AMT 5790-95 Assembly instructions

Submersible Pumps
Drainage / Sump Series
Specifications Information and 5780-98, 5790-95, 5792-95,
Repair Parts Manual 5800-99, 5810-99 and 5811-99
Please read and save this Repair Parts Manual. Read this manual and the General Operating Instructions careful-
ly before attempting to assemble, install, operate or maintain the product described. Protect yourself and oth-
ers by observing all safety information. The Safety Instructions are contained in the General Operating
Instructions. Failure to comply with the safety instructions accompanying this product could result in personal
injury and/or property damage! Retain instructions for future reference.
5780-250-00 03/2005
Refer to form 1808-636-00 for General Operating and Safety Instructions.
Description
These general purpose centrifugal Submersible Drainage /
Sump Pumps are intended for use in residential, commercial,
and industrial settings. Examples include: Basements, boats,
tanks, and other general drainage applications involving
clean liquids. Submersible design means low noise and no
priming issues.
Each unit is completely assembled and features a self-clean-
ing semi-open impeller and automatic on/off float switch
(stainless steel unit has no switch). All pumps incorporate a
mechanical shaft seal with carbon and ceramic wear faces.
Cast iron and SS pumps also feature a secondary shaft seal
and oil chamber.
Pumps have a 3450 RPM electric motor fitted with a finished
3-prong grounding type power cord. Motors are rated con-
tinuous duty and have automatic restart thermal overload
protection. Handle liquids from 40° to 104° F (4° to 40° C).
For use with clean, clear water and other non-flammable,
non-abrasive liquids compatible with pump component
materials.
Performance
GPM of Water at Total Head in Feet Max.
Model 5' 10' 15' 20' 25' 30' Head†
5800-99 15 7 — — — — 14 ft.
5810-99 25 13 — — — — 14
5811-99 41 30 18 3 — — 21
5790-95 52 46 40 31 18 — 30
5792-95 62 57 50 42 34 22 37
5780-98 56 50 43 34 21 6 32
(†) 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 Const. Material Seals (lbs.)
5800-99 1" HB 1/8 115VAC, 1 Phase 1.5 13' Plastic* Plastic Buna N 11
5810-99 11/4HB 1/3 115VAC, 1 Phase 3.0 13 Plastic* Plastic Buna N 13
5811-99 11/2HB 1/2 115VAC, 1 Phase 4.9 13 Plastic* Plastic Buna N 15
5790-95 11/2NPT 1/3 115VAC, 1 Phase 4.2 20 Cast Iron** Cast Iron Buna N 35
5792-95 2 NPT 1/2 115VAC, 1 Phase 6.9 20 Cast Iron** Cast Iron Buna N 42
5780-98 2 NPT 1/2 115VAC, 1 Phase 5.0 20 SS*** SS Viton 26
NOTE: Driver data is subject to change without notice, see label on driver for actual specifications.
(HB) Male Hose Barb; (NPT) Standard NPT (female) pipe thread; (SS) 304 Stainless Steel
(*) With stainless steel, brass, and plastic components.
(**) With stainless steel, brass, plastic, and plated steel components.
(***) With stainless steel and plastic components.

2
Specifications Information and Repair Parts Manual
5780-98, 5790-95, 5792-95,
5800-99, 5810-99 and 5811-99
Dimensions (Inches)
W (Minimum Max.
Model Discharge A B CP OP liquid height) Z On Off solid
5800-99 1" HB 5.67 N/A 9.65 9.19 1.97 1.44 13.78 3.94 0.13
5810-99 11/4" HB 6.26 9.21 11.54 4.53 3.11 5.39 16.14 3.35 0.50
5811-99 11/2" HB 6.26 9.42 12.60 4.61 4.17 5.46 17.20 4.41 0.50
5790-95 11/2" NPT 6.31 8.75 13.78 3.88 3.15 4.33 15.75 3.35 0.25
5792-95 2" NPT 7.48 10.04 15.25 4.00 3.35 4.72 17.72 3.54 0.25
5780-98 2" NPT 5.63 8.19 15.00 4.00 3.15 4.00 N/A N/A 0.19
(N/A) Not applicable
(HB) Male Hose Barb
(NPT) Standard NPT (female) pipe thread.
NOTE: Dimensions have a tolerance of ± 1/8"
Model 5800-99 Model 5810-99 & 5811-99 Model 5790-95 & 5792-95 Model 5780-98
A
Discharge
Discharge
Discharge
Discharge
AAA
ZZ
Z
BB
B
Z
OP
OP
OP
OP
CP CP CP
CP
W
WWW
Off Off Off
On
On On
Figure 1 - Dimensions

