Carver Pump Maxum OH1 Manual

Maxum OH1 –
End Suction Process Pump
INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
This manual shall always be kept close to the unit’s location of operation or directly on the pump set.
Part Number: _______________________________________
Serial Numbers: _____________________________________
These operating instructions contain fundamental information and precautionary notes. Please r
ead the manual
thoroughly prior to installation of unit, electrical connection and commissioning. It is imperative to comply with all
other operating instructions referring to components of individual units.
I-402
402 – 17.04.EN
ATEX
Inch Units

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
MANUFACTURER: CARVER PUMP COMPANY
2415 PARK AVE.
MUSCATINE, IOWA, USA 52761
PRODUCT DESCRIPTION: Maxum OH1 Pump
PART NUMBER:
SERIAL NUMBER:
DATE MANUFACTURED:
APPLICABLE EUROPEAN DIRECTIVES:
Machinery: The designated product complies with the following basic requirements of Directive 2006/42/EC:
Appendix I, section 1.1.2, 1.1.3., 1.1.5., 1.3.1., 1.3.2., 1.3.3., 1.3.4., 1.3.7., 1.3.8., 1.4.1., 1.4.2.1.,
1.5.1., 1.5.8., 1.5.9., 1.5.13., 1.6.1., 1.6.4., 1.6.5., 1.7.
ATEX: 94/9/EC
APPLICABLE INTERNATIONAL STANDARDS:
Machinery: EN ISO 12100:2010 EN ISO 13732-1:2008
EN 626-1:2008 EN ISO 13857:2008
ATEX: EN 1127-1, EN 13463-1, EN 13463-5
NOTIFIED BODY
Det Norske Veritas, ATEX NB 0575 retains a copy of the Technical File
ATEX product marking: II 2 G c T1
The product described in this Declaration of Conformity complies with the Applicable European Directives and
relevant sections of the Applicable International Standards. The signature on this document authorizes the
distinctive European mark to be applied to the equipment described. A Technical Construction File is available for
inspection by designated bodies
Authorized Signature: Date:
Important safety information is contained in the installation, operation and service manuals; read and
understand this information prior to installing or using this equipment
This Document applies only to the equipment described above and is invalid if not reproduced in its
entirety.
EC Declaration of Conformity
www.carverpump.com
Phone: [phone]
Email: [e-mail]
Mike Moyer
Engineering Manager

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
SERVICE RECORD PAGE
Service No. ______________________ Model _________________________ Size and Type _______________
Customer Order No. ____________________________ Date Installed __________________________________
Installation Date Location Application
PUMP RATING
Capacity _____________________________________ Total Head ____________________________________
Suction Pressure ______________________________ Speed (RPM) __________________________________
Liquid pumped ________________________________ Temperature ___________________________________
Specific Gravity _______________________________ Viscosity ______________________________________
Service ______________________________________
PUMP MATERIALS
Casing _________________________ Impeller _______________________ Shaft _______________________
Gaskets _____________________________________ Bearing Frame _________________________________
Mechanical Seal/Packing ________________________
MOTOR DATA
Motor __________________________ Make _________________________ Serial No. ___________________
Type ___________________________ Frame ________________________ AC or DC ___________________
HP _____________________________ RPM _________________________ Volts _______________________
Phase __________________________ Cycles ________________________

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
NOTES ON INSPECTION AND REPAIRS
INSPECTION DATE REPAIR TIME REPAIRS COST REMARKS

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
TABLE OF CONTENTS
SECTION/PARAGRAPH PAGE
I. GENERAL DESCRIPTION ............................... 1
A. General Information ................................... 1
B. ATEX Directive 94/9/EC ............................. 1
C. Disclaimer .................................................. 1
D. Personnel Qualification and Training ......... 1
E. Pump Identification..................................... 1
F. Parts Inventory Guide ................................ 2
G. Parts Ordering ............................................ 2
II. SAFETY ............................................................ 2
A. Safety Precautions ..................................... 2
B. Summary of Safety Marking ....................... 2
C. Products Used in Potentially Explosive
Atmospheres ......................................... 2
D. Scope of Compliance ................................. 3
E. Safety Awareness ...................................... 3
F. Safety Instructions for the Operator/User .. 3
G. Safety Instructions for Maintenance
Inspection and Installation Work ............ 3
H. Non-Compliance with Safety Instructions .. 3
I. Unauthorized Modification and
Manufacture of Spare Parts ................... 4
J. Unauthorized Modes of Operation ............. 4
K. Explosion Protection .................................. 4
III. EQUIPMENT DESCRIPTION ........................... 6
IV. EFFECTS OF FLUIDS ..................................... 8
A. Net Positive Suction Head (NPSH) ............ 8
B. Changing Pump Speed .............................. 8
C. Effects of Viscosity ..................................... 8
D. Effects of Specific Gravity .......................... 8
V. TECHNICAL DATA ........................................... 8
VI. INSPECTION AND STORAGE ........................ 13
A. Inspection ................................................... 13
B. Packing for Return ..................................... 13
C. Storage of Pump ........................................ 13
VII. INSTALLATION ................................................ 14
A. Location ...................................................... 14
B. Handling ..................................................... 14
SECTION/PARAGRAPH PAGE
C. Foundation ................................................. 14
D. Leveling of Unit .......................................... 15
E. Grouting ..................................................... 15
F. Coupling Alignment .................................... 17
G. Pre-Installation Procedures ....................... 18
H. Piping ......................................................... 18
I. Auxiliary Piping Connection
and Gauges ........................................... 18
J. Motor .......................................................... 18
K. Direction of Rotation .................................. 18
VIII. OPERATION .................................................... 19
A. Pre-Start Cautions ..................................... 19
B. Priming ....................................................... 19
C. Starting the Pump ...................................... 20
D. Turbine Applications .................................. 20
E. Minimum/Maximum Flow Calculations ...... 20
F. Operating Checks ...................................... 20
G. Stopping the Pump .................................... 20
H. Indefinite Shutdown ................................... 21
IX. TROUBLESHOOTING OPERATING
PROBLEMS ...................................................... 21
X. MAINTENANCE ............................................... 23
A. Lubrication of Pump Ball Bearings ............. 23
B. Lubrication of Motor Ball Bearings ............. 24
C. Torque Values ............................................ 24
XI. SERVICE AND REPAIR ................................... 25
A. Preparations for Disassembly of Pump ..... 25
B. Disassembly of Pump ................................ 29
C. Parts Inspection ......................................... 33
D. Reassembly of Pump ................................. 34
E. Replacement of Wear Ring ........................ 35
F. Motor .......................................................... 38
G. Check Valve ............................................... 38
XII. PARTS LISTS AND DRAWINGS ..................... 38

