Gardner Denver GD-2250T Service manual

ECN 1058968
GARDNER DENVER®
301THD996 Revision D
April 2011
GD-2250T
WELL SERVICING PUMP
OPERATING AND
SERVICE MANUAL

301THD996 Page i
GD-2250T
WELL SERVICING PUMP
MAINTAIN PUMP RELIABILITY AND PERFORMANCE WITH
GENUINE GARDNER DENVER
PARTS AND SUPPORT SERVICES
Gardner Denver® genuine pump parts are manufactured to design tolerances and are developed for
optimum dependability. Design and material innovations are the result of years of experience with
hundreds of different pump applications. Reliability in materials and quality assurance is incorporated in
our genuine replacement parts.
Your authorized Gardner Denver Sales Office offers all the backup you’ll need. The Fort Worth
Manufacturing Facility maintains a large inventory of genuine parts.
Gardner Denver supports your needs with these services:
1. Trained parts specialists to assist you in selecting the correct replacement parts.
2. Repair and maintenance kits designed with the necessary parts to simplify servicing your pump.
Authorized service technicians are factory trained and skilled in pump maintenance and repair. They
are ready to respond and assist you by providing fast, expert maintenance and repair services.
For the location of your local authorized Gardner Denver distributor, refer to the yellow
pages of your phone directory or contact:
Factory (Tulsa): Service Center (Odessa): Service Center (Ft. Worth):
Gardner Denver Well Servicing Pumps
4747 South 83rd East Avenue
Tulsa, Oklahoma 74145
Chaparral
2121 West 44th Street
Odessa, Tx 79768
Geoquip
7533 Kathy Lane
Ft. Worth, Texas 76126
Phone: [phone]
[phone] Phone: [phone] [phone] Phone: [phone] [phone]
Fax: [phone] Fax: [phone] Fax: [phone]
INSTRUCTIONS FOR ORDERING REPAIR PARTS
When ordering parts, specify Pump MODEL and SERIAL NUMBER (see nameplate on unit).
The Serial Number is also stamped on top of the cylinder end of the frame (cradle area).
All orders for Parts should be placed with the Tulsa or Ft. Worth facility.
Where NOT specified, quantity of parts required per pump or unit is one (1); where more than
one is required per unit, quantity is indicated in parenthesis. SPECIFY EXACTLY THE
NUMBER OF PARTS REQUIRED.

301THD996 Page ii
FOREWORD
Gardner Denver® pumps are the result of advanced engineering and skilled manufacturing. To
be assured of receiving maximum service from this pump the owner must exercise care in its
operation and maintenance. This book is written to give the operator and maintenance personnel
essential information for day-to-day operation, maintenance and adjustment. Careful adherence
to these instructions will result in economical operation and minimal downtime.
DANGER
Danger is used to indicate the presence of a hazard, which will cause severe
personal injury, death or substantial property damage if the warning is ignored.
WARNING
Warning is used to indicate the presence of a hazard, which can cause severe
personal injury, death or substantial property damage if the warning is ignored.
CAUTION
Caution is used to indicate the presence of a hazard, which will or can
cause minor personal injury or property damage if the warning is ignored.
NOTICE
Notice is used to notify people of installation, operation or maintenance
information which is important but not hazard related.

301THD996 Page iii
TABLE OF CONTENTS
Maintain Pump Reliability and Performance with Genuine Gardner Denver Parts and
Support Services...........................................................................................................i
Instructions for Ordering Repair Parts ...................................................................................i
Foreword...............................................................................................................................ii
Index.....................................................................................................................................iv
List of Illustrations.................................................................................................................v
Section 1, Danger Notices.....................................................................................................1
Section 2, Design, Description and Specifications.................................................................9
Section 3, Preparation, Operation and Maintenance..............................................................13
Section 4, Service Procedures..............................................................................................20
Section 5, Trouble-Shooting..................................................................................................27
Section 6, Rebuilding Data, Recommended Running Clearances .........................................33
Warranty.......................................................................................................................... ….35

