GORMAN-RUPP AMT 576B-95 Manual

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Specifications Information and Repair Parts Manual
Please read and save this Repair Parts Manual. Read this manual and the General Operating Instructions carefully before attempting to assemble, install, operate
or maintain the product described. Protect yourself and others 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. AMT reserves the right to discontinue any model or change specifications at any time without incurring any obligation.
©2015 AMT Pump Company, A Subsidiary of The Gorman-Rupp Company, All Rights Reserved.
Periodic maintenance and inspection is required on all pumps to ensure proper operation. Unit must be clear of debris and sediment. Inspect for leaks and loose bolts. Failure to do so
voids warranty.
Submersible Shredder Pumps
Refer to pump manual 1808-636-00 for General Operating and Safety Instructions.

DESCRIPTION

These heavy duty centrifugal Submersible Shredder Pumps are intended for use in residential, commercial, and industrial settings. Examples include: sewage,
wastewater and other general processing applications involving dirty liquids with small solids. Submersible design means low noise and no priming issues.
Each unit is completely assembled and includes a self-cleaning, semi-open cast iron impeller featuring a tungsten carbide cutting tip for durability while helping
to break up solids. Pumps incorporate a mechanical shaft seal with long lasting silicon carbide wear faces and feature a secondary shaft seal and oil chamber.
Pumps have a 3450 RPM electric motor fitted with an unfinished power cord that requires field wiring (no controls are supplied). Motors are rated continuous duty
and single phase units have automatic restart thermal overload protection. Handle liquids from 40° to 104° F (4° to 40° C). For use with non-flammable liquids
compatible with pump component materials.

MAINTENANCE

Make certain that unit is disconnected from power source before
attempting to service or remove any components!

POWER CORD REPLACEMENT

Periodically inspect power cord and replace whenever abrasion, cracking,
softening or other signs of deterioration are found.
Refer to Figures 1 and 2.
1. Place unit on workbench in upright position. Clean dirt and rust from
around 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
housing during cover removal.
6. Take note of proper wire configuration, and connect new power cord (Ref.
No. 1) in identical fashion.
If unsure about above information or wiring diagrams, consult an
electrician familiar with motor wiring.
7. Clean sealing flanges if necessary and reassemble pump in reverse
order.
IMPELLER INSPECTION /REPLACEMENT
If pump develops poor performance characteristics, impeller may be worn or
clogged.
5760-250-00
AMT Pumps 576B-95

IMPELLER INSPECTION

Refer to Figure 2
1. Place unit on workbench in upright position and clean rust and buildup
from around pump-to-motor flange.
2. Remove four short fasteners (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 with soft mallet, if necessary,
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

1. Remove impeller fastener (Ref. No. 28) by unscrewing in counterclockwise
direction.
NOTE: To prevent motor shaft from turning, wedge a screwdriver between
impeller vane and impeller fastener (see Figure 1).
2. Slide off impeller washer (Ref. No. 27). Impeller is keyed to motor shaft
and can now be pulled free.
3. 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 ensure proper mating of components.
Refer to Figure 2
1. Disassemble pump by following directions in both "Power Cord
Replacement" and "Impeller Inspection / Replacement" sections.
1
5760-95 thru 576E-95
6/2015