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Specifications Information and Repair Parts Manual

547X, 548X & 549X Series

5470-250-00

1/2020

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.

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.

Stainless Steel Straight

Centrifugal Pumps

Refer to pump manual 1808-634-00 for General Operating and Safety Instructions.

ASSEMBLY

MOTOR (FOR UNITS SHIPPED WITHOUT DRIVER ONLY)

(Refer to Figure 1)

If any parts are missing or damaged, do not attempt to assemble or
operate pump until repair parts are obtained and properly installed.

Verify that motor conforms to ALL standards specified in “Description”,

and is equipped with slinger washer not included with pump.

2. Place motor in vertical position with shaft end up. Set adapter (Ref. No.

2) on top of motor.

NOTE:

Be sure to align adapter in desired position now. Rotating adapter

allows pump discharge port to be positioned at various angles.
3.

See “INSTALLATION OF NEW SEAL” under “Maintenance” section and

follow steps to complete assembly of pump.

MAINTENANCE

Make certain that unit is disconnected from power source

before attempting to service or remove any components!

SHAFT SEAL REPLACEMENT

(Refer to Figure 1)

REMOVAL OF OLD SHAFT SEAL

Disconnect power supply and piping.

2. Place unit in vertical position with pump end up.
3.

Disassemble pump by removing fasteners and washers (Ref. Nos. 10 &
11) which holds casing (Ref. No. 9) in place. Lift off casing and casing seal

(Ref. No. 5).

4. Unscrew impeller nut (Ref. No. 8), and impeller (Ref. No. 6) separately by

turning each counterclockwise. Impeller seal (Ref. No. 7) will also be freed
at this time. If seal head (Ref. No. 4 with spring) is retained on impeller,
separate at this time.

NOTE:

It may be necessary to use a soft hammer to tap outside of impeller in

a counterclockwise direction to loosen it.

NOTE:

Access to motor shaft is provided at end opposite pump (plug may need

to be pried out or cover removed). Use screwdriver in slot or wrench on flats to

keep motor shaft from turning.
5.

Lift off casing cover (Ref. No. 3) while pulling seal along with it. Seal seat

(without spring) can now be freed by pressing through from rear of casing
cover.

IMPORTANT: Do not damage motor shaft, impeller stem or seal cavity in casing

cover as this may cause leaks.

DESCRIPTION

AMT Stainless Steel Solids Handling End Suction Centrifugal pumps are designed for continuous duty high flow and high pressure applications including:

chemical processing, liquid transfer, pressure boosting, circulating, dirty water. Constructed of rugged deep drawn stainless steel for durability and corrosion

resistance. Investment cast stainless steel closed impeller for enhanced performance, and handles a maximum of 1/8” diameter solids. Handle liquids from 40̊
to 200̊ F (4̊ to 93̊ C) with standard Viton seals; 40̊ to 180̊ F (4̊ to 82̊ C) with optional Buna-N seals. Wetted parts include: Stainless Steel impeller and impeller
nut; Stainless Steel casing and casing cover; Type 21 mechanical shaft seal comprised of carbon, ceramic and stainless steel components; and Viton seals
(Buna-N seals Optional). High head units also include wetted Stainless Steel motor shaft. The discharge port on all models can be rotated 360̊ in 90̊ increments
to accommodate specific applications.

Motorized units are direct coupled to a 3450 RPM motor (see “Specifications” for additional motor data). Single phase pump motors have automatic reset thermal
protection. All models are manual mode and require field wiring, no controls are supplied. Check motor wiring before putting unit into operation (see motors
nameplate for specific wiring diagram).