GORMAN-RUPP Patterson PM1 Series Assembly instructions

Specifications Information and Repair Parts Manual
Multistage
Vertical Inline Pumps
PM1, PM3, PM5 Series
Patterson Pump Company
A Gorman-Rupp Company
2129 Ayersville Rd.
Toccoa, Georgia 30577
[phone]
www.pattersonpumps.com
5910-250-00 08/2016

Installation
MOUNTING
Preferred mounting position is with
motor shaft aligned vertically (See
Figure 1).
1. Choose a solid, level surface with
adequate support such as a concrete
slab floor.
2. Use a level against pump to
check for plumb. For uneven
surfaces, shim beneath feet
of Casing(Ref. No. 38) to
attain proper alignment.
3. Securely fasten Casing to
mount surface at all four
mount holes to avoid tip-over
of pump. If space limitations dictate,
pump may also be mounted
horizontally if adequate support is
provided. Do NOT mount motor end
down or with shaft centerline below
horizontal plane.
PIPING
Pump may have a protective cover over
inlet and outlet for shipping purposes. If
present, be sure to remove these covers
prior to attaching piping. If flange
Screws (Ref. No. 41) are loosened, be
sure to re-tighten evenly and torque to
33 ft-lbs [45 N-m] to avoid Gasket (Ref.
No. 39) failure.
Starving the pump of liquid could cause
low performance and damage to pump
and seal. To avoid this, use suction
piping that is short and either matches
pump port diameter or is larger, do not
reduce. Also, immediately preceding
pump inlet, provide a section of straight
pipe equal in length to a minimum 4
diameters of pipe size and avoid using
valves.
5910-250-00 03/2012
Description
APPLICATIONS
These commercial/industrial centrifugal pumps are non-self-priming (gravity feed)
units designed to handle high-pressure/low-flow liquid transfer applications where no
suction lift is required. Typical installations include hot and chilled water, boiler feed,
condensate return, irrigation, high pressure wash-down, booster service, and
sprinkler systems. These pumps have NOT been investigated for use in potable
(drinking) water systems.
FEATURES
The in-line port design and compact footprint of these pumps allows for a clean
installation. All models feature a shaft seal that can be replaced easily without the
need to disassemble the entire pump. An optional ANSI/ASME flange kit is available.
Pumps are equipped with high efficiency closed impellers, and have a casing working
pressure to 536 ft./232 psi [1600 kPa]. Handle liquid temperatures from 40° F to
180° F [4° to 82° C]. For use with clear, nonabrasive, nonflammable liquids
compatible with pump component materials.
MOTOR
A
ll models have 3450 RPM (2850 RPM for 50 Hz) continuous duty TEFC motors.
Single phase units are capacitor start and have automatic reset thermal protection. All
models are manual mode and require field wiring, no controls are supplied.
Motors have multi-voltage options. To avoid damage to motor,
be sure to arrange internal motor wiring to match electric supply voltage before
applying power (see motor nameplate for specific wiring diagram).
PUMP CONSTRUCTION
Pump construction is cast iron casing and adapter; 304 stainless steel impellers,
chambers and column; Teflon®wear rings; 304L stainless steel pump shaft with
tungsten carbide sleeve bearings; EPDM o-rings and gaskets; a mechanical shaft seal
of stainless steel, carbon graphite, and tungsten carbide wear faces.
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.
®2009 American Machine & Tool Co., Inc. of PA, A Subsidiary of The Gorman-Rupp Company, All Rights Reserved.
Periodic maintenance and inspection are required on all pumps to insure proper operation. Units must be free of debris and
sediment. Inspect for leaks and loose bolts. Failure to do so voids warranty.
Multistage Centrifugal Pumps
Vertical Inline Models
Refer to form 1808-634-00 for General Operating and Safety Instructions
Specifications Information and Repair Parts Manual PM1, PM3 and PM5 Series
Preferred Mounting Alternative Mounting
Figure 1 - Mounting

Installation (Continued)
These pumps develop very high
pressures. Be sure to confirm that
pressure rating of all piping and fittings
is adequately sized before use. Rating
must be sufficiently larger than the
combination of both inlet pressure plus
the maximum pressure pump can
develop.
