Specifications Information and Repair Parts Manual
5771-95, 5773-95, 5777-95, 577A-95,
Submersible Pumps Contractor Series
577B-95, 577D-95, 577E-95
Figure 2 - Impeller Removal
6. Slide off impeller washer (Ref. No.
27). Impeller is keyed to motor
shaft and can now be pulled free.
7. Install replacement impeller and
reassemble in reverse order.
MECHANICAL SEAL
REPLACEMENT
Motor internals are protected from
contact with liquid being pumped by a
mechanical shaft seal and oil cavity.
When seal wears out, potential motor
life will be compromised. Therefore,
periodic seal replacement is
recommended. Time interval between
replacements will depend on
abrasiveness of liquid being pumped,
temperature, total accumulated
runtime, etc.
IMPORTANT:
Always replace seal
head (Ref. No. 18) and both seal seats
(Ref. Nos. 17 & 19) at same time to
insure proper mating of components.
Refer to Figure 3.
1. Disassemble pump by following
directions in both "Power Cord
Replacement" and "Impeller
Inspection/Replacement" sections.
2. With unit on its side and outer
shell, wire cover, pump assembly
and impeller removed, lift shaft
key (Ref. No. 13) from shaft using
a pliers.
3. Clean rust and buildup from unit.
4. From top of unit, remove four long
fasteners (Ref. No. 10) which
attach lower end bell (Ref. No. 16)
to motor case (Ref. No. 11).
5. Rap on ears of lower end bell with
a soft mallet to break it free from
motor case. Then carefully guide
lower end bell along with
shaft/rotor and bearing assembly
out of motor case.
6. Drain oil from seal cavity by
removing drain screw (Ref. No.
23) and seal (Ref. No. 22) from
seal plate (Ref. No. 21). Then tip
components upright overtop of a
catch pan until oil is drainer.
7. Remove three fasteners (Ref. No.
25) and pry out seal plate with
screwdriver. Slinger washer (Ref.
No. 24) will come free at this time.
8. Use a press or gear puller to
remove shaft and bearings from
lower end bell. Shaft seal head will
now be free.
IMPORTANT:
Shaft seal head (with
spring) has unique ends, and two seal
seats are different from one another.
Be sure to note size and color of each
before disassembly so that new parts
are installed in proper orientation.
9. Remove upper seal seat (Ref. No.
17) from lower end bell by using a
screwdriver or dowel to press on
seal from rear. Do the same for
lower seal seat (Ref. No. 19) in
seal plate.
10. Clean seal seat cavities before
inserting new seals.
11. Carefully wipe polished surface of
new seal seats with a clean cloth.
12. Wet outside of rubber portion of
seal seats with a light coating of
soapy water.
13. Press each new seal seat
squarely into cavity in both seal
plate and lower end bell. If seal
seat does not press squarely into
cavity, it can be adjusted into
place by pushing on it carefully
with apiece of pipe of dowel.
Always use a piece of cardboard
between pipe and seal seat to
avoid scratching seal seat (This is
a lapped surface and must be
handled very carefully).
14. After each seal seat is in place,
insure that it is clean and has not
been marred.
15. Using a clean cloth, wipe shaft
and make certain that it is
perfectly clean.
16. Carefully guide motor shaft
through sal seat and use a press
to seat bearing back into lower
end bell.
17. Apply a light coating of soapy
water to inside rubber potion of
seal head and slide onto shaft (be
sure to start correct end first).
18. Place seal plate back onto lower
end bell being careful to guide
shaft and avoid damage to seal
seat. Secure with fasteners.
19. Press slinger washer back in
place.
20. Refill cavity with oil through fill
hole and reassembly in reverse
order.