301THD996 Page iv
INDEX
Charging Pump Requirement...................... 14
Covers and Guards, Danger Notice .............. 2
Crankshaft Assembly .............................11/25
Crosshead Assembly..............................10/23
Daily Routine Maintenance......................... 20
DANGER NOTICES, SECTION 1................. 1
DESIGN DESCRIPTION AND
SPECIFICATIONS, SECTION 2........... 9
Equipment Moving and Lifting ...................... 2
Flammable, Hot, cold or Corrosive Fluid
Pumping, Danger Notice....................... 5
Fluid Cylinder Installation............................ 21
Fluid End.................................................... 11
Fluid End Removal..................................... 20
Fluid End Service....................................... 20
Gear Train/Assembly..............................10/24
General Requirements and Safety Rules.... 20
General Specifications................................ 12
High Pressure Liquid Jetting, Blasting
and Cleaning, Danger Notice................ 6
Hydraulic Puller, Danger Notice.................... 2
Introduction................................................... 9
Lube Pump Suction Piping Sizing and........ 15
Lube System Pump.................................... 14
Monthly Routine Maintenance Schedule..... 17
Oil Stop Head Seal & Gear Covers............ 23
Performance Rating, GD-2250T ................. 12
Periodic Routing Maintenance Schedule..... 17
Plunger/Packing Lubrication....................... 16
Plunger Packing Lubrication
Recommendation Chart...................... 19
Plungers and Packing Replacement............21
Power End ..................................................10
Power End Internal Lube Sytem..................11
Power End Lubrication System....................14
Power End Service......................................23
Preparation after Shipping and Storage.......13
PREPARATION, OPERATION AND
MAINTENANCE, SECTION 3..............13
Pressurized Pump Systems, Danger Notice ..3
Pump Design ..............................................10
Pump Mounting Instructions........................13
Quarterly Routine Maintenance Schedule....17
Rebuilding Data...........................................33
REBUILDING DATA, RUNNING
CLEARANCES AND TORQUES,
SECTION 6.........................................33
Repair Parts, Ordering Instructions.................i
Running Clearances – Actual ......................33
SERVICE PROCEDURES, SECTION 4......20
Startup and New Pump Run-In Procedure...16
Torque Specifications..................................34
TROUBLE-SHOOTING, SECTION 5 ..........27
Valves and Seats Replacement...................22
Valve Seat Pulling, Danger Notice ................2
Warranty.....................................................35
Wedge Puller, Danger Notice........................2

301THD996 Page v
LIST OF ILLUSTRATIONS
Figure # Description Page
Figure 2-1 GD-2250T Pump.................................................................................... 9
Figure 2-2 GD-2250T Power End Section A-A........................................................ 10
Figure 2-3 Fluid End...............................................................................................11
Figure 3-1 Power End Mounting Hole Pattern......................................................... 13
Figure 3-2 Alternate Power End Mounting Hole Pattern..........................................14
Figure 3-3 Power End Lubricant Recommendations................................................14
Figure 4-1 Fluid End Stay Rods-Hex Nuts Tightening Sequence.............................21
Figure 4-2 Packing Assembly .................................................................................21
Figure 4-3 Valve Cage Spring Retainer ..................................................................22
Figure 4-4 Gunsight Spring Retainer....................................................................... 22
Figure 4-5 Conn Rod Crosshead Extension Rod Assembly.....................................24