Piping and/or
pipe fittings with
an insufficient pressure rating may burst
and cause personal injury and/or
property damage.
MAXIMUM INLET PRESSURE
“1” Series
2 to 25........335 ft./145 psi [1000 kPa]
27 stage......500 ft./217 psi [1500 kPa]
“3” Series
2 to 15........335 ft./145 psi [1000 kPa]
17 to 25 ......500 ft./217 psi [1500 kPa]
“5” Series
2 to 9..........335 ft./145 psi [1000 kPa]
10 to 29 ......500 ft./217 psi [1500 kPa]
If system pressure has potential to
exceed number listed above, then a
check valve is required on discharge side
of pump. This will ensure that proper
inlet pressure is maintained when pump
shuts off.
MAXIMUM OUTLET PRESSURE
If system pressure in excess of
536 ft./232 psi [1600 kPa] is possible,
then it is necessary to provide means to
prevent this. Examples include a bypass
valve or pressure switch on discharge of
pump set at or below this number.
Operation
Become familiar with pump components
(See Figure 3).
Vent Plug (Ref. No. 13) – Used to purge
air from pump.
Wash Plug (Ref. No. 11) – Used in
applications where seal wash is
desired to extend life of shaft seal.
Bypass Valve (Ref. No. 42) – Connects
suction and discharge sides of pump,
making filling/draining procedure
easier. During operation, bypass
valve must be closed.
PM1, PM3, and PM5 Series
Multistage Centrifugal Pumps
Vertical Inline Models
Specifications Information and Repair Parts Manual PM1, PM3, and PM5 Series
Multistage Centrifugal Pumps
Vertical Inline Models
Dimensions Inches [cm]
“
1” Series 1” NPT 1” NPT 1/2 thru 3 8 gpm [30 lpm]
“
3” Series 1” NPT 1” NPT 1 thru 5 16 gpm [61 lpm]
“
5” Series 1¼” NPT 1¼” NPT 2 thru 7½ 30 gpm [114 lpm]
NOTE: All dimensions have a tolerance of ±1/8” [0.3].
(*) Standard NPT (female) pipe thread.
Model Suction* Discharge* HP Nominal Flow
2
Figure 2 - Dimensions

Fi
g
ure 3 - Components
Operation (Continued)
Never run pump
dry or with flow
shutoff. When pump is running, always
maintain a minimum flow of 4 gpm
[0.9 m
3
/h] to avoid damage to pump.
STARTUP PROCEDURE
To avoid pump
damage, it is very
important to purge all air from pump
before initial startup.
1. Close discharge valve if present.
2. Permit liquid to flow into pump thru
suction port by gravity.
3. Allow air to escape from pump by
cracking open Vent Plug (Ref.
No. 13) in top of pump housing
near motor.
4. Wait for liquid to cease sputtering.
When liquid flow changes to a steady
stream with no air, close Vent Plug.
5. Run pump briefly, then repeat steps
1 thru 4 repeatedly until all air is
evacuated. Pump is now ready to
be run.
ROTATION
Proper rotation is CLOCKWISE when
looking up at shaft end of motor, see
directional arrow cast into motor Adapter
(Ref. No. 8). Bump motor on/off briefly
to confirm motor is wired for correct
rotation. Disregard rotation information
found elsewhere in safety manual.
DRAINING
1. Remove Bypass Valve (Ref. No. 42)
and Vent Plug (Ref. No. 13)
completely.
2. Allow liquid to drain.
3. If pump is to be subjected to
freezing temperatures, do not
reinstall Valve/Plug.
CYCLING
Frequent on/off cycling can shorten
motor life. System should be designed so
that pump is NOT starting more than 15
times per hour.
Maintenance
Make certain
that unit is
disconnected from power source before
attempting to service or remove any
components!
