Circor IMO E12L Series User manual

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PRODUCT SERVICE MANUAL
FOR
E12L SERIES PUMPS
WARNING
The Imo General Installation, Operation, Maintenance, and Troubleshooting
Manual, (No. SRM00046), along with this manual and all other component
manuals supplied with these type units should be read thoroughly prior to pump
installation, start-up, operation, maintenance, or troubleshooting.
Manual No. SRM00055 Rev. 06 (20-0051) February 2020

IMPORTANT NOTE
The importance of seal chamber priming cannot be overemphasized. Due to the prevalence of
seal damage and leakage caused by not filling the seal chamber with liquid before putting a
pump in service, this page is located at the beginning of this document.
SEAL CHAMBER PRIMING
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Fill mechanical seal chamber with liquid to insure seal does not start dry. This can be done by
removing seal vent set-screw and pouring liquid into vent passageway before opening pump
inlet. Alternately, seal chamber can be vented in situations where inlet pressure is above
atmospheric by opening inlet and discharge valves and then loosening seal vent plug to allow
positive inlet pressure to push air out of seal chamber until oil flows from it. See figure below.
Filling or Venting Seal Cavity Using Seal Vent
CAUTION
Failure to fill or vent seal chamber as described above may cause damage to seal running
faces which may result in seal leakage.

READ THIS ENTIRE PAGE BEFORE PROCEEDING
FOR SAFETY OF PERSONNEL AND TO PREVENT DAMAGE TO EQUIPMENT, THE FOLLOWING
NOMENCLATURE HAS BEEN USED IN THIS MANUAL:
DANGER
Failure to observe precautions noted in this box can result in severe bodily injury or loss of life.
WARNING
Failure to observe precautions noted in this box can cause injury to personnel by accidental contact with
equipment or liquids. Protection should be provided by user to prevent accidental contact.
CAUTION ATTENTION
Failure to observe precautions noted in this box can cause damage or failure of equipment.
Noncompliance of safety
instructions identified by the
following symbol could affect
safety for persons:
Safety instructions where
electrical safety is involved
are identified by:
Safety instructions which shall be
considered for reasons of safe operation
of pump and/or protection of pump itself
are marked by the sign:
ATTENTION
ATTENTION
If operation of pump is critical to your business, we strongly recommend you keep a spare pump or major
repair kit in stock at all times. As a minimum, a minor repair kit (o-rings, gaskets, shaft seal and bearings)
should be kept in stock so pump refurbishment after internal inspection can be accomplished.
CONTENTS
SAFETY AND TABLE OF CONTENT……………..….............................................. A
A. GENERAL NSTRUCTIONS.......................................................................... 1
B. INTRODUCTION ......................................................................................... 1
C. DESCRIPTION OF THE PUMP ................................................................... 1
D. PUMP MODEL IDENTIFICATION ............................................................... 2
E. ORDERING INSTRUCTIONS ..................................................................... 2
F. OPERATION ................................................................................................ 3
G. PARTS LIST AND TORQUE TABLES .......................................................... 4
H. PUMP MAINTENANCE ............................................................................... 5-9
I. TROUBLESHOOTING ................................................................................. 10
J. FIELD AND FACTORY SERVICE AND PARTS ........................................... 10
A