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
TABLE OF CONTENTS - Continued
LIST OF TABLES
NUMBER TITLE PAGE
1. Fluid Temperature Limits ........................... 5
2. Basic Design Features ............................... 10
3. Key Mechanical Data ................................. 11
4. Permissible Nozzle Loads ......................... 12
5. Pumping Unit Troubleshooting .................. 21
6. Oil Recommendations................................ 24
7. Recommended Torque Values (ft-lbs) ....... 24
8. Recommended Equipment ........................ 24
9. Factory Wear Ring Clearance (Inches) ..... 34
10. Recommended Spare Parts List ................ 39
11. Parts List .................................................... 42
LIST OF ILLUSTRATIONS
NUMBER TITLE PAGE
1. Seal Chamber Dimensions .........................9
2. Sling Position for Moving Pump ..................14
3. Sling Position for Moving Pumping Unit .....14
4. Grouting and Foundation Bolting ................16
5. Unit Leveling ...............................................16
6. Coupling Alignment .....................................17
7. Constant Level Oiler ...................................24
8. Draining the Pumping Unit ..........................26
9. Preparation to Remove Back Pull-Out ........27
10. Remove Coupling .......................................28
11. Remove Back Pull-Out ...............................28
12. Back Pull-Out, Inboard Exploded View .......30
13. Back Pull-Out, Outboard Exploded View ....32
14. Inducer ........................................................39
15. Exploded View of Complete Pump
for Reference ..........................................40
16. Pump with Base ..........................................41
17. Wet End Low Flow High Head Option ........43
18. Flanged Drain and Discharge Option
with Plan 11 ............................................43

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
1
I. GENERAL DESCRIPTION AND
SAFETY PRECAUTIONS.
A. GENERAL INFORMATION. Carver Pump
Company products are carefully engineered and
manufactured and, if properly installed, maintained, and
operated, should provide maintenance-free operation
and a long service life.
CAUTION
These instructions must always be kept close
to the product's operating location or directly
with the product.
This manual is designed to provide sufficient material to
properly maintain the pumping unit. The information
presented should improve your knowledge and
understanding of the Maxum OH1, thus upgrading the
reliability, service life, and quality of pump maintenance.
These operating instructions are intended to facilitate
familiarization with the product and its permitted use to
help satisfy ATEX safety requirements. These operating
instructions do not take into account local regulations;
the operator must ensure that such regulations are
strictly observed by all, including the personnel called in
for installation. Compliance with such laws relating to
the proper installation and safe operation of the pumping
equipment is the responsibility of the equipment owner
and all necessary steps should be taken by the owner to
assure compliance with such laws before operating the
equipment. Always coordinate repair activity with
operations personnel and follow all plant safety
requirements and applicable safety and health
laws/regulations.
Refer to Figures 8 through 13, the exploded views and
Figure 16, pump with base, to locate the pump parts by
item number. Variations do exist between
configurations, not all parts described in the text may be
on your configuration.
CAUTION
These instructions should be read prior to
installing, operating, using and maintaining the
equipment in any region worldwide and in
conjunction with the main user instructions
provided. The equipment must not be put into
service until all the conditions relating to safety
instructions have been met.
B. ATEX DIRECTIVE 94/9/EC. It is a legal
requirement that machinery and equipment put into
service within certain regions of the world shall conform
to the applicable CE Marking Directives for Equipment
for Potentially Explosive Atmospheres (ATEX).
Where applicable the Directive covers important safety
aspects relating to the equipment, its use and the
satisfactory provision of technical documents. Where
applicable this document incorporates information
relevant to these Directives. To establish if the product
itself is CE marked for a Potentially Explosive
Atmosphere check the nameplate and the Certification
provided.
C. DISCLAIMER. Information in these User
Instructions is believed to be reliable. In spite of all the
efforts of Carver Pump Company to provide sound and
all necessary information the content of this manual may
appear insufficient and is not guaranteed by Carver
Pump Company as to its completeness or accuracy.
D. PERSONNEL QUALIFICATION AND TRAINING.
All personnel involved in the operation, installation,
inspection and maintenance of the unit must be qualified
to carry out the work involved. If the personnel in
question do not already possess the necessary
knowledge and skill, appropriate training and instruction
must be provided. If required, the operator may
commission the manufacturer/supplier to provide
applicable training.
Follow instructions in this manual carefully. Factory
warranty applies only when pump operates under
conditions as specified on order acknowledgment, and if
pump is properly installed and maintained as
recommended herein. A copy of this manual should be
available to operating personnel. Additional copies of
this manual are available upon request from Carver
Pump Company and your local distributor. For
comments and/or questions about information provided,
please contact Carver Pump Company or your local
distributor.
E. PUMP IDENTIFICATION. The type of pump, pump
size, operating data, and serial number are all stamped
on the nameplate attached to the pump. Pump
specifications should be recorded upon receipt of the
pumping unit. Record all necessary information on the
pump service record page and inspection and repair
record provided at the front of this manual. This
information must be included in all correspondence
regarding the unit. This will ensure that the correct pump
and/or parts are ordered in a timely manner.