301THD996 Page 1
SECTION 1
DANGER NOTICES
DANGER
Read and understand the following
DANGER NOTICES before moving or
operating the pump or any pump package
unit equipment.
Reciprocating pumps are machines capable
of producing high fluid pressures and flow
rates and are designed to be used with
proper care and caution by trained,
experienced operators. TO AVOID
PERSONAL INJURY, DEATH AND/OR
EQUIPMENT DAMAGE, READ AND
THOROUGHLY UNDERSTAND THE
FOLLOWING DANGER NOTICES PLUS
THE ENTIRE OPERATING AND SERVICE
MANUAL BEFORE ATTEMPTING TO
MOVE OR OPERATE THE PUMP. Contact
a Gardner Denver service representative if
you are unable to comply with any of the
danger notices or procedures described in
these documents.
Closely examine the pump performance
data upon pump delivery to become
thoroughly familiar with the operating limits
for this pump model. The pump must
never be operated at speeds, pressures
or horsepower exceeding the maximum
values or at speeds below the minimum.
Failure to observe the operating limits
could result in personal injury, death,
and/or equipment damage and will void
the warranty. Alterations to the pump, or
application of the pump outside the limits,
must not be made without Gardner Denver
written approval, together with a new set of
performance data, as dangerous operating
conditions could result.
Keep in mind that full operator attention and
alertness are required when operating high
pressure pumping equipment. Operators
should not begin or continue operations
when tired, distracted or under the influence
of alcohol or any type of prescription or
nonprescription drugs.
The timely replacement of expendable parts
and any other worn or damaged parts can
prevent equipment damage and possible
injury. The original parts used in Gardner
Denver pumps are designed and tested to
exacting standards to provide high quality
performance and durability. Your best
insurance in maintaining these
characteristics is to use genuine Gardner
Denver replacement parts.
A broad range of danger notices are
covered on these pages, however, they
cannot substitute for training, experience
and common sense in the safe operation of
high pressure pumping equipment.
HAMMER LUG FASTENERS
DANGER
On pumps equipped with hammer lug
unions and/or hammer lug valve covers the
following precautions must be observed to
avoid personal injury, death and/or
equipment damage due to contact with the
hammer, broken parts from the hammer,
lugs or other objects propelled by hammer
blows. When tightening or loosening
hammer lug unions and valve covers,
operators or maintenance personnel should:
•Inspect the hammer and hammer lugs
to insure they are all in good condition.
Replace any of these parts which are
cracked, damaged or badly worn.
•Wear safety shoes and safety glasses.
•Alert other personnel to move away
from the area.
•Check to insure they have safe footing.
•Fully engage the hammer bar, if one is
used, to prevent it from disengaging
violently from the cover as a blow is
struck.

301THD996 Page 2
•Wipe their hands and the hammer
handle and maintain a firm grip on the
handle to avoid losing control of the
hammer while swinging and striking.
•Carefully swing the hammer to avoid
striking themselves, another person and
objects other than the targeted lugs or
hammer bar.
•Avoid swinging the hammer above
shoulder height.
VALVE SEAT PULLING
DANGER
The following precautions must be observed
by operators and maintenance personnel to
avoid personal injury, death and/or
equipment damage from contact with the
puller, hammer, wedge or broken parts from
these components when using either a
hydraulic or wedge valve seat puller.
Operators or maintenance personnel
should:
Hydraulic Seat Puller
•Wear safety shoes and glasses.
•Chain or tie the jack down as it will jump
violently when the valve seat
disengages from the valve deck.
•Check to insure the pressure applied by
the hydraulic pump does not exceed the
hydraulic ram maximum pressure
rating.
Wedge Puller
•Grind off any mushroomed material
from the wedge before use.
•Inspect the hammer and wedge to
insure they are in good condition.
Replace any of those parts which are
cracked, damaged or badly worn.
•Wear safety shoes and goggles.
•Check to insure they have safe footing.
•Fully engage the wedge to prevent it
from disengaging violently from the
cover as a blow is struck.
•Wipe their hands and the hammer
handle and maintain a firm grip on the
handle to avoid losing control of the
hammer while swinging and striking.
•Carefully swing the hammer to avoid
striking themselves, another person and
objects other than the targeted wedge.
•Avoid swinging the hammer above
shoulder height.
DANGER
Personal injury, death and /or
equipment damage can result from
contact with moving parts. All moving
parts must be equipped with covers
and guards. All covers and guards
must be securely positioned at all
times when the unit is in operation.
COVER AND GUARDS
Covers and guards are intended to not only
protect against personal injury or death, but
to also protect the equipment from foreign
object damage
EQUIPMENT MOVING AND LIFTING
DANGER
Heavy equipment including pumps, pump
packages and components should only be
moved or lifted by trained, experienced
operators, who are physically and mentally
prepared to devote full attention and
alertness to the moving and lifting
operations. An operator should be fully
aware of the use, capability, and condition
of both the equipment being moved and the
equipment being used to move it.