A. GENERAL INSTRUCTIONS
Instructions found herein cover disassembly, assembly and parts identification of E12L series
pumps.
NOTE: Individual contracts may have specific provisions that vary from this manual. Should any
questions arise which may not be answered by these instructions, refer to Imo General
Installation Operation, Maintenance, and Troubleshooting Manual,SRM00046, provided
with your order. For further detailed information and technical assistance please refer to
Imo Pump, Technical/Customer Service Department, at [phone].
Manual cannot possibly cover every situation connected with installation, operation, inspection,
and maintenance of equipment supplied. Every effort was made to prepare text of manual so that
engineering and design data is transformed into most easily understood wording. Imo Pump must
assume personnel assigned to operate and maintain supplied equipment and apply instruction
manual have sufficient technical knowledge and are experienced to apply sound safety and
operational practices which may not be otherwise covered by this manual.
In applications where equipment furnished by Imo Pump is to become part of processing
machinery, these instructions should be thoroughly reviewed to ensure proper fit of said
equipment into overall plant operational procedures.
WARNING
If installation, operation, and maintenance instructions are not correctly and strictly followed and
observed, injury to personnel or serious damage to pump could result. Imo Pump cannot accept
responsibility for unsatisfactory performance or damage resulting from failure to comply with
instructions.
B. INTRODUCTION
This instruction manual covers series E12L Series Imo pumps. This series of pumps has been
designed for use in hydraulic, lubricating, and seal, applications requiring high inlet pressure
capabilities. The model and design construction of each pump can be identified by the designator
code on the pump nameplate. Definitions of model designators are identified in Figure 1.
C. DESCRIPTION OF EQUIPMENT
The E12L Series pumps are positive displacement, rotary screw pumps consisting of a precision
bored housing which encloses a driven screw (power rotor) and two intermeshing following
screws (idler rotors). These screws when rotating form a succession of closures or cavities. As
they rotate, fluid is moved axially from inlet port to outlet port in a continuous, uniform flow with
minimum fluid pulsation and pump noise.
1

D. PUMP MOEL IDENTIFICATION
This instruction manual covers the Imo Series E12L pumps with rotor sizes 118 through 200.
The model of each pump is identified on the pump nameplate. Refer to Figure 1 and Table 1 for
instructional keys when using this manual.
Table 1 – E12L Series Pump Models
Pump Model Number Assembly Figure Number
E12LYTFS-118
E12LYTFS-137
E12LYTFS-156
E12LYTFS-187
E12LYTFS-200
3
4
5
5
5
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Figure 1 – Model Designator Definitions
E 12L X X X X XXX
Design Modification
(Assigned by Imo)
Series
Seal Design
Rotor Size
-118, -137, -156,
-187, -200
Y = Type BXQW Case
S = Steel
Seal Seat Material Mounting
T = Carbide Seal Seat F = Foot Mounted
E. ORDERING INSTRUCTIONS
When corresponding with Imo Pump regarding Series E12L pumps, refer to the pump nameplate, this
instruction manual, and the assembly drawing as instructed below:
1. From pump nameplate, record the pump model number, serial number and manufactured date.
2. Record instruction manual number, revision and date.
3. From the instruction manual, record the figure numbers that apply to the replacement part(s).
4. From the assembly drawing or parts list (see Figures 3, 4, 5 andTable 3) provide the IDP number(s)
and names for the replacement part(s).
5. Give the above information to your Imo service representative.\
Imo sales and service representatives are listed herein and in Imo General Installation Operation,
Maintenance, and Troubleshooting Manual, SRM00046.
2