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
2
F. PARTS INVENTORY GUIDE. To avoid
unnecessary delays for maintenance, spare parts
should be readily available, purchased before and kept
in stock, for normal service. Most conditions will be
covered if this manual is followed. For every one to
three pumps, stock one spare set consisting of items
listed in Table 10, Recommended Spare Parts. Part
numbers correspond to Figures 8 through 13, the
exploded views and Figure 16, pump with base.
G. PARTS ORDERING. When ordering replacement
parts, please specify:
 Serial number of pump (located on nameplate)
 Part name (located on parts list)
 Quantity of parts needed
Carver Pump Company may ship an interchangeable
part that is not identical in appearance or symbol. This is
done only if the part has been improved. Examine parts
carefully upon delivery before questioning factory or
company representative. Never return parts to the
factory without authorization from Carver Pump
Company.
If an impeller is ordered, specify diameter across blade
tips. Be sure diameter was NOT trimmed further than
diameter shown on Carver Pump Company records.
If a driver or driver parts are ordered, specify name of
manufacturer and all other data found on the driver
nameplate.
II. SAFETY.
A. SAFETY PRECAUTIONS. The manual is designed
to provide adequate instructions for the safe and
efficient installation, operation, or maintenance of the
pump. Failure or neglect to properly install, operate, or
maintain the pump may result in personal injury,
property damage, or unnecessary damage to the pump.
This manual must be read and understood both by the
installing personnel and the responsible trained
personnel/operators prior to installation and operation,
and it must always be kept close to the location of the
pumping unit for easy access.
B. SUMMARY OF SAFETY MARKING. The safety
instructions contained in this manual follow specific
ATEX safety marking where non-observance of the
instruction will cause a hazard is specially marked with
the symbol:
This symbol indicates explosive
atmosphere marking according to ATEX. It is
used in safety instructions where non-
compliance in the hazardous area would cause
the risk of an explosion.
General hazard sign to ISO 7000 - 0434.
The word "Caution" is used to introduce safety
instructions whose non-observance may lead to damage
to the machine and its functions.
The word "WARNING" is used to introduce safety
instructions whose non-observance may lead to a
potential hazard exists, capable of producing injury to
personnel, if approved procedures are not followed.
The word “DANGER” indicates a location, equipment, or
system where imminent hazards exist, capable of
producing immediate injury or death to personnel, if
approved procedures are not followed.
Instructions attached directly to the machine, e.g.
 Arrow indicating the direction of rotation
 Markings for fluid connections must always be
complied with and be kept in a perfectly legible
condition at all times.
Observe all notes, caution, warning or danger tags
attached to the equipment or included in this manual.
C. PRODUCTS USED IN POTENTIALLY EXPLOSIVE
ATMOSPHERES
Measures are required to:
 Avoid excess temperature
 Prevent buildup of explosive mixtures
 Prevent the generation of sparks
 Prevent leakages
 Maintain the pump to avoid hazard
The following instructions for pumps and pump units
when installed in potentially explosive atmospheres
must be followed to help ensure explosion protection.
Both electrical and non-electrical equipment must meet
the requirements of European Directive 94/9/EC.

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
3
D. SCOPE OF COMPLIANCE.
Use equipment only in the zone for which
it is appropriate. Always check that the driver,
drive coupling assembly, seal and pump
equipment are suitably rated and/or certified for
the classification of the specific atmosphere in
which they are to be installed.
Where Carver Pump has supplied only the bare shaft
pump, the Ex rating applies only to the pump. The party
responsible for assembling the pump set shall select the
coupling, driver, seal and any additional equipment, with
the necessary CE Certificate/Declaration of Conformity
establishing it is suitable for the area in which it is to be
installed.
The output from a variable frequency drive (VFD) can
cause additional heating affects in the motor and so, for
pump sets with a VFD, the ATEX Certification for the
motor must state that it covers the situation where
electrical supply is from the VFD. This particular
requirement still applies even if the VFD is in a safe
area.
E. SAFETY AWARENESS. It is imperative to comply
with the safety instructions contained in this manual, the
relevant national and international explosion protection
regulations, health and safety regulations and the
operator’s own internal work, operation and safety
regulations.
Ex symbol relates to additional
requirements which must be adhered to when
the pump is operated in potentially explosive
atmospheres.
F. SAFETY INSTRUCTIONS FOR THE OPERATOR
/USER.
 Any hot or cold components that could pose a
hazard must be equipped with a guard by the
operator.
 Guards which are fitted to prevent accidental
contact with moving parts (e.g. coupling) must
not be removed whilst the unit is operating.
 Leakages (e.g. at the bearing isolators) of
hazardous fluids (e.g. explosive, toxic, hot) must
be contained so as to avoid any danger to
persons or the environment. Pertinent legal
provisions must be adhered to.
 Electrical hazards must be eliminated. (In this
respect refer to the relevant safety regulations
applicable to different countries and/or the local
energy supply companies.)
If the pumps/units are located in
potentially explosive atmospheres, it is
imperative to make sure that unauthorized
modes of operation are prevented. Non-
compliance may result in the specified
temperature limits being exceeded.
G. SAFETY INSTRUCTIONS FOR MAINTENANCE,
INSPECTION AND INSTALLATION WORK. The
operator is responsible for ensuring that all
maintenance, inspection and installation work be
performed by authorized, qualified personnel who are
thoroughly familiar with the manual and pumping unit.
To ensure safe operation the radial and
thrust ball bearings must be replaced at 25,000
hours of service or whenever the mechanical
seal is inspected or serviced.
The pumping unit must have cooled down to ambient
temperature, pump pressure must have been released
and the pump must have been drained before working
on any pumping unit. Work on the pumping unit must be
carried out during shutdown. The shutdown procedure
described in the manual for taking the unit out of service
must be adhered to.
Pumps handling fluids that are hazardous to personnel
must be decontaminated prior to being worked on.
Immediately following completion of the work, all safety
relevant and protective devices must be reinstalled
and/or reactivated. Please observe all instructions set
out in the section on start-up before returning the
pumping unit to service.
H. NON-COMPLIANCE WITH SAFETY
INSTRUCTIONS. Non-compliance with safety
instructions may result in personal injury, property
damage, or unnecessary damage to the pumping unit.
Non-compliance with these safety instructions will also
lead to forfeiture of any and all rights to claims for
damages. Non-compliance, can for example, result in:
 Failure of important pumping unit functions.
 Failure of prescribed maintenance and servicing
practices.
 Hazard to personnel by electrical, mechanical,
and chemical effects as well as explosion.
 Hazard to the environment due to leakage of
hazardous substances.

