5730-250-00
2
6/2016
Specifications Information and Repair Parts Manual
573X and 574X Series
x
Patterson/AMT Inline Circulator Pump
SHAFT SEAL REPLACEMENT
Refer to Figure No. 2 for part identification. Order Ref. No. 13A to
replace all seals and o-rings.
REMOVAL OF OLD SEAL
IMPORTANT:
Always replace both seal seat (Ref. No. 10) and seal
head (Ref. No. 11) to ensure proper mating of components. Also,
impeller seal (Ref. No. 13) should be replaced anytime impeller
fastener (Ref. No. 14) has been removed.
1.
Remove fasteners (Ref. No. 5) connecting casing (Ref. No.
15) to adapter (Ref. No. 7).
2.
Slide casing off of adapter locating boss. Take care when
removing casing, it may be heavy.
Care should be taken not to pinch or “shave” casing o-ring (Ref.
No. 9) between seal plate (Ref. No. 8) and casing.
3.
Use a box wrench and/or socket wrench to remove impeller
fastener. Remove impeller seal and impeller (Ref. No. 12).
NOTE:
Stub shaft must be held in place to remove impeller. Insert a
hex key through adapter opening into one of the screws fastening
shaft clamp (Ref. No. 2) to motor/stub shaft. Brace hex key against
side of adapter opening. Impeller and impeller fastener unscrew CCW
when looking at the impeller eye.
4.
Disconnect any piping or venting apparatus attached to seal
plate 1/8” NPT wash/vent port.
5.
The seal head can now be pulled from shaft. Remove seal
plate (Ref. No. 8) from adapter.
6.
Pry seal seat from cavity in seal plate.
INSTALLATION OF NEW SEAL
The precision lapped faces of mechanical seal are easily
damaged. To prevent leaks, handle replacement seal carefully.
Do not touch seal mating faces.
IMPORTANT:
Be sure that shaft does not damage polished seal
faces.
1.
Thoroughly clean all surfaces of seal cavity in seal plate.
2.
Using clean cloth, wipe shaft and make certain that it is
perfectly clean.
3.
Wet rubber portion of new seal with a light coating of soapy
water. While wearing clean gloves or using a clean rag,
press seal seat squarely into seal place seal cavity. Use
cardboard washer (usually supplied with new seal), place
over polished seal surface and use a piece of pipe or dol
rod to press seat in firmly but gently. Avoid scratching
polished face.
4.
Dispose of cardboard washer. Check again to see that
polished face is free of dirt and all other foreign particles
and that it has not been scratched or damaged.
5.
Install seal plate onto shaft and seat against adapter. Align
1/8” NPPT seal wash port if port is being used.
6.
Wet inside rubber portion of new seal head with a light
coating of soapy water. Slide head onto motor shaft with
sealing surface facing seal seat.
NOTE:
A short “run-in” period may be necessary to provide
completely leak-free operation.
7.
Screw impeller onto shaft. Hold stub shaft with hex key
when tightening impeller and impeller fastener.
8.
Check if shaft turns freely by spinning impeller.
9.
Slide impeller seal onto exposed shaft, screw impeller
fastener onto shaft with thread sealant applied (Vibra-Tite
(12150) Threadlocker Medium Strength Removable) and
tighten.
NOTE: Proper motor support is required to avoid damage to pump
or motor. Use correct size motor hanger similar to the one pictured
based on model being installed. Hangers vary depending on
horizontal or vertical installation (see figure 1).
INSTALLING FLANGES
1.
Included with pump: (2) 3” NPT flanges, 2 gaskets, and 4
bolts, nuts, and washers.
2.
Install flanges on piping using sealing tape or pipe sealant.
3.
Insert gasket into machined groove on pump flange.
4.
Position pump by lining up bolt holes on pump flange with bolt
holes on pipe flange.
5.
Install 4 hex head bolts, nuts, and washers with thread
sealant (Vibra-Tite (12150) Threadlocker Medium Strength
Removable).
6.
Torque both flange bolts in even increments to a value of 8-
11 ft-lbs (1.1-1.5 Kg-m). Torque the bolts in both the suction
and discharge flanges in this manner.
OPERATION
1.
Prior to pump start up, be sure system is clean and filled with
clean liquid that is compatible with pump components.
2.
Pressure the pump body slowly. Check for leaks at the flange
joint, the pump casing and motor shaft.
Pressurize pump casing slowly. Failure to check for leaks at all
joints sealed with a gasket may result in personal injury or
property damage. Installation of a collection pan and/or drain is
required to prevent property damage from system leaks.
3.
DO NOT RUN PUMP DRY!
Mechanical shaft seal damage
will occur if pump is run dry. Pump body must be filled with
liquid before starting motor. Air must be vented from the
system by means of an air vent located at a high point in the
system.
MAINTENANCE
Make certain that the unit is disconnected and locked out from the
power source before attempting to service or remove any
components.
1.
System must be drained or pump isolated by turning off
suction and discharge valves before attempting to remove
pump.
Water t
emperature in system cannot exceed 90̊ F (32̊ C) before
removing or servicing pump. If draining system, leave drain valve
open during servicing.
Pump surface temperature cannot exceed
90̊ F (32̊ C) before
removing or servicing pump.
Loosen flange bolts slightly and shift pump side to side to vent
internal pump casing pressure before removing or servicing pump.
2.
Remove pump from the system by removing eight flange
mounting bolts, nuts and washers (Ref. Nos. 18 & 19).
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