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F. O P E R AT I O N
F.1 LIQUID LIMITATIONS
Never operate with thin liquids such as solvents or water. The pump is designed for liquids
having the general characteristics of oil.
F.2 OPERATING LIMITS
CAUTION ATTENTION
Operating conditions, such as speed, fluid viscosity, temperature inlet pressure, discharge
pressure, filtration, duty cycle, drive type, mounting, etc., are interrelated. Due to these
variable conditions, the specific application limits may be different from that of the
operational limitations. This equipment must not be operated without verifying system’s
operating requirements are within the pump’s capabilities.
Under no circumstances are the following operating limits (specified in Table 2) to
be exceeded without specific approval from Imo Pump.
Table 2 – Normal Pump Operating and Structural Limits
MAXIMUM SPEED .............................................................. Rotor sizes 118 thru 156 4400 RPM Rotor
size 187 thru 200 3600 RPM
VISCOSITY .................................... 45 SSU (5.8 cSt) Minimum – 3000 SSU (650 cSt) Maximum
NOTE: Consult factory for allowable operating viscosities at specific speeds and pressures.
DO NOT alter design viscosity without prior consultation with Imo Pump.
MINIMUM – MAXIMUM LIQUID TEMPERATURE .............................. 0 to 250F (-18 to 121C) MAXIMUM
INLET PRESSURE......................................................................................... 200 psig
NOTE: Series 12L pumps are designed for positive inlet pressures. The unit should not be
operated for extended periods of time with inlet pressure less than atmospheric.
MAXIMUM DISCHARGE PRESSURE ............................. Rotor Size 118, 4000 psig, Cont. Duty
Rotor Sizes 137 thru 200 4500 psig, Cont. Duty
NOTE: Consult Imo Pump for 5000 psig operation
FILTRATION....................................................................(See Imo General Installation Operation, Maintenance,
and Troubleshooting Manual, SRM00046)
DRIVE...........................................................................................................................Direct only ROTATION
.................................................................................................Clockwise only facing pump shaft MOUNTING
..............................................................................................................Foot or Flange mounted in any attitude
3

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G. PARTS LIST AND TORQUE TABLES
Table 3 – Pump Parts List
IDP QTY DESCRIPTION KIT IDP QTY DESCRIPTION KIT
11Case 30 4Bolt
(
s
)
22E
y
ebolt
(
s
)
31 1Bearin
g
Nut XX
31Housin
g
XX 32 1Bearin
g
Washe
r
XX
41Housin
g
XX 33 2Idle
r
Rotor
(
s
)
XX
51Shim o
r
S
p
ace
r
XX 36 1Outboa
r
d Cove
r
62Back-u
p
Rin
g
s
(
s
)
X37 1Plu
g
72O-rin
g(
s
)
X38 2Plate
,
Sub-
A
ss
y(
s
)
82Vent Pin
(
s
)
39 8Ca
p
Screw
(
s
)
91Sto
p
Pin 40 8Ca
p
Screw
(
s
)
10 1O-rin
g
X41 8D
y
na Seal
(
s
)
11 1Plu
g
42 4Lockwashe
r
,
Internal Teeth
12 1Inboa
r
d Cove
r
43 4Ca
p
Screw
(
s
)
13 1O-rin
g
X56 6Drive Screw
(
s
)
14
15
1
1
O-ring
Bal. Piston Bushin
g
X
XX
60
62
16
1
Lockwasher(s) ***
S
p
ace
r
16 1S
p
ace
r
63 1S
p
rin
g
Pin
17 1Sto
p
XX 64 1S
p
ace
r
,
Sub-
A
ss
y
18 8Ca
p
Screw
(
s
)
(
SEE NOTE
)
65 1S
p
ace
r
19 5O-rin
g(
s
)
X66 1Trua
r
cRin
g
* XX
20 5Plu
g(
s
)
66 2Ca
p
Screw
(
s
)
** XX
21 1Inlet Head 67 2Idle
r
Rotor
(
s
)
XX
22 1Plu
g
70 1O-rin
g
X
23 1Powe
r
Roto
r
XX 71 1Set-Screw Cu
p
24 1Seal X72 3Drive Screw
(
s
)
25 1Trua
r
c Rin
g(
s
)
X74 1LOCTITE X
27 1Ke
y
75 4Idle
r
Rotor
(
s
)
XX
28 1Ball Bearin
g
XName
p
la
t
e Module
29 1Retaine
r
X = Minor Repair Kit Items.
XX = Major Repair Kit Items. (Items marked (X) are included in Major Repair Kit).
* = For Rotor Sizes 118, 137 and 156
** = For Rotor Sizes 187 and 200
*** = For Rotor Size 118 Only
NOTE: If Nylok cap screws (18) are assembled/disassembled more than 5 times, Imo suggests
replacing with new Nylok cap screws.
Table 4 – Fastener Tightening Torque Values
IDP Number ROTOR SIZE ASSEMBLY
Fi
g
.Numbe
r
TORQUE VALUE
(
En
g
lish
)
TORQUE VALUE
(
Metric
)
18 & 39 118 3 100 ±10 lb. ft. 135 ±14 Nm
18 & 39 137 & 156 4 160 ±10 lb. ft. 217 ±14 Nm
18 & 39 187 & 200 5 290 ±10 lb. ft. 393 ±14 Nm
4