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
4
I. UNAUTHORIZED MODIFICATION AND
MANUFACTURE OF SPARE PARTS. Modifications or
alterations of the pumping unit supplied are only
permitted after consultation with Carver Pump and to the
extent permitted by Carver Pump. Original spare parts
and accessories authorized by Carver Pump ensure
safety. The use of other parts can invalidate any liability
of Carver Pump for consequential damage and/or
warranty.
J. UNAUTHORIZED MODES OF OPERATION. The
warranty relating to operating reliability and safety of the
unit supplied is only valid if the pumping unit is used in
accordance with its designated use as described in the
following sections. The limits stated on the nameplate
must not be exceeded under any circumstances.
K. EXPLOSION PROTECTION. If the pumps/units are
installed in potentially explosive atmospheres, the
measures and instructions given in the following
sections K.1 to K.6 must be adhered to without fail, to
ensure explosion protection.
K.1 Unit Fill.
It is assumed that the system of suction
and discharge lines and thus the wetted pump
internals are completely filled with the fluid to
be handled at all times during pump operation,
so that an explosive atmosphere is prevented.
If the operator cannot warrant this
condition, appropriate monitoring devices must
be used.
CAUTION
In addition, it is imperative to make sure that
the seal chambers, auxiliary systems of the
shaft seal and the heating and cooling systems
are properly filled.
K.2 Marking.
The marking on the pump only refers to
the pump, i.e. the coupling and driver must be
regarded separately. The coupling must have
an EC manufacturer’s declaration. The driver
must be regarded separately.
An example of ATEX equipment marking is shown
below. The actual classification of the pump will be
engraved on the nameplate.
II 2 GD c IIC 135 ºC (T4)
Equipment Group
I = Mining
II = Non-mining
Category
2 or M2 = high level protection
3 = normal level of protection
Gas and/or dust
G = Gas
D = Dust
c = Constructional safety
(in accordance with EN13463-5)
Gas Group (Equipment Category 2 only)
IIA – Propane (typical)
IIB – Ethylene (typical)
IIC – Hydrogen (typical)
Maximum surface temperature (Temperature Class)
(Refer to Section II, Paragraph K.5)
K.3 Checking the Direction of Rotation.
If the explosion hazard also exists during
the installation phase, the direction of rotation
must never be checked by starting up the
unfilled pump unit, even for a short period, to
prevent temperature increases resulting from
contact between rotating and stationary
components.
K.4 Pump Operating Mode.
Make sure that the pump is always started with the
suction-side shut-off valve fully open and the discharge-
side shut-off valve slightly open. However, the pump can
also be started up against a closed swing check valve.
The discharge-side shut-off valve shall be adjusted to
comply with the duty point immediately following the run-
up process.

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
5
Pump operation with the shut-off valves in
the suction and/or discharge pipes closed is not
permitted.
CAUTION
In this condition, there is a risk of the pump
casing taking on high surface temperatures
after a very short time, due to a rapid
temperature rise in the pumped fluid inside the
pump. Additionally, the resulting rapid pressure
build-up inside the pump may cause excessive
stresses on the pump materials or even
bursting.
The minimum flows calculated in Section VIII,
Paragraph E, refer to water and water-like liquids.
Longer operating periods with these liquids and at the
flow rates indicated will not cause an additional increase
in the temperatures on the pump surface. However, if
the physical properties of the fluids handled are different
from water, it is essential to check if an additional heat
build-up may occur and if the minimum flow rate must
therefore be increased.
To check, proceed as described in Section VIII,
Paragraph E.
In addition, the instructions given in Section VIII of this
operating manual must be observed.
Mechanical seals may exceed the
specified temperature limits if run dry. Dry
running may not only result from an
inadequately filled seal chamber, but also from
excessive gas content in the fluid handled.
Pump operation outside its specified operating range
may also result in dry running.
K.5 Temperature Limits.
In normal pump operation, the highest
temperatures are to be expected on the surface
of the pump casing, at the shaft seal and in the
ball bearing areas. The surface temperature at
the pump casing corresponds to the
temperature of the fluid handled.
If the pump is heated, it must be ensured that the
temperature classes stipulated for the plant are
observed.
In the ball bearing bracket area, the unit surfaces must
be freely exposed to the atmosphere and the fan inlet
flow must be unimpeded.
In any case, responsibility for compliance
with the specified fluid temperature (operating
temperature) lies with the plant operator. The
maximum permissible fluid temperature
depends on the temperature class to be
complied with.
Table 1 below lists the temperature classes to EN
13463-1 and the resulting theoretical temperature limits
of the fluid handled. In stipulating these temperatures,
any temperature rise in the shaft seal area has already
been taken into account.
Table 1. Fluid Temperature Limits
Temperature class
to EN 13463-1:
Temperature limit of
fluid handled
T5 185 °F (85 °C)
T4 284 °F (120 °C)
T3 300 °F (149 °C)
CAUTION
The permissible operating temperature of the
pump in question is indicated on the data
sheet. If the pump is to be operated at a higher
temperature, the data sheet is missing or if the
pump is part of a pool of pumps, the maximum
permissible operating temperature must be
enquired from the pump manufacturer.
Based on an ambient temperature of 104˚ Fahrenheit
(F) [40˚ Celsius (C)] and proper maintenance and
operation, compliance with temperature class T4 is
warranted in the area of the rolling element ball
bearings. A special design is required for compliance
with temperature class T6 in the ball bearing area. In
such cases, or if ambient temperature exceeds 104˚F
(40˚C), contact the manufacturer.

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
6
K.6 Maintenance.
Only a pumping unit which is properly
serviced and maintained in perfect technical
condition will give safe and reliable operation.
This also applies to the reliable function of the thrust and
radial ball bearings whose actual lifetime largely
depends on the operating mode and operating
conditions. Regular checks of the lubricant and the
running noises will prevent the risk of excessive
temperatures as a result of the thrust or radial ball
bearings running hot or defective bearing deflectors.
The correct function of the bearing deflectors must be
checked regularly. Any auxiliary systems installed must
be monitored, as necessary, to make sure that they
function correctly.
K.7 General Safety Instructions.
 Various federal, state, and local laws affect
installation, use, and operation of pumping
equipment. Compliance with such laws relating
to proper installation and safe operation of
pumping equipment is the responsibility of the
equipment owner.
 Prior to working on pump or driver, ensure all
switches and circuit breakers have been locked
in the open (off) position and tagged, “Out of
Service.”
 All circuits NOT known to be dead must be
considered live at all times.
 DO NOT wear loose or torn clothing around
rotating machines.
 While working near electricity, DO NOT use
metal rules, flashlights, metallic pencils, or any
other objects having exposed conducting
material.
 Make sure you are NOT grounded while
adjusting electrical equipment or using
measuring equipment.
 In general, use only one hand when servicing
live electrical equipment.
 Make sure to de-energize all electrical
equipment before connecting or disconnecting
meters or test leads.
 For connecting a meter to terminals for
measurement, use a range higher than the
expected voltage.
 Check to make sure that the frame of the driver
and starter panel are securely grounded before
operating pumping unit or performing any tests
or measurements.
 If a test meter must be held or adjusted while
voltage is applied, ground case of meter before
starting measurement. DO NOT touch live
equipment while holding the meter. Some
moving vane-type meters should not be
grounded nor held during measurements.
 DO NOT use test equipment known to be
damaged or in poor condition.
The following specific safety precautions apply to the
pumping unit:
 DO NOT exceed maximum discharge pressure.
III. EQUIPMENT DESCRIPTION.
The Maxum OH1 is our process pump for handling
hydrocarbons in refining and process industry
applications. It is offered as a foot mounted unit.
Hydraulic performance extends to 9,000 GPM and 720
feet of head. The design is restricted as noted below.
The Maxum OH1 unit consists of a pump, base,
coupling, coupling guard and a driver unit. The driver is
usually an electric motor, but can be a steam turbine or
any other power conversion device that can provide the
required horsepower at the proper RPM. Drivers other
than electric motors must be reviewed for compliance
with the applicable directives.
The Maxum OH1 is supplied with a casing that should
always be mounted solidly on an adequate bedplate. No
shims should be used under the feet of the casing.
The Maxum OH1 is designed as a back pullout unit.
Therefore it should always be used with a spacer
coupling. The spacer width should permit the entire
rotating assembly to be removed from the casing.
Normally the casing should be left in place on the base
and remain connected to the suction and discharge
piping.
The bare pump consists of following major parts and
options. Refer to Figures 8 through 13, the exploded
views and Figure 16, Pump with Base, drawings for the
location of parts identified by item numbers.
Item 1 - Casing. The casing (1) houses the impeller (2)
and wear ring (7*) and consists of the suction inlet, and
discharge nozzle. The back cover (11) is held in place
between the casing and the bearing frame (19). The
casing is fastened to the back cover with casing/back
cover studs (820D) and casing hex nuts (830F).