MOTOR REPLACEMENT
DISASSEMBLY
Refer to Figure 8
1. Remove two coupling Shields (Ref.
No. 9) by unscrewing two Fasteners
(Ref. No. 10) for each.
2. Loosen four Fasteners (Ref. No. 4) in
Coupling (Ref. No. 3) evenly until
Motor shaft (Ref. No. 1) can turn
independently from Coupling.
3. Remove four Fasteners (Ref. No. 14)
from Adapter (Ref. No 8). Motor is
now free, lift straight up to remove
from unit.
REASSEMBLY
1. Remove key (if present) from new
Motor shaft and discard.
2. Wipe any protective film from Motor
end bell and shaft, be sure they are
clean.
3. Carefully guide Motor shaft into
Coupling while setting new Motor
into place.
4. Reinstall four Fasteners thru Adapter.
Tighten evenly and in diagonal
pattern, then torque to the following
specifications:
3/8.....................17 ft-lbs. [23 N-m]
1/2.....................30 ft-lbs. [41 N-m]
5. Locate shaft keyway in center of
Coupling (See Figure 4) and maintain
this position, then snug up Fasteners
evenly. Check gap between coupling
halves to be sure it remains even on
both sides. Torque Fasteners to the
following specifications.
M6 .....................10 ft-lbs. [14 N-m]
M8 .....................23 ft-lbs. [31 N-m]
M10....................46 ft-lbs. [62 N-m]
6. Rotate pump Shaft by hand. If
binding or rubbing is found, loosen
Coupling and readjust position.
7. Reattach Shields and proceed to
Startup Procedure section.
SHAFT SEAL REPLACEMENT
DISASSEMBLY
Refer to Figure 8.
1. Remove Motor (see Motor
Replacement section).
3
Models MSV1, MSV3, and MSV5
2
Specifications Information and Repair Parts Manual
Models PM1, PM3, and PM5
3
Fi
g
ure 3 - Components

Maintenance (Continued)
2. Remove Coupling (Ref. No. 3) and
Rod (Ref. No. 2) by unthreading
Screws (Ref. No. 4).
3. Loosen, but do not remove set
screws in Shaft Seal Assembly
(Ref. No. 7).
4. Unscrew Shaft Seal Assembly in a
counter-clockwise direction, then
carefully lift off of Shaft (Ref.
No. 21).
REASSEMBLY
IMPORTANT: Pump Shaft may have
been gouged from set screws. Before
installing new Shaft Seal Assembly,
smooth-over these gouges with a light
grit emery cloth to prevent damage to
new seal.
1. Once shaft is free of burrs, lubricate
Shaft and o-ring cavity in Adapter
(Ref. No. 8) with soapy water.
2. Carefully slide new Shaft Seal
Assembly onto Shaft, then tighten in
clockwise direction and torque to
26 ft-lbs [35 N-m].
3. Mark or otherwise note shaft height.
Lift shaft as high as it will go, then
lower it back down ½ the total
distance. Maintain this position
while evenly tightening 3 set screws
in seal collar and torque each to
2 ft-lbs. [2.5 N-m].
4. Place Rod thru Shaft, then reinstall
Coupling and screws but do NOT
tighten.
5. Proceed to Reassembly under Motor
Replacement section.
PUMP OVERHAUL/INSPECTION
To inspect condition of pump internals,
proceed as follows:
NOTE: To facilitate overhaul, a handy
holding device can be made easily. Take
a short piece of 2×4 lumber and on the
narrow side, drill a 1/2” diameter blind
hole 3” deep. Place block into bench vice
with hole facing up to receive pump
shaft after step 5 (see Figure 5).
DISASSEMBLY
1. Proceed to Disassembly under Shaft
Seal Replacement.
2. Remove 4 Fastener sets (Ref. Nos.
15 & 16).
3. Lift Adapter (Ref. No. 8) from pump,
use a soft mallet to break loose if
necessary.
NOTE: Inspect o-ring groove in Adapter
after o-ring is removed. Rust/pitting in
this region may cause leaks, be sure to
clean or replace Adapter entirely if
damage is excessive.