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H. PUMP MAINTENANCE
WARNING
Failure to observe precautions while installing, inspecting, and maintaining the pump can
cause injury to personnel from accidental handling of liquids that may harm skin or clothing,
or fire hazard risks from flammable liquids, or injury from high pressure fluid jets.
DANGER
Before working on equipment, make sure all power to the equipment is disconnected and
locked-out.
H.1 GENERAL COMMENTS
NOTE: Part number identifiers (IDPs) contained within parenthesis such as (10) refer to the circled
numbers shown on the assembly drawing. See Figure 3, 4 and 5, Tables 3 and 4.
H.2 TOOLS REQUIRED
The procedures described in this manual require common mechanics hand tools, a torque wrench,
dial indicator and suitable lifting device (such as) slings, straps, etc.
H.3 PUMP DISASSEMBLY
SPECIAL NOTE: To service mechanical seal and ball bearings ONLY, perform H.3, Steps
1, 5 and H.4, Steps 3, 4, 7 and 8 ONLY.
H. 4 Before starting pump disassembly perform the following:
a. De-energize driver.
b. Close all inlet and outlet valves.
c. Vent pressure from pump and drain pumping liquid.
d. Remove cap screws and lock washers from inlet and outlet flange fittings.
e. Remove any O-rings from inlet and outlet flange grooves.
f. Remove pump from driver by removing coupling hub and key (27) from power rotor (23)
shaft.
G. Remove pump from its mounting and locate on a suitable work bench.
NOTE: The Series E12L pumps incorporate highly finished precision parts that must
be handled carefully to avoid damage to critical machined surfaces. The parts removed
should be tagged for identification and their exact positions in the pump carefully noted
so that new parts, or the same parts, are properly replaced without damage.
5
CAUTION ATTENTION
Fluid leakage from disassembly of pump may make the floor slippery and can
cause personal injury.