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
7
Item 2 or 3 - Impeller. Maxum pumps are equipped
with enclosed impellers, except the low-flow high-head
Maxum pumps that are equipped with open impellers.
The impeller (2 or 3) is keyed to the shaft (6) by the
impeller key (32A) and is locked in place by the impeller
washer (28) and impeller nut (24) or optional inducer
(*246).
Item 6 – Shaft. The shaft (6) of the Maxum pump is
designed for maximum deflection of 0.002 inch at the
face of the mechanical seal (90). The shaft is also
designed to provide stabilization to the rotor system
when pump operates away from the best efficiency
point. A coupling (42) connects the shaft to the driver
(200) shaft. The pump coupling key (32C) holds the
coupling in place, causing it to rotate with the shaft.
Item 11 – Back Cover. The back cover (11) is fastened
to the casing (1) with casing/back cover studs (820D)
and casing hex nuts (830F). The back cover houses the
back cover wear ring (7A). The back cover is sealed in
the casing by the casing gasket (*73D) or O-ring
(*700B).
The bearing frame (19) is attached to the back cover
(11) with back cover stud (820E) and back cover hex nut
(830F).
The back cover (11) contains forcing bolts (808A) to aid
in loosening the back cover from the casing (1).
Item 16 and 18 – Ball Bearings. A deep-groove
Conrad-type, C3 internal fit radial ball bearing (16) and
light preload, back-to-back mounted thrust ball bearings
(18) are housed in the bearing frame (19). Thrust ball
bearings will be duplex 40° angular contact ball
bearings. The thrust ball bearing is held in place by the
bearing locknut (22) and bearing lockwasher (69). The
ball bearings are oil lubricated. Either oil bath lubrication
or an oil mist system may be employed.
Item 19 – Bearing Frame. The principal function of the
bearing frame (19) is to carry the loads from the liquid
end of the pump to the base and to transport power from
the power unit to the impeller (2). The bearing frame has
a radial ball bearing (16) located in the front end of the
bearing frame (nearest to the casing) and a pair of
back-to-back mounted angular contact thrust ball
bearings (18) in the rear of the bearing frame. This
bearing frame is designed to be oil lubricated, which can
be accomplished in several ways.
The first method involves the use of a sight glass
constant level oiler (890A). The sight glass maintains
the oil level high enough on the higher of the two
bearings so that the bearings themselves provide the
motivation for the oil to be moved through the races of
the bearings.
A second method is to provide an oil flinger (*60) which
mounts on the shaft (6) and literally flings the oil
throughout the bearing frame. An oil view sight (*143) is
usually used with this system to make sure that the oil
level within the frame can be observed and maintained
at the proper level.
A third method is the oil mist system. All Maxum pumps
are equipped so that they can be used or can be
converted to oil mist units without any field machining-.
Oil Mist system for ATEX applications
require a user installed system of safety
controls or alarms to ensure that the pump is
shut down in event of an oil mist failure.
In addition to the oil lube system, the bearing frame (19)
contains the deflector seals (715 & 716). The Maxum
pump bearing frame is equipped with a labyrinth oil seal
assembly which becomes a static seal when stopped.
Item 23 – Base. The base (23) is designed to provide
adequate support for the pump and motor so pump can
be operated without base deflection, excessive
vibration, or resonance. The casing (1) is attached to the
base with bolts (808D) and lockwashers (840J).
Grouting of this type of base is required by Carver Pump
Company.
Item 90 – Mechanical Seal. Cartridge mechanical
seals (90) are to be used. Complete cartridge
mechanical seal instructions should be obtained from
the seal manufacturer. The standard seal chamber
dimensions are shown in Figure 1.