4. Remove wave Spring (Ref. No. 18)
from Adapter.
NOTE: Inspect wave Spring for cracks
and replace if found.
5. Pump internals can now be removed
all at once. Use pump Shaft (Ref.
No. 21) as a handle and gently lift
the entire assembly out. If stage-1
Volute (Ref. No. 38) stays behind, it
can be removed and inspected later.
Specifications Information and Repair Parts Manual PM1, PM3, and PM5 Series
Multistage Centrifugal Pumps
Vertical Inline Models
4
Fi
g
ure 4
–
Couplin
g
Ali
g
nment
Fi
g
ure 5
–
Inspection

3
Specifications Information and Repair Parts Manual PM1, PM3, and PM5 Series
Multistage Centrifugal Pumps
Vertical Inline Models
55
Fi
g
ure 6
–
A
ssembly Map “1
”
& “3
”
Series

3
Models PM1, PM3, and PM5
5
Specifications Information and Repair Parts Manual PM1, PM3, and PM5 Series
Multistage Centrifugal Pumps
Vertical Inline Models
6
Fi
g
ure 7
–
A
ssembly Map “5
”
Series

7
Specifications Information and Repair Parts Manual PM1, PM3, and PM5 Series
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
Figure 8
–
Repair Parts Illustration

Repair Parts List
Ref. Part Number for Models:
No. Description “1” Series “3” Series “5” Series Qty.
1 Motor see page 9 see page 9 see page 10 1
2 Rod 5900-072-00 5900-072-00 5900-072-00 1
3 Coupling see Ref. No. 5 see Ref. No. 5 see Ref. No. 5 2
4 Socket Head Cap Screw - ISO Class 12.9 *see Ref. No. 5 *see Ref. No. 5 *see Ref. No. 5 4
5 Coupling Kit (Includes Ref. Nos. 2, 3, 4) see page 9 see page 9 see page 10 1
6 O-ring - EPDM *M2.65×22.4 *M2.65×22.4 *M2.65×22.4 1
7 Shaft Seal - EPDM, Carbon, Tungsten Carbide
(Includes Ref. No. 6) 5900-300-00 5900-300-00 5900-300-00 1
8 Adapter see page 9 see page 9 see page 10 1
9 Shield see page 9 see page 9 see page 10 2
10 Pan Head Machine Screw *M4-0.7×8 *M4-0.7×8 *M4-0.7×8 4
11 O-ring - EPDM *M2.4×17.8 *M2.4×17.8 *M2.4×17.8 3
12 Wash Plug Assembly (Includes Ref. No. 11) 5900-044-90 5900-044-90 5900-044-90 1
13 Vent Plug Assembly (Includes Ref. No. 11) 5900-044-90 5900-044-90 5900-044-90 1
14 Hex Head Cap Screw - SAE Grade 5 *see page 9 *see page 9 *see page 10 4
15 Hex Nut - ASTM Class A2-70 *M12-1.75 *M12-1.75 *M12-1.75 4
16 Flat Washer - SS * M12 * M12 * M12 4
17 Staybolt (multiple lengths) see page 9 see page 9 see page 10 4
18 Spring 5900-036-00 5900-036-00 5900-036-00 1