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H. 5 Remove Outboard Cover (Suction Side) – See Figures 3, 4 and 5
Remove cap screws (40) with Dyna seals (41) from outboard cover (36). Pull out- board
cover slightly away from case (1) to release oil from inlet chamber of pump. Provisions must
be made for oil spillage. Rotate power rotor (23) in opposite direction from normal to drain
trapped fluid. Remove Dyna seals (41) from capped screws (40). Clean cap screws using
LOCTITE Gasket Eliminator 504. Remove outboard cover (36) with sub-assembly from inlet
head (21).
NOTE: The outboard cover (36) and sub-assembly consists of O-rings (14 & 19), plug (20),
plate sub-assembly (38) and cap screws (43) with lockwashers (42).
Remove cap screws (43) and lock washers (42) and plate sub-assembly (38) from
outboard cover (36). Remove O-rings (14 & 17) from grooves of outboard cover.
H. 6 Remove Inlet Head (Suction Side)
Remove cap screws (39) and washers (60) and inlet head (21) from case (1). Re- move O-
rings (13 & 19) from grooves in case (1).
H. 7 Remove Idler Rotors and Bearing Retainer
Remove idler rotors (67, 75 & 33) from bores of rotor housings (3 & 4) by rotating power rotor
in the opposite direction of normal rotation. This will unscrew and release the idler rotors from
the power rotor.
NOTE: Do not permit the idler rotors to drop as they emerge from housing (3).
Remove hex bolts (30) and bearing retainer (29) from inboard cover (12).
H. 8 Remove and Disassemble Power Rotor
Remove assembled power rotor (23) from pump. Disassemble power rotor assembly
(23) as follows:
a. Remove bearing nut (31) and washer (32).
b. Using a bearing puller or arbor press remove ball bearing (28).
c. Remove Truarc ring (25) from groove of power rotor (23).
d. Remove spacer sub-assembly (64). Removal of spacer sub assembly (64) includes
removal of spacer (62), spring pin (63) and mechanical seal stationary seat and O-ring
(1 & 2) of Figure 2.
e. Remove mechanical seal seat (1) and O-ring (2) of Figure 2 from spacer (62).
f. Loosen set-screws (see Figure 2, (3C)) and slide mechanical seal rotating assembly
(Figure 2, (3)) from power rotor (23).
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Figure 2 – Mechanical Seal (24)
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2
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1
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3
3A
3C
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1. Seat
2. O-Ring
3B
3. Rotating Assembly
3A. Bellows Assembly
3B. Bellows Assembly O-Ring
3C. Set Screw
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H. 9 Remove and Disassemble Inboard Cover (Discharge side)
Remove cap screws (18) and (washers (60) 118 rotor size pump only) from inboard cover (12).
Insert two 1/2"-13" x 2" jacking bolts in inboard cover (12). Tighten jacking bolts evenly to
remove inboard cover from case (1). When cover removed from case remove jacking bolts.
NOTE: The inboard cover (12) removal includes removal of O-rings (70 & 7), back up ring (6),
balance piston bushing (15), stop (17), Truarc ring (66) or cap screws (66) and plug (20).
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Disassemble the inboard cover (12) as follows:
a. Remove O-ring (70) from groove of inboard cover (12). Remove O-ring (7) and back-up
ring (66) from groove of inboard cover (12).
b. For rotor sizes 118 to 156 – Remove Truarc ring (66) from groove of inboard cover
(12).
c. For rotor sizes 187 and 200 – Remove cap screws (66) from stop (17).
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d. Remove stop (17) and balance piston bushing (15) from inboard cover (12).
Remove O-rings (19) from grooves of case (1).
For rotor sizes 137 to 200 – Remove spacer (16) from case (1). Remove spacer (16) from
case (1).
For rotor sizes 137 and 187 – Remove spacer (65) from case (1).
Remove plug (11) with O-ring (10) from case (1). Remove stop pin (9) from case (1)
by threading a 1/4”-20" x 2 1/2” bolt into bore of case and pulling stop pin from case.
CAUTION ATTENTION.
DO NOT drop housings as they emerge from case.
e. Remove housings (3 & 4) from case (1). Separate housings (3 & 4) and remove vent pins
(8).
f. Remove O-ring (7) and back-up ring (6) from groove of housing (4).
7