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
8
IV. EFFECTS OF FLUIDS.
Solids pumped in the fluid may cause
internal damage to pump casing and damage
to the seal faces with resulting hazardous
conditions. Care is to be taken to ensure that
the process fluid is clear of solids and debris.
A. NET POSITIVE SUCTION HEAD (NPSH). Any
liquid, hot or cold, must be pushed into the impeller of
the pump by some absolute pressure, such as the
atmosphere or the vessel pressure from which the pump
takes its action.
The head in feet of liquid necessary to maintain the
required flow into the pump is called the Net Positive
Suction Head (NPSH). This value is measured above
the vapor pressure of the liquid at the pumping
temperature.
NPSH is commonly expressed in two ways: the NPSH
required by the pump, and shown on the pump curve, is
the head needed to cover the losses in the pump
suction and the energy required to enable the liquid to
climb onboard the leading edge of the impeller vane.
The NPSH available is that inherent in the system,
taking into account friction losses in suction piping,
valves, fittings, etc. In all cases, the NPSH available,
measured above vapor pressure, must exceed the
NPSH required in order to push the liquid into the pump.
B. CHANGING PUMP SPEED. Changing the speed of
a centrifugal pump affects the capacity, total head,
NPSH required and the brake horsepower. In general,
the capacity will vary in a direct ratio with the speed,
whereas the total head and NPSH required will vary as
the ratio of the speed squared. The brake horsepower
will vary as the ratio of the speed cubed.
C. EFFECTS OF VISCOSITY. The pump is designed
to deliver rated capacity at rated head for a liquid with a
particular viscosity. When pump is handling heavy
viscous liquid, the viscosity of the liquid must allow it to
be pumped easily. The liquid may have to be heated
prior to starting the pump. When contemplating
operation at some viscosity other than that for which the
pump was originally designed, check with Carver Pump
Company.
D. EFFECTS OF SPECIFIC GRAVITY. The capacity
and total head in feet of liquid developed by a centrifugal
pump are fixed for every point on the curve and are
always the same for the same speed. Neither capacity
nor total head will be affected by a change in the
specific gravity of the liquid pumped. However, since the
discharge pressure in Pounds per Square Inch (PSI)
and the brake horsepower required driving the pump are
functions of the specific gravity of the liquid, both will be
affected in direct proportion by any change in specific
gravity. Therefore, an increase in specific gravity will
raise the discharge pressure and is dangerous as it
might overload the pump's driver or exceed the pump
casing allowable pressure.
V. TECHNICAL DATA.
Specifications and operating limits should be recorded
on a Service Record Page; an example is located in the
front matter of this manual. Record the necessary
information upon receipt of the pumping unit.
Seal Chamber Dimensions. Standard seal chamber
dimensions are located in Figure 1 and are arranged by
bearing frame number.
Basic Design Features. Basic design features of the
pump are located in Table 2 and are arranged by pump
size.
Key Mechanical Data. Key mechanical data for the
pump is located in Table 3 and is arranged by bearing
frame number.
Permissible Nozzle Loads. The forces and moments
in Table 4 are to be understood as the limit for a single
acting force or moment along the particular coordinate
axes or any resultant of two or more forces and
moment.

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
9
Seal Chamber Dimensions (Inches)
Bearing
Frame
Number
Pump
Size
Shaft
Diameter
d1
Box Bore
d2
Stud
Circle
d3
Max Gland
Diameter
d4
Total
Length
C
Clear
Length
E
Box
Depth
C-E
Stud Size
(Qty = 4)
3 6 1.5748/1.5742 3.5430/3.5444 4.921 6.625 6.500 4.000 2.500 1/2”-13UNC
4 8 1.9685/1.9679 3.9370/3.9384 5.512 6.625 6.900 4.400 2.500 5/8”-11UNC
5 10 2.3622/2.3615 4.7244/4.7258 6.300 7.750 6.900 4.400 2.500 5/8”-11UNC
6 13 2.5000/2.4995 5.1181/5.1197 6.693 7.750 6.900 4.400 2.500 5/8”-11UNC
8 16 & 20 3.5433/2.5424 6.2992/6.3008 8.070 10.875 7.290 4.790 2.500 3/4”-10UNC
Figure 1. Seal Chamber Dimensions

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
10
Table 2. Basic Design Features
Pump Size Bearing
Frame
Max
Speed
(RPM)
1st
Critical
Speed
(RPM)
Casing Design Shaft Deflection @ 20%
BEP Shaft
Stiffness
L3/D4
WK2 @ Max.
Impeller Dia.
*Discharge Volute(s) @ Seal (in.) @ Impeller (in.)
AA- 1½ x 1 x 6 3 3500 13068 Centerline Single 0.0002 0.0009 183.3 9.500
AB - 2 x 1½ x 6 3 3500 12098 Centerline Single 0.0006 0.0019 183.3 10.45
AC- 3 x 1½ x 6 3 3500 11317 Centerline Single 0.0006 0.0021 183.3 11.40
AD - 3 x 2 x 6 3 3500 12098 Centerline Single 0.0011 0.0036 183.3 10.45
AE - 4 x 3 x 6 3 3500 10122 Centerline Dual 0.0021 0.0070 183.3 15.20
BA - 1½ x 1 x 8 4 3500 12262 Centerline Single 0.0003 0.0011 83.6 34.31
BB - 2 x 1½ x 8 4 3500 10754 Centerline Single 0.0005 0.0017 83.6 41.42
BC - 3 x 1½ x 8 4 3500 11193 Centerline Single 0.0006 0.0022 83.6 39.05
BD - 3 x 2 x 8 4 3500 11193 Centerline Single 0.0008 0.0029 83.6 39.05
BE – 4 x 3 x 8 4 3500 10363 Centerline Dual 0.0004 0.0014 83.6 43.79
BF - 6 x 4 x 8 4 3500 10012 Centerline Dual 0.0005 0.0017 83.6 46.16
CA – 2 x 1½ x 10 5 3500 13192 Centerline Single 0.0002 0.0012 42.3 92.29
CB - 3 x 1½ x 10 5 3500 13192 Centerline Single 0.0002 0.0011 42.3 92.29
CC - 3 x 2 x 10 5 3500 12773 Centerline Single 0.0004 0.0022 42.3 92.29
CD - 4 x 3 x 10 5 3500 12042 Centerline Quad 0.0006 0.0032 42.3 108.6
CE - 6 x 4 x 10 5 3500 10429 Centerline Dual 0.0002 0.0012 42.3 141.3
CF - 6 x 6 x 10 5 1750 8288 Centerline Dual 0.0002 0.0010 42.3 141.3
CG - 8 x 6 x 10 5 1750 10020 Centerline Dual 0.0002 0.0012 42.3 152.2
DA - 2 x 1½ x 13 6 3500 11224 Centerline Single 0.0003 0.0019 35.0 209.6
DB - 3 x 2 x 13 6 3500 8511 Centerline Single 0.0005 0.0026 35.0 201.8
DC - 4 x 3 x 13 6 3500 9515 Centerline Quad 0.0009 0.0054 35.0 263.8
DD - 6 x 4 x 13 6 3500 9098 Centerline Dual 0.0002 0.0013 35.0 287.1
DE - 6 x 6 x 13 6 1750 8306 Centerline Dual 0.0002 0.0010 35.0 310.3
DF - 8 x 6 x 13 6 1750 7130 Centerline Dual 0.0003 0.0016 35.0 310.3
DG - 10 x 8 x 13 6 1750 6728 Centerline Dual 0.0004 0.0023 35.0 418.9
DH – 12 x 10 x 13 6 1750 6215 Centerline Dual 0.0008 0.0043 35.0 418.9
ED- 6 x 4 x 16 8 1750 8223 Centerline Dual 0.0001 0.0005 19.5 563.6
EA- 8 x 6 x 16 8 1750 7885 Centerline Dual 0.0001 0.0011 19.5 647.3
EB - 10 x 8 x 16 8 1750 9053 Centerline Dual 0.0001 0.0012 19.5 595.9
EE - 12 x 10 x 16 8 1750 7840 Centerline Dual 0.0001 0.0006 19.5 722.6
EC - 14 x 12 x 16 8 1750 7752 Centerline Dual 0.0004 0.0035 19.5 849.4
FA - 8 x 6 x 20 8 1750 7478 Centerline Dual 0.0001 0.0012 19.5 1232.0
FB - 10 x 8 x 20 8 1750 7288 Centerline Dual 0.0002 0.0018 19.5 1495.0
FC - 12 x 10 x 20 8 1750 6714 Centerline Dual 0.0003 0.0026 19.5 1859.0
FD - 14 x 12 x 20 8 1750 6075 Centerline Dual 0.0005 0.0039 19.5 2298.0
*Low-flow high-head casing discharge design is tangential.