19 O-ring - EPDM *M3.5×138 *M3.5×138 *M3.5×138 2
20 Cylinder (multiple lengths) see page 9 see page 9 see page 10 1
21 Shaft (multiple lengths) see page 9 see page 9 see page 10 1
22 Retaining Ring 5900-090-00 5900-090-00 5900-090-00 1
23 Collar 5900-086-00 5900-086-00 5900-086-00 1
24 Top Plate Weldment w/Crossover (Standard) 5900-172-00 5900-172-00 5930-172-00 1
24a Top Plate Weldment (2-Stage Models Only) 5900-170-00 5900-170-00 N/A 1
25 Sleeve 18.0mm (2-Stage Models Only) 5900-094-00 5900-094-00 N/A 1
26 Impeller Weldment 5900-010-00 5920-010-00 5930-010-00 Varies
27 Sleeve 17.5/26.0mm (Standard) 5900-080-00 5900-080-00 5930-090-00 Varies
28 Cap 5900-156-00 5900-156-00 5930-156-00 Varies
29 Wear Ring - Teflon®5900-084-00 5900-084-00 5930-084-00 Varies
30 Crossover Weldment (Includes 28, 29) 5900-160-00 5900-160-00 5930-160-00 Varies
31 Sleeve 6.5/15.0mm (Bearing Companion) 5900-078-00 5900-078-00 5930-088-00 Varies
32 Bearing Inner - Tungsten Carbide 5900-082-00 5900-082-00 5900-082-00 Varies
33 Bearing Outer - Tungsten Carbide 5900-083-00 5900-083-00 5900-083-00 Varies
34 Crossover Weldment w/Bearing (Includes 28, 29, 33) 5900-162-00 5900-162-00 5930-162-00 Varies
35 Sleeve Cup 5900-076-00 5900-076-00 5900-076-00 1
36 Star Washer *M8 *M8 *M8 1
37 Hex Nut w/Nyloc *M8-1.25 *M8-1.25 *M8-1.25 1
38 Volute Weldment (Includes 28, 29) 5900-150-00 5900-150-00 5930-150-00 Varies
39 Casing 5900-001-00 5900-001-00 5900-001-00 1
40 Oval Gasket - EPDM 5900-053-00 5900-053-00 5900-053-00 2
41 NPT Flange 5900-050-01 5900-050-01 5900-050-02 2
42 Hex Head Cap Screw - Class A2-70 *M10-1.50×40 *M10-1.50×40 *M10-1.50×40 4
43 Vent Plug Assembly (Includes Ref. No. 11) 5900-048-90 5900-048-90 5900-048-90 1
44 Hex Head Cap Screw *5/8"UNC×2½" *5/8"UNC×2½" *5/8"UNC×2½" 8
45 Pipe Flange - ANSI/ASME 250# (Outer) *1¼" NPT *1¼" NPT *1¼" NPT 2
46 Pipe Flange - ANSI/ASME 250# (Inner) *1" NPT *1" NPT *1¼" NPT 2
47 Gasket 5900-068-00 5900-068-00 5900-068-00 2
48 Hex Nut *5/8"-18UNC *5/8"-18UNC *5/8"-18UNC 8
49 Pipe Nipple *1" NPT *1" NPT *1¼" NPT 2
50 Pipe Flange Kit - ANSI/ASME 250# (Includes one
each: 45, 46, 47, 49; and four each: 44, 48) 5900-064-90 5900-064-90 5900-064-91 2
† Seal Kit - Complete (Includes Ref. Nos. 7, 11, 19, 40) 5900-300-90 5900-300-90 5900-300-90 1
(*) Standard hardware item, available locally.
