if possible) and the cardboard
disc supplied with the seal. Be certain that
the lapped face (shiny side) is facing you.
3. 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 the holes in the
cover. (Note: There isn't any hardware
required to attach the cover to the motor
disc.)
4. Apply the lubricating fluid that comes with
the mechanical seal or repair kit to the motor
shaft and the rubber bellows of the rotary
seal. Slide the seal head on the shaft, 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. Install seal spring on head
and seal spring retainer on spring. Do not
chip or scratch faces during installation.
Take extra care to make sure the lapped
faces are clean.
Figure 2
Figure 3
MECHANICAL SEAL REPLACEMENT
JM FRAME MOTOR
A.)
5. Hold shaft against rotation as described in
paragraph 8 of disassembly procedure, and
thread impeller on shaft until it is tight
against the shaft shoulder. The impeller will
compress the seal spring to the proper
length assuring correct pressure on lapped
faces.
6. Replace D-washer and impeller nut holding
impeller against rotation as indicated in
paragraph 7 of disassembly procedure
(2 & 3 HP 1PH, and all 3PH motors only).
7. Remove any burrs caused by screwdriver on
the vane of impeller in waterway passage.
8. Replace motor and rotating element in
casing. Be sure that any damaged O-ring is
replaced.
9. 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 motor disc. Tighten all cap
screws alternately and evenly until finger
tight.
10. Finish tightening the cap screws
alternately and evenly to approximately 20
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 and adapter may
occur if the cap screws are not tightened as
listed above.
11. Replace hold-down bolts.
12. Check for free rotation after assembly is
completed.
13. Replace motor shaft end cap.
14. Seal all drain openings using pipe sealant
on threads.
15. Reprime before starting. Do not start until
pump is completely filled with water.
Disassembly:
1. Turn off power.
2. Close suction and discharge valves.
3. Drain pump.
4. Remove bolts holding down pump to
mounting plate.
5. Remove casing bolts.
6. Remove motor and rotating element
from casing, leaving casing and piping
undisturbed.
7. Insert a screwdriver in one of the impeller
waterway passages and back off the
impeller retaining assembly with a
socket wrench, as shown in Figure 4.
Figure 4