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
11
Table 3. Key Mechanical Data
Item Bearing Frame
3 4 5 6 8
Max power (BHP) @ 3500 RPM 150 240 550 550 -
@ 1750 RPM 75 120 275 275 1500
@ 1150 RPM 50 80 180 180 1000
Bearing type - radial ball bearing 6211 6211 6213 6213 6219
thrust ball bearing 7311 7311 7313 7313 7318
Lubrication method (standard) Oil - ISO Grade 22, 32 or 68
L10 bearing life (hrs) - radial 50,000
thrust 50,000
Radial to thrust ball bearing centerline (in.) 5.192 5.192 8.939 8.939 13.198
Shaft diameter (in.) @ coupling 1.375 1.375 2.000 2.000 3.000
@ impeller hub (standard ext.) 1.000 1.375 1.375 1.875 2.375
@ radial ball bearing 2.166 2.166 2.559 2.559 3.741
@ thrust ball bearing 2.166 2.166 2.559 2.559 3.544
@ seal box 1.575 1.968 2.362 2.500 3.543
Coupling Key – width (in.) 0.313 0.313 0.500 0.500 0.750
length (in.) 2.625 2.625 2.000 2.000 5.000

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
12
Table 4. Permissible Nozzle Loads
Pump Size Suction Discharge
Fx Fy Fz Mx My Mz Fx Fy Fz Mx My Mz
AA- 1½ x 1 x 6 200 160 130 340 170 260 160 130 200 340 170 200
AB - 2 x 1½ x 6 200 160 130 340 170 260 160 130 200 340 170 200
AC- 3 x 1½ x 6 300 240 200 700 350 530 160 130 200 340 170 200
AD - 3 x 2 x 6 300 240 200 700 350 530 160 130 200 340 170 200
AE - 4 x 3 x 6 400 320 260 980 500 740 240 200 300 700 350 530
BA - 1½ x 1 x 8 200 160 130 340 170 260 160 130 200 340 170 200
BB - 2 x 1½ x 8 200 160 130 340 170 260 160 130 200 340 170 200
BC - 3 x 1½ x 8 300 240 200 700 350 530 160 130 200 340 170 200
BD - 3 x 2 x 8 300 240 200 700 350 530 160 130 200 340 170 200
BE – 4 x 3 x 8 400 320 260 980 500 740 240 200 300 700 350 530
BF - 6 x 4 x 8 700 560 460 1700 870 1,300 320 260 400 980 500 740
CA – 2 x 1½ x 10 200 160 130 340 170 260 160 130 200 340 170 200
CB - 3 x 1½ x 10 300 240 200 700 350 530 160 130 200 340 170 200
CC - 3 x 2 x 10 300 240 200 700 350 530 160 130 200 340 170 200
CD - 4 x 3 x 10 400 320 260 980 500 740 240 200 300 700 350 530
CE - 6 x 4 x 10 700 560 460 1700 870 1,300 320 260 400 980 500 740
CF - 6 x 6 x 10 700 560 460 1700 870 1,300 560 460 700 1700 870 1300
CG - 8 x 6 x 10 1100 850 700 2600 1,300 1,900 560 460 700 1700 870 1300
DA - 2 x 1½ x 13 200 160 130 340 170 260 160 130 200 340 170 200
DB - 3 x 2 x 13 300 240 200 700 350 530 160 130 200 340 170 200
DC - 4 x 3 x 13 400 320 260 980 500 740 240 200 300 700 350 530
DD - 6 x 4 x 13 700 560 460 1700 870 1,300 320 260 400 980 500 740
DE - 6 x 6 x 13 700 560 460 1700 870 1,300 560 460 700 1700 870 1300
DF - 8 x 6 x 13 1100 850 700 2600 1,300 1,900 560 460 700 1700 870 1300
DG - 10 x 8 x 13 1500 1200 1000 3700 1800 2800 850 700 1100 2600 1,300 1,900
DH – 12 x 10 x 13 1800 1500 1200 4500 2200 3400 1200 1000 1500 3700 1800 2800
ED- 6 x 4 x 16 700 560 460 1700 870 1,300 320 260 400 980 500 740
EA- 8 x 6 x 16 1100 850 700 2600 1,300 1,900 560 460 700 1700 870 1300
EB - 10 x 8 x 16 1500 1200 1000 3700 1800 2800 850 700 1100 2600 1,300 1,900
EE - 12 x 10 x 16 1800 1500 1200 4500 2200 3400 1200 1000 1500 3700 1800 2800
EC - 14 x 12 x 16 2000 1600 1300 4700 2300 6300 1,500 1200 1800 4500 2200 3400
FA - 8 x 6 x 20 1100 850 700 2600 1,300 1,900 560 460 700 1700 870 1300
FB - 10 x 8 x 20 1500 1200 1000 3700 1800 2,870 850 700 1100 2600 1,300 1,900
FC - 12 x 10 x 20 1800 1500 1200 4500 2200 3400 1200 1000 1500 3700 1800 2800
FD - 14 x 12 x 20 2000 1600 1300 4700 2300 6300 1,500 1200 1800 4500 2200 3400
M = Moments measured in Foot-Pounds (FT-lbs)
F = Forces measured in Pounds (lbs)
Y
X
Z
Y
X
Z