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I. 1 PUMP ASSEMBLY
NOTE: Prior to assembly, all parts should be cleaned and inspected for nicks and burrs.
Replace all worn or damaged parts. Imo Pump recommends automatic replacement of
mechanical seal (24), ball bearing (28) and O-rings (7, 10, 13, 14, 19 and 70) when these parts
have been disturbed from their previously installed positions. Prior to assembly, wipe all parts
including fasteners with a lubrication fluid that is compatible with the process liquid.
NOTE: When assembling the pump, refer to Figure 2 – Mechanical Seal, Figures 3, 4 and 5 –
Assembly Drawings and Table 3 – Pump Parts List.
I.2 Assemble and Install Housings into Case
Install back-up ring (6) and O-ring (7) in groove of housing (4). Install vent pins (8) in bores of
housing (4). Install housing (4) in outboard end of case (1) with O-ring (7) and back-up ring (6)
positioned toward inboard end of pump. Install housing (3) in case (1), ensuring that bores of
housing (3) engage vent pins (8) installed in housing (4). Push housings into case (1) and align bore
of housing (4) with stop pin (9) threaded bore in top of case. Use caution not to damage O-ring (7)
during this assembly step. Install stop pin (9) in top of case (1), ensuring that stop pin is properly
engaged in housing (4) slot. Install O-ring (10) on plug (11) and thread plug into bore in top of case (1).
I.3 Assemble and Install Inboard Cover (Discharge Side)
For Rotor sizes 137 to 200 – Install spacer (16) in case 1).
For rotor sizes 137 and 187 – Install spacer (65) in case (1). Install back-up ring (6) and O-
ring (7) in groove of inboard cover (12). Install balance piston bushing (15) and stop (17) on
inboard cover (12).
NOTE: Back-up ring should be installed toward inboard end (discharge side) of pump when
inboard cover (12) is installed.
For rotor size 187 and 200 – Install cap screws (66) in stop (17).
For rotor sizes 118, 137 and 156 – Install Truarc rings (66) in grooves of inboard cover (12).
Install O-rings (19) in flange grooves of case (1). Using cap screws (18) and (washers (60) 118
rotor size only), assemble inboard cover (12) to case (1). Torque cap screws to values
indicated in Table 4.
NOTE: Ensure the port of the inboard cover (21) is properly aligned with the case (1) port.
With the inboard cover (12), housings (3 & 4) and (spacer (16) if applicable) installed in case (1),
push in all internal parts from outboard end (suction side) of pump until all parts are properly seated.
Using a depth gage, measure the distance from the exposed flat surface of housing (3) (for rotor sizes
118, 156 or 200) to flange of case (1) – OR – measure from spacer (65) (for rotor sizes 137 or 187) to
case (1) to flange to determine required spacer (5) thickness. Subtract 0.010 ± .005" (0.25 ± 0.13 mm)
from measurement.
NOTE: The working clearance between the inlet head (21) and spacer (5) is 0.010 ± 0.005"
(0.25 ± 0.13mm).
8

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Machine spacer to required thickness as determined above – OR – build-up layers of
shim material to obtain the required thickness. Shim layers are 0.003 inches (0.08mm)
thick. Install the shim/spacer (5) with proper thickness into case (1).
I.4 Assemble Power Rotor
Assemble power rotor (23) as follows:
a. Install rotating assembly (3) (see Figure 2) of mechanical seal (24) onto power rotor
(23). Push assembly next to cut shoulder on rotor shaft. Tighten set-screws (3C) (see
Figure 2).
b. Install O-ring (2) (see Figure 2) on stationary seat (1) of mechanical seal (24).
Install stationary seat and O-ring in spacer (62). Ensure that spring pin (63) en- gages
slot in stationary seat.
c. Install spacer (62) on power rotor (23) and lock-in using Truarc ring (25) in groove of rotor
shaft.
d. Using a arbor press, install bearing (28) on power rotor (23). Press ONLY on inner race of
bearing (28) when installing.
e. Install washer (32) and nut (31) on rotor shaft (23).
f. Install O-ring (70) in groove in the inboard cover (12).
I.5 Install Power Rotor (Discharge Side)
Install power rotor (23) into inboard cover (12) and pump case (1). Center each part as it
enters the inboard cover (12). Install retainer (29) and bolts (30). Torque bolts to 25 ± 2 lb. ft.
(33.9 ± 2.7 Nm)
I.6 Install Idler Rotors (Suction Side)
a. Install idlers (33, 75 and 67) into idler bores of housings (3 & 4) from outboard end of
pump. Mesh idlers with threads of power rotor and rotate power rotor (23) in normal
pump rotation direction. Idlers will thread into pump housing. Install O-rings (13 & 19) in
outboard flange grooves of case (1). Install inlet head (21) into case (1) ensuring that the
inlet head idler balance drillings are properly aligned with the idler balance drillings of the
case. Install cap screws (39) and (washers (60) 118 rotor size only) to secure inlet head to case.
Torque cap screws to values indicated in Table 4.
9
CAUTION ATTENTION
Machining or grinding capabilities maybe required to ensure spacer (5) meets proper fit-
up dimensions. If spacer (5) is not properly fitted, pump damage or failure may occur.
CAUTION ATTENTION
Bearing service life could be significantly reduced if the bearing is pushed on
by its outer race ring.