(†) Not Shown
(N/A) Not Applicable
8
Specifications Information and Repair Parts Manual PM1, PM3, and PM5 Series

Ref. No. 1 Motor Ref. No. 5 Ref. No. 8 Ref. No. 9 Ref. No. 14 Ref. No. 17 Ref. No. 20 Ref. No. 21
Model HP 1 Phase 3 Phase Coupling Adapter Shield Cap Screw Staybolt Cylinder Shaft
"1" Series
2-Stage 1/2 1626-320-00 1626-326-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-702-00 5900-602-00 5900-503-00
3-Stage 1/2 1626-320-00 1626-326-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-702-00 5900-602-00 5900-503-00
4-Stage 1/2 1626-320-00 1626-326-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-704-00 5900-604-00 5900-504-00
5-Stage 1/2 1626-320-00 1626-326-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-705-00 5900-605-00 5900-505-00
6-Stage 3/4 1626-321-00 1626-327-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-706-00 5900-606-00 5900-506-00
7-Stage 3/4 1626-321-00 1626-327-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-707-00 5900-607-00 5900-507-00
8-Stage 1 1626-322-00 1626-328-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-708-00 5900-608-00 5900-508-00
9-Stage 1 1626-322-00 1626-328-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-709-00 5900-609-00 5900-509-00
10-Stage 1 1626-322-00 1626-328-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-710-00 5900-610-00 5900-510-00
11-Stage 1½ 1626-323-00 1626-329-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-711-00 5900-611-00 5900-511-00
12-Stage 1½ 1626-323-00 1626-329-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-712-00 5900-612-00 5900-512-00
13-Stage 1½ 1626-323-00 1626-329-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-713-00 5900-613-00 5900-513-00
15-Stage 2 1626-324-00 1626-330-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-715-00 5900-615-00 5900-515-00
17-Stage 2 1626-324-00 1626-330-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-717-00 5900-617-00 5900-517-00
19-Stage 2 1626-324-00 1626-330-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-719-00 5900-619-00 5900-519-00
21-Stage 3 1626-325-00 1626-331-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-721-00 5900-621-00 5900-521-00
23-Stage 3 1626-325-00 1626-331-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-725-00 5900-623-00 5900-523-00
25-Stage 3 1626-325-00 1626-331-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-725-00 5900-625-00 5900-525-00
27-Stage 3 1626-325-00 1626-331-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-727-00 5900-627-00 5900-527-00
"3" Series
2-Stage 1 1626-322-00 1626-328-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-702-00 5900-602-00 5900-503-00
3-Stage 1 1626-322-00 1626-328-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-702-00 5900-602-00 5900-503-00
4-Stage 1 1626-322-00 1626-328-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-704-00 5900-604-00 5900-504-00
5-Stage 1 1626-322-00 1626-328-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-705-00 5900-605-00 5900-505-00
6-Stage 1 1626-322-00 1626-328-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-706-00 5900-606-00 5900-506-00
7-Stage 1½ 1626-323-00 1626-329-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-707-00 5900-607-00 5900-507-00
8-Stage 1½ 1626-323-00 1626-329-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-708-00 5900-608-00 5900-508-00
9-Stage 1½ 1626-323-00 1626-329-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-709-00 5900-609-00 5900-509-00
10-Stage 2 1626-324-00 1626-330-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-710-00 5900-610-00 5900-510-00
11-Stage 2 1626-324-00 1626-330-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-711-00 5900-611-00 5900-511-00
12-Stage 2 1626-324-00 1626-330-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-712-00 5900-612-00 5900-512-00
13-Stage 3 1626-325-00 1626-331-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-713-00 5900-613-00 5900-513-00