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
13
VI. INSPECTION AND STORAGE.
A. INSPECTION. Upon receipt of the shipment,
unpack and inspect the pumping unit and individual
parts to insure none are missing or damaged. Carefully
inspect all boxes and packing material for loose parts
before discarding them. Check to make sure the
shipment complies with the purchase order. Immediately
report any missing parts or damage incurred during
shipment to the factory and to the Transportation
Company and file your “damage and/or lost in shipment”
claim with the carrier.
B. PACKING FOR RETURN. If the pumping unit is
sent back to Carver Pump Company for repair, drain the
unit, and re-seal all flanges and connections that were
covered or plugged. Ship the pump(s) in an assembled
condition to prevent damage to sealing faces of
individual components. A Return Goods Authorization
(RGA) and a Safety Data Sheet (SDS) is required on all
returned pumps. Copies of SDS records should be kept
and maintained by the customer. The customer is
responsible for cleaning and flushing the pump before it
is returned to the factory. Make sure to specify the fluid
used in the service.
C. STORAGE OF PUMP. If the equipment is not to be
immediately installed and operated, store it in a clean,
dry, well ventilated place, free from vibrations, moisture
and rapid or wide variations in temperature.
NOTE
Storage requirements vary depending on
climatic environment, length of storage and
equipment. For storage periods of three months
or longer, contact manufacturer for specific
instructions. Improper storage could damage
equipment and would result in non-warranty
covered restoration of non-warranty covered
product failures.
When storing the pump up to three months rotate the
shaft for several revolutions at least once per month to
coat the ball bearings with lubricant, retard oxidation and
corrosion, and prevent possible false brinelling.
The motor ball bearings should be prepared for storage
according to the motor manufacturer’s instructions, in
the motor manufacturer’s maintenance manual, which
should come with the motor.
CAUTION
For shipment and long-term storage purposes
the pump ball bearing shall be fogged once
every 30 days during storage with a rust
retardant compatible with the oil used in the
system to prevent rusting.
A pump which is made of iron or steel that sits
in extreme heat, high humidity, or full or
partially full of water over 30 days will rust and
will most likely seize. If the pump rusts and/or
seizes, a complete overhaul and repair may be
necessary to refurbish the pump.
Consider a unit to be in storage when:
1. It has been delivered to the job site and is
waiting to be installed.
2. It has been installed but operation is delayed
pending completion of construction.
3. There are long (30 days or more) periods
between operating cycles.
4. The plant (or department) is shut down for
periods of longer than 30 days.
Measures to be taken for prolonged shutdown of
installed pumping unit. If the pumping unit remains
installed a periodic check of operation is in order to
make sure that the pump is always ready for instant
start-up and to prevent the formation of deposits within
the pump and the pump intake area. Start up the
pumping unit regularly once a month for a short time
(approximately 5 minutes) during prolonged shutdown
periods. Prior to operation check run ensure that there is
sufficient liquid available for operating the pump.
Interim Storage (Indoors)/ Preservation. When the
unit is temporarily put into storage, only the wetted low
alloy must be preserved. Commercially available
preservatives can be used for this purpose. Please
observe the manufacturer’s instructions for
application/removal.
The unit/pump should be stored in a dry room where the
atmospheric humidity is as constant as possible.
If stored outdoors, the unit and crates must be covered
by waterproof material to avoid any contact with
humidity.
Protect all stored goods against humidity, dirt, vermin
and unauthorized access!

Maxum OH1 – I-402
End Suction Process Pump 402 – 17.04.EN
14
All openings of the assembled unit components are
closed and must only be opened when required during
installation.
All blank parts and surfaces of the pump are oiled or
greased (silicone-free oil and grease) to protect them
against corrosion.
VII. INSTALLATION.
A. LOCATION. The pump assembly should be
located in an area that will permit periodic inspection
and maintenance. Head room and access should be
provided and all units should be installed in a dry
location with adequate drainage.
The pump assembly should be installed as close to the
fluid as possible. A short, direct suction pipe can be
used to keep suction losses at a minimum. If possible,
locate the pump so fluid will flow by gravity to the
suction opening. The discharge piping should be direct
with as few elbows and fittings as possible. The total Net
Positive Suction Head Available (NPSHA), which
includes the suction lift and pipe friction losses, must be
greater than the Net Positive Suction Head Required
(NPSHR) by the pump.
B. HANDLING.
WARNING
If the pumping unit slips out of the sling
arrangement, it may cause injury to personnel
and/or damage to the pumping unit.
CAUTION
Use a hoist with adequate lifting capacity.
Do not pick up the complete unit by the motor
or the pump shafts or motor lifting eyes.
Moving the unit requires proper preparation and
handling. Always make sure that the pump or the
pumping unit remains in a horizontal position while
being moved and cannot slip out of the transport
suspension arrangement. Use a sling for pumps without
baseplates, refer to Figure 2. To lift a horizontal
mounted unit, a hoist or suitable lifting device should be
attached to each corner of base structure, refer to
Figure 3. The individual motor may be lifted using proper
eyebolts provided by the manufacturer, but these should
not be used to lift the assembled unit.
Figure 2. Sling Position for Moving Pump
Figure 3. Sling Position for Moving Pumping unit
C. FOUNDATION. Make sure that the concrete
foundation has set firmly before placing the unit on it. Its
surface must be truly horizontal and even. The
foundation bolts must be inserted in the base holes. The
foundation should be 3 to 6 inches wider and longer
than the base, have a level surface, and be of sufficient
mass to prevent vibration and form a permanent rigid
support for the unit. The best foundations are concrete
with anchor bolts of adequate size embedded in the
foundation in pipe sleeves having an inside diameter 2-
1/2 times larger than the bolt diameter. This will allow for
accurate positioning of the unit. Keep the concrete
surface clean, yet rough.
Hydraulic Institute (HI) recommends a foundation
capable of absorbing vibration at least five times the
weight of the pumping unit and to form a permanent,
rigid support for the base plate. Consequently,
maintaining the pump to driver alignment is important for
a flexible coupled unit, refer to Figure 6. A concrete
foundation on a solid base is recommended. Use
foundation bolts of the proper size embedded into the
concrete. A pipe sleeve larger in diameter than the bolt
should be used. This allows movement for final
positioning of the bolts. Refer to Figure 4, Grouting and
Foundation Bolting.
As soon as the pump and driver, mounted on a base, is
placed on the foundation, remove the coupling guard
and disconnect coupling halves.