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
wire cover (Ref. No. 10).
2. Remove two fasteners
(Ref. No. 2) which hold
cord retainer (Ref. No. 3).
3. Remove fastener (Ref.
No. 9) that attaches float
switch (Ref. No 5).
4. Remove fastener(s) (Ref.
No. 4) at handle (Ref.
No. 7) to free wire loom
(Ref. No. 6).
5. Remove four fasteners
(Ref. No. 8) which hold
wire cover in place.
6. 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.
7. Take note of proper wire
configuration, and con-
nect new power
cord/float (Ref. No. 1) in
identical fashion.
If unsure
about
above information or wiring
diagrams, consult an electri-
cian familiar with motor
wiring.
8. Clean sealing flanges if
necessary and reassemble
pump in reverse order.
IMPELLER INSPECTION /
REPLACEMENT (MODELS
5790-95, 5792-95 AND
5780-98 ONLY)
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 horizontal position
and clean rust and
buildup from around
pump-to-motor flange.
2. Remove three fasteners
(Ref. No. 29) to free
screen (Ref. No. 28).
3. Remove three fasteners
(Ref. No. 30) and use
screwdriver to pry base
(Ref. No. 27) from pump
assembly.
4. Inspect impeller (Ref.
No. 24). 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. 26) 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. 25). Impeller is
keyed to motor
shaft/rotor (Ref. No. 13)
and can now be pulled
free.
7. Install replacement
impeller and reassemble
in reverse order.
MECHANICAL SEAL
REPLACEMENT (MODELS
5790-95, 5792-95 AND
5780-98 ONLY)
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-
Specifications Information and Repair Parts Manual
Models 5780-98, 5790-95, 5792-95,
5800-99, 5810-99 and 5811-99
3
Figure 2 - Impeller Removal
Screwdriver
Rachet
Wrench
Impeller
vane

Specifications Information and Repair Parts Manual 5780-98, 5790-95, 5792-95,
5800-99, 5810-99 and 5811-99
4
2
1
9
10
13
29
12
11
28
26
25
27
24
23
22
21
19
18
17
20 8
14
7
6
5
16
30
15
4
3
Figure 3 - Repair Parts Illustration
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 5780-98, 5790-95, 5792-95,
5800-99, 5810-99 and 5811-99
5
Repair Parts List
Part Number For Models:.
Ref. 11/2-Inch - 1/3HP 2-Inch - 1/2HP 2-Inch - 1/2HP
No. Description 5790-95 5792-95 5780-98 Qty.
1 ~ Power cord/float kit 5790-350-90 5792-350-90 5780-350-90 1
2 Fastener (see Ref. No. 1) (see Ref. No. 1) (see Ref. No. 1) 2
3 Retainer (see Ref. No. 1) (see Ref. No. 1) (see Ref. No. 1) 1
4 Fastener * * * 2
5 Float switch (see Ref. No. 1) (see Ref. No. 1) (see Ref. No. 1) 1
6 Wire loom (see Ref. No. 1) (see Ref. No. 1) (see Ref. No. 1) 2
7 Handle kit 5790-100-90 5792-100-90 5780-100-90 1
8 Fastener * * * 4
9 Fastener (see Ref. No. 1) (see Ref. No. 1) (see Ref. No. 1) 1
10 Wire cover — — — —
11 Seal (see Ref. No. 32) (see Ref. No. 32) (see Ref. No. 32) 1
12 Upper end bell — — — —
13 Shaft/rotor — — — —
14 Shaft key — — — —
15 Drain plug — — — —
16 Motor case — — — —
17 Upper seal seat (see Ref. No. 32) (see Ref. No. 32) (see Ref. No. 32) 1
18 Seal head (see Ref. No. 32) (see Ref. No. 32) (see Ref. No. 32) 1
19 Lower seal seat (see Ref. No. 32) (see Ref. No. 32) (see Ref. No. 32) 1
20 Seal (see Ref. No. 32) (see Ref. No. 32) (see Ref. No. 32) 1
21 Casing kit 5790-001-95 5792-001-95 5780-001-98 1
22 Fastener (see Ref. No. 21) (see Ref. No. 21) (see Ref. No. 21) 3
23 Seal (see Ref. No. 32) (see Ref. No. 32) (see Ref. No. 32) 1
24 Impeller (see Ref. No. 31) (see Ref. No. 31) (see Ref. No. 31) 1
25 Impeller washer (see Ref. No. 31) (see Ref. No. 31) (see Ref. No. 31) 1
26 Impeller fastener (see Ref. No. 31) (see Ref. No. 31) (see Ref. No. 31) 1
27 Base (see Ref. No. 31) (see Ref. No. 31) (see Ref. No. 31) 1
28 Strainer kit 5790-170-90 5792-170-90 5780-170-90 1
29 Fastener (see Ref. No. 28) (see Ref. No. 28) (see Ref. No. 28) 3
30 Fastener (see Ref. No. 31) (see Ref. No. 31) (see Ref. No. 31) 3
31 ¤ Wearplate and impeller kit 5790-010-90 5792-010-90 5780-010-90 1
32 ‡ Seal kit 5790-300-90 5792-300-90 5780-300-90 1
(—) Not available
(*) Standard hardware item, available locally
(~) Power cord/float kit includes Ref. Nos. 1, 2, 3, 5, 6
(¤) Not shown. Wearplate and impeller kit includes Ref. Nos. 24, 25, 26, 27
(‡) Not shown. Seal kit includes Ref. Nos. 11, 17, 18, 19, 20, 23
Repair Parts List
Part Number For Models:.
Ref. 1-Inch - 1/8HP 11/4-Inch - 1/3HP 11/4-Inch - 1/2HP
No. Description 5800-99 5810-99 5811-99 Qty.
1 ~ Power cord/float kit 5800-350-90 5810-350-90 5811-350-90 1
NOTE: Power cord/float kit is the only repair part available for models 5800-99, 5810-99, and
5811-99.