15-Stage 3 1626-325-00 1626-331-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-715-00 5900-615-00 5900-515-00
17-Stage 3 1626-325-00 1626-331-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-717-00 5900-617-00 5900-517-00
19-Stage 3 1626-325-00 1626-331-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1¼" 5900-719-00 5900-619-00 5900-519-00
21-Stage 5 N/A 1626-360-00 5920-070-90 5920-030-00 5920-038-00 1/2"-13UNC×1¼" 5900-721-00 5900-621-00 5900-521-00
23-Stage 5 N/A 1626-360-00 5920-070-90 5920-030-00 5920-038-00 1/2"-13UNC×1¼" 5900-725-00 5900-623-00 5900-523-00
25-Stage 5 N/A 1626-360-00 5920-070-90 5920-030-00 5920-038-00 1/2"-13UNC×1¼" 5900-725-00 5900-625-00 5900-525-00
Repair Parts List (Continued)
Specifications Information and Repair Parts Manual PM1, PM3, and PM5 Series
9

Ref. No. 1 Motor Ref. No. 5 Ref. No. 8 Ref. No. 9 Ref. No. 14 Ref. No. 17 Ref. No. 20 Ref. No. 21
Model HP 1 Phase 3 Phase Coupling Adapter Shield Cap Screw Staybolt Cylinder Shaft
"5" Series
2-Stage 2 1626-324-00 1626-330-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1" 5900-702-00 5900-602-00 5930-503-00
3-Stage 2 1626-324-00 1626-330-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1" 5930-703-00 5930-603-00 5930-503-00
4-Stage 2 1626-324-00 1626-330-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1" 5900-706-00 5900-606-00 5930-504-00
5-Stage 2 1626-324-00 1626-330-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1" 5930-705-00 5930-605-00 5930-505-00
6-Stage 2 1626-324-00 1626-330-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1" 5900-709-00 5900-609-00 5930-506-00
7-Stage 2 1626-324-00 1626-330-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1" 5930-707-00 5930-607-00 5930-507-00
8-Stage 3 1626-325-00 1626-331-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1" 5900-712-00 5900-612-00 5930-508-00
9-Stage 3 1626-325-00 1626-331-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1" 5930-709-00 5930-609-00 5930-509-00
10-Stage 3 1626-325-00 1626-331-00 5900-070-90 5900-030-00 5900-038-00 3/8"-16UNC×1" 5900-715-00 5900-615-00 5930-510-00
11-Stage 5 N/A 1626-360-00 5920-070-90 5920-030-00 5920-038-00 1/2"-13UNC×1¼" 5930-711-00 5930-611-00 5930-511-00
12-Stage 5 N/A 1626-360-00 5920-070-90 5920-030-00 5920-038-00 1/2"-13UNC×1¼" 5930-712-00 5930-612-00 5930-512-00
13-Stage 5 N/A 1626-360-00 5920-070-90 5920-030-00 5920-038-00 1/2"-13UNC×1¼" 5930-713-00 5930-613-00 5930-513-00
14-Stage 5 N/A 1626-360-00 5920-070-90 5920-030-00 5920-038-00 1/2"-13UNC×1¼" 5900-721-00 5900-621-00 5930-514-00
15-Stage 5 N/A 1626-360-00 5920-070-90 5920-030-00 5920-038-00 1/2"-13UNC×1¼" 5930-715-00 5930-615-00 5930-515-00
16-Stage 5 N/A 1626-360-00 5920-070-90 5920-030-00 5920-038-00 1/2"-13UNC×1¼" 5930-716-00 5930-616-00 5930-516-00
18-Stage 7½ N/A 1626-361-00 5930-070-90 5920-030-00‡ 5920-038-00 1/2"-13UNC×1¾" 5900-727-00 5900-627-00 5930-518-00
20-Stage 7½ N/A 1626-361-00 5930-070-90 5920-030-00‡ 5920-038-00 1/2"-13UNC×1¾" 5930-720-00 5930-620-00 5930-520-00
22-Stage
24-Stage
26-Stage
7½
7½
5*
N/A
N/A
N/A
1626-361-00
1626-361-00
1626-361-00
5930-070-90
5930-070-90
5930-070-90
5920-030-00‡
5920-030-00‡
5920-030-00‡
5920-038-00
5920-038-00
5920-038-00
1/2"-13UNC×1¾"
1/2"-13UNC×1¾"
1/2"-13UNC×1¾"
5930-722-00
5930-724-00
5930-726-00
5930-622-00
5930-624-00
5930-626-00
5930-522-00
5930-524-00
5930-526-00
29-Stage 5* N/A 1626-361-00 5930-070-90 5920-030-00‡ 5920-038-00 1/2"-13UNC×1¾" 5930-729-00 5930-629-00 5930-529-00
(‡) Adapter requires Disk 5930-035-00
(*) 50 Hertz only
Repair Parts List (Continued)
Specifications Information and Repair Parts Manual PM1, PM3, and PM5 Series
10

Maintenance (Continued)
IMPORTANT: Stainless steel
components deform easily, be careful to
avoid damaging pump components
during disassembly.
6. Unscrew Hex Nut (Ref. No. 37) from
pump Shaft in a counter-clockwise
direction and remove along with
Sleeve Cup (Ref. No. 35).
7. Lift Volute (if still present) and
Impeller (Ref. No. 26) from stack
and set aside.
