GORMAN-RUPP AMT 5760-95 Assembly instructions

Top View
Side View
Discharge

wire cover (Ref. No. 7).
2. Remove two fasteners
(Ref. No. 4) which hold
cord retainer (Ref. No. 3).
3. Remove fastener(s) (Ref.
No. 5) at handle (Ref.
No. 6) to free wire loom
(Ref. No. 2).
4. Remove four fasteners
(Ref. No. 8) which hold
wire cover in place.
5. Carefully pry cover from
unit with screwdriver.
IMPORTANT: Be careful to
keep rust and other debris
from falling into motor hous-
ing during cover removal.
6. Take note of proper wire
configuration, and con-
nect new power cord
(Ref. No. 1) in identical
fashion.
If unsure
about
above information or wiring
diagrams, consult an electri-
cian familiar with motor
wiring.
7. Clean sealing flanges if
necessary and reassemble
pump in reverse order.
IMPELLER INSPECTION /
REPLACEMENT
If pump develops poor per-
formance characteristics,
impeller may be worn or
clogged.
IMPELLER INSPECTION
Refer to Figure 3.
1. Place unit on workbench
in upright position and
clean rust and buildup
from around pump-to-
motor flange.
2. Remove four short fas-
teners (Ref. No. 15) which
attach pump to motor.
3. Lift motor assembly up
out of pump assembly
and lay on workbench in
horizontal position. Rap
down on pump body
Specifications Information and Repair Parts Manual
5760-95 thru 576E-95
2
Submersible Pumps
Shredder Series
Performance
GPM of Water at Total Head in Feet Max.
Model 5' 10' 20' 40' 60' 80' Head†
5760, 5761, 5762, 576B — 102 79 — — — 32 ft.
5763, 5764, 576C — 179 140 20 — — 43
5765, 5766, 576D — 209 175 100 — — 60
5767, 576E — 255 225 160 95 25 86
(†) Shutoff; to convert to psi, divide by 2.31
Specifications
Discharge Power Supply Max. Cord Basic Impeller Weight
Model Outlet ‡ HP @60 Hz Amps Length Construc. Material Seals (lbs.)
5760 2" 1 115VAC, 1 Phase 13.5 19.5' Cast Iron* Cast Iron Buna N 50
5761 2 1 230VAC, 1 Phase 6.0 19.5 Cast Iron* Cast Iron Buna N 50
5762 2 1 230VAC, 3 Phase 3.0 19.5 Cast Iron* Cast Iron Buna N 50
576B 2 1 460VAC, 3 Phase 1.5 19.5 Cast Iron* Cast Iron Buna N 50
5763 3 2 230VAC, 1 Phase 12.0 32 Cast Iron* Cast Iron Buna N 82
5764 3 2 230VAC, 3 Phase 6.0 32 Cast Iron* Cast Iron Buna N 68
576C 3 2 460VAC, 3 Phase 3.0 32 Cast Iron* Cast Iron Buna N 68
5765 4 3 230VAC, 1 Phase 16.0 32 Cast Iron* Cast Iron Buna N 120
5766 4 3 230VAC, 3 Phase 8.5 32 Cast Iron* Cast Iron Buna N 105
576D 4 3 460VAC, 3 Phase 4.3 32 Cast Iron* Cast Iron Buna N 105
5767 4 5 230VAC, 3 Phase 14.0 32 Cast Iron* Cast Iron Buna N 110
576E 4 5 460VAC, 3 Phase 7.0 32 Cast Iron* Cast Iron Buna N 110
NOTE: Driver data is subject to change without notice, see label on driver for actual specifications.
(‡) Standard NPT (female) pipe thread.
(*) With stainless steel, brass, and plastic components.
Maintenance
Make cer-
tain that
unit is disconnected from
power source before attempt-
ing to service or remove any
component.
POWER CORD REPLACE-
MENT
Periodically inspect power
cord and replace whenever
abrasion, cracking, softening,
or other signs of deteriora-
tion are found.
Refer to Figures 2 and 3.
1. Place unit on workbench
in upright position. Clean
dirt and rust from around
with soft mallet if neces-
sary to separate parts.

4. Inspect impeller (Ref.
No. 26). If clog is found,
remove debris and
reassemble in reverse
order. If damage to
impeller is found, such as
pitting, deep grooves, or
breakage, proceed to
next section.
IMPELLER REPLACEMENT
5. Remove impeller fastener
(Ref. No. 28) by unscrew-
ing in counterclockwise
direction.
NOTE: To prevent motor
shaft from turning, wedge a
screwdriver between impeller
vane and impeller fastener
(see Figure 2).
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 protect-
ed from contact with liquid
being pumped by a mechani-
cal shaft seal and oil cavity.
When seal wears out, poten-
tial motor life will be com-
promised. Therefore, periodic
seal replacement is recom-
mended. Time interval
between replacements will
depend on abrasiveness of
liquid being pumped, tem-
perature, 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 compo-
nents.
Refer to Figure 3.
1. Disassemble pump by fol-
lowing directions in both
“Power Cord
Replacement” and
“Impeller Inspection /
Replacement” sections.
2. With unit on its side and
wire cover, pump assem-
bly, and impeller
removed, lift shaft key
(Ref. No. 13) from
shaft/rotor (Ref. No. 12)
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 drained.
7. Remove three fasteners
(Ref. No. 25) and pry out
seal plate with screwdriv-
er. 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
also. Be sure to note size and
color of each before disas-
sembly so that new parts are
installed in proper orienta-
tion.
9. Remove upper seal seat
(Ref. No. 17) from lower
end bell by using a screw-
driver or dowel to press
on seal from rear. Do the
same for lower seal seat
Specifications Information and Repair Parts Manual
Models 5760-95 thru 576E
3
Figure 2 - Impeller Removal
(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
alight 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 a piece
of pipe or 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 han-
dled very carefully.)
(continued on page 8)
Screwdriver
Impeller
vane
Ratchet
Wrench

For Repair Parts, contact dealer where pump was purchased.
Please provide the following information:
-Model number
-Serial number (if any)
-Part description and number as shown in parts list
Specifications Information and Repair Parts Manual
5760-95 thru 576E-95
Figure 3 – Repair Parts Illustration 2&3 inch
4
17
18
19
20
21 25
22
23 24
26
27
28
29
30
31
32
33
5
6
4
1
2
37
8
10
9
11
12
14
15
13
16
29A

1
25
6
4
37
8
9
10
11
12
13 14
15
16
33
32
31
30
29
28
27
26
24
23
22
21
20
19
18
17
25
29A

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 seal seat
and use a press to seat
bearing back into lower
end bell.
17. Apply a light coating of
soapy water to inside
rubber portion 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 fasten-
ers.
19. Press slinger washer back
in place.
20. Refill cavity with oil
through fill hole and
reassemble in reverse
order.
Specifications Information and Repair Parts Manual
5760-95 thru 576E-95
Submersible Pumps
Shredder Series
8
Maintenance
(Continued)