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NOTE: Inlet head (21) may be rotated in 90 increments from position shown in
Figures 3, 4 and 5.
I.7 Install Outboard Cover
Install O-rings (14 & 19) in grooves of outboard cover (36). Install plate sub-assembly (38) on
outboard cover (36) using cap screws (43) and lockwashers (42). Install Dyna seals (41) on
cap screws (40) using a thin coat of LOCTITE Gasket Eliminator 504. Using cap screws (40)
and Dyna seals (41) secure outboard cover (36) to inlet head (21). Torque cap screws to 50 ± 5
lb. ft. (68 ± 7 Nm).
NOTE: Use caution when installing plate sub-assembly (38) to avoid damage to O- rings (14 &
19). Also ensure that plate (38) oil ports are properly aligned with idler rotors (67).
C
A
UTION
Ensure that “CAUTION” nameplate mounted on the outboard cover (36) is installed in the
proper position with arrows aligned with case eyebolts (2). Also check that the oil ports in
plate (38) are aligned with idler rotors (67).
I.8 Install Pump to Mount and Reconnect Couplings
Assemble key (27) and pump coupling hub to power rotor shaft (23). Install pump on foundation
or bracket. Reconnect all piping to pump.
I.9 Align Pump and Driver
Perform alignment of pump and driver as specified in in Imo General Installation Operation,
Maintenance, and Troubleshooting Manual, SRM00046.
J. TROUBLESHOOTING
For assistance with troubleshooting see Imo General Installation,
Operation, Maintenance, and Troubleshooting Manual, (No. SRM00046)
K. FIELD AND FACTORY SERVICE AND PARTS
Imo Pump maintains a staff of trained service personnel that can provide pump installation, pump
start-up, maintenance/overhaul and troubleshooting supervision as well as installation and
maintenance training.
Our factories provide maintenance as well as overhaul and test facilities in the event the user prefers
to return pumps for inspection or overhaul. Pumps that have been factory-overhauled are normally
tested and warranted “as-new” for a period of one year from date of shipment. For either field service
or factory overhaul assistance, contact your local Imo Sales Office or representative at the Technical/
Customer Service Department in Monroe, NC, USA.
Most pumps have repair kits available. Minor Repair Kits are used to repair leaking seals, bad
bearings and/or for re-assembly after pump tear-down. They include (as applicable) pump shaft
seals, packing, all gaskets/O-rings and bearings. Major Repair Kits are sufficient to rebuild
completely worn-out pumps to “as-new” condition. They include all parts found in Minor Repair Kits
plus all major internal parts subject to wear. Since kits have all the necessary parts, it is preferred
that they be purchased rather than selecting individual parts. When parts are individually selected
from the Parts List, some needed components are often overlooked. In addition, mixing worn or used
parts with new parts risks rapid wear and shortened service life from the new parts.
10

CAUTION
ARROW TO LINE UP
WITH EYEBOLTS
FIGURE 3 – PUMP ASSEMBLY – ROTOR SIZE 118
Page 11

FIGURE 4 – PUMP ASSEMBLY – ROTOR SIZES 137 & 156
CAUTION
ARROW TO LINE UP
WITH EYEBOLTS
Page 12

CAUTION
ARROW TO LINE UP
WITH EYEBOLTS
FIGURE 5 – PUMP ASSEMBLY – ROTOR SIZES 187 & 200
Page 13

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CIRCOR
1710 Airport Road
PO Box 5020
Monroe, NC USA
28111.5020
Tel: [phone]
Email: [e-mail]
Web: www.circorpt.com
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© 2020 CIRCOR Pumps North America, LLC. All rights reserved.