IMPORTANT: Take note of sequence
parts are arranged in and direction they
are facing, number and mark if
necessary (see Figure 6 & 7).
8. Lift next Volute/Crossover (Ref.
No. 34), Inner Bearing (Ref. No. 32),
and Impeller from stack.
NOTE: Inspect Inner and Outer Bearings
for wear. If grooves can be seen or felt,
replace both bearings as a set.
9. Use a large straight blade
screwdriver to carefully pry Cap (Ref.
No. 28) from Crossover to free Wear
Ring (Ref. No. 29).
NOTE: Inspect for wear by placing Wear
Ring over nose of Impeller and noting
clearance between two diameters. If fit
is not snug, replace Wear Ring.
10. Repeat Steps 7 and& 8 for each
stage (some stages have no
bearings).
NOTE: Inspect Shaft (Ref. No. 21) for
grooves, replace if splines are worn.
11. Lift Cylinder (Ref. No. 20) from
Casing (Ref. No. 39), use a soft
mallet to break loose if necessary.
NOTE: Inspect o-ring groove in Casing
after o-ring is removed. Rust/pitting in
this region may cause leaks, be sure to
clean or replace Casing entirely if
damage is excessive.
12. If stage-1 Volute (Ref. No. 38)
remains in Casing, now is the time to
remove it. Gently pry loose with a
straight blade screwdriver, being
careful to avoid bending it.
13. Unscrew 2 fasteners (Ref. No. 42).
14. Use a straight blade screwdriver to
pry pipe Flange (Ref. No. 41) loose.
15. Use a putty knife to scrape off old
Gasket (Ref. No. 40) from Flange
and Casing.
REASSEMBLY
1. Always use new Gaskets (Ref.
No. 40) when reassembling. Attach
pipe Flanges (Ref. No. 41) with
Fasteners (Ref. No. 42). Tighten
evenly and torque to 33 ft-lbs
[45 N-m].
2. Place new O-ring (Ref. No. 19) into
cleaned groove of Casing (Ref.
No. 39), be sure to lubricate with
soapy water or suitable material.
3. Place stage-1 Volute (Ref. No. 38)
back into Casing (Ref. No. 39)
making sure it is seated properly.
4. Carefully guide Cylinder (Ref. No. 20)
back into Casing and press down.
IMPORTANT: If Cylinder does not fully
seat, O-ring may be pinched. If this
occurs, lift Cylinder back out and try
stretching O-ring. Be sure components
are adequately lubricated and have not
been damaged. Repeat process until end
of Cylinder bottoms on Casing.
5. Reassemble Impellers (Ref. No 26),
Crossovers (Ref. No. 34), etc. onto
pump Shaft (Ref. No. 21) in same
order they were removed (see
Figure 6 & 7) and torque Hex Nut
w/Nyloc (Ref. No. 37) to 13 ft-lbs
[18 N-m].
IMPORTANT: NEVER reuse Hex Nut
w/Nyloc, ALWAYS replace with new
unused one.
6. Take Impeller/Crossover stack by
Shaft and lower into pump until
properly seated.
7. Place new O-ring (Ref. No. 19) into
cleaned groove of Adapter (Ref.
No. 8), be sure to lubricate with
soapy water or suitable material.
8. Install wave Spring (Ref. No. 18)
with ends pointed towards Adapter.
With wave Spring seated on proper
landing in Adapter, carefully guide
Adapter onto pump and press down.
IMPORTANT: If Adapter does not fully
seat, O-ring may be pinched. If this
occurs, lift Cylinder back out and try
stretching O-ring. Be sure components
are adequately lubricated and have not
been damaged. Repeat process until
Adapter bottoms on end of Cylinder.
9. Reinstall Fasteners (Ref. Nos. 15
& 16) onto Staybolts (Ref. No. 17)
and tighten diagonally.
10. Proceed to Reassembly portion of
Shaft Seal Replacement.
11
Specifications Information and Repair Parts Manual
Models PM1, PM3, and PM5