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 it’s side and
wire cover, pump assem-
bly, and impeller
removed, lift shaft key
(Ref. No. 14) from
shaft/rotor (Ref. No. 13)
using a pliers.
3. Clean rust and buildup
from unit.
4. Drain oil from seal cavity
by removing drain plug
(Ref. No. 15) from motor
case (Ref. No. 16). Then
tip components overtop
of a catch pan until oil is
drained.
5. Remove three fasteners
(Ref. No. 22) which attach
casing (Ref. No. 21) to
motor case and pry two
components apart with
screwdriver.
6. Press on end of motor
shaft to separate from
motor case. Then careful-
ly guide upper end bell
(Ref. No. 12) along with
shaft/rotor and bearing
assembly out of motor
case. Shaft seal head will
now be free.
IMPORTANT: Shaft seal head
(with spring) may have
unique ends, and two seal
seats may be different from
one another also. Be sure to
note size and color of each
before disassembly so that
new parts are installed in
proper orientation.
7. Remove upper seal seat
(Ref. No. 17) from motor
case by using a screwdriv-
er or dowel to press on
seal from rear. Do the
same for lower seal seat
(Ref. No. 19) in casing.
8. Clean seal seat cavities
before inserting new
seals.
9. Carefully wipe polished
surface of new seal seats
with a clean cloth.
10. Wet outside of rubber
portion of seal seats with
a light coating of soapy
water.
11. Press each new seal seat
squarely into cavity in
both motor case and cas-
ing. 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.)
12. After each seal seat is in
place, insure that it is
clean and has not been
marred.
13. Using a clean cloth, wipe
shaft and make certain
that it is perfectly clean.
14. Carefully guide motor
shaft through seal seat
and use a press to seat
bearing back into motor
case.
15. 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).
16. Place casing back onto
motor housing being
careful to guide shaft
and avoid damage to seal
seat. Secure with
fasteners.
17. Press lip seal back in
place.
18. Refill cavity with oil
through fill hole and
reassemble in reverse
order.
Specifications Information and Repair Parts Manual 5780-98, 5790-95, 5792-95,
5800-99, 5810-99 and 5811-99
Submersible Pumps
Drainage / Sump Series
6
Maintenance
(Continued)