301THD996 Page 3

301THD996 Page 4
DANGER
Failure to follow safe and proper
pump, pump package or component
lifting or moving procedures can lead
to personal injury, death and /or
equipment damage from shifting,
falling or other unexpected or
uncontrolled equipment movements.
Make sure the hoist, lift truck, ropes, slings,
spreader bar or other lifting equipment you
are using is in good condition and has a
rated lifting capacity equal to or greater than
the weight being lifted. Lifting devices must
be checked frequently for condition and
continued conformance to rated load
capacity. They should then be tagged with
the rated capacity together with the date of
inspection.
Fully assembled pumps and pump
packages are heavy and should only be
moved using the specified lifting lugs or
attachments.
Many individual components have lifting
eyes or lugs which must not be used to
lift assemblies, as they are designed to
bear the weight of the component only.
Before lifting the individual component
check to insure the lifting attachment is
firmly secured to the component with
undamaged, properly torqued fasteners,
sound welds, or other secure attachments.
Examine the lifting eyes, lugs, slots, holes
or other projections to insure they are not
cracked, otherwise damaged or badly worn.
The repair of existing or addition of new
welded lifting eyes, lugs or other projections
should only be performed by experienced,
qualified welders.
Package units should be lifted with
spreaders connected to the lifting
attachments normally built into the package
unit support skid. Packages too large to lift
as fully assembled should be separated into
smaller loads.
For these smaller loads the lifting devices
should be fastened to the lifting attachments
normally built into the individual motor,
engine, pump or transmission / torque
converter, or their separate support skids.
When lifting subassembled components, for
example a suction stabilizer attached to
suction piping or a discharge pulsation
damper attached to a strainer cross and
piping, use special lifting slings designed to
safely support the combined weight of the
components.
If a crane or hoist is being used to lift large
components or assemblies, one or more
persons should assist the operator from the
ground with guide lines attached to the
equipment being moved to properly position
it and prevent uncontrolled movement.
When you start to lift a pump, package unit,
subassemblies or individual components
and you observe the equipment is tilting, or
appears unbalanced, lower the equipment
and adjust the lifting device to eliminate
these improper lifting conditions before
proceeding to move the equipment.
It is poor practice and dangerous to allow
the equipment to pass over or close to your
body or limbs. Be prepared to move quickly
out of danger if equipment starts to fall, slip
or move unexpectedly toward you.
PRESSURIZED PUMP SYSTEMS
DANGER
Fluids under high pressure can
possess sufficient energy to cause
personal injury, death and/or
equipment damage either through
direct contact with escaping fluid
streams or by contact with loose
objects the pressurized fluid propels.
Operating a pump against a blocked or
restricted discharge line can produce
excessive pressures in the entire discharge

301THD996 Page 5
system, which can damage or burst
discharge system components.
DANGER
Never operate a pump without a
properly sized pressure relief valve or
working overpressure shutdown in
the discharge line immediately
adjacent to the pump discharge.
The relief valve should be placed in the
flowing discharge line and not at the
opposite end of the discharge manifold in a
dead end connection. The dead end may
become clogged with solid material carried
in the fluid, which could prevent proper
relief valve operation.
DANGER
Never place a shut-off valve or any
other component between the pump
discharge connection and the
pressure relief valve.
Make sure the pressure relief valve is
installed so any pressurized relief discharge
from the valve is directed away from
possible contact with people or equipment.
The relief valve must be set to relieve at a
pressure equal to or below the maximum
pressure values shown on the pump data
plate. However, if a component is used in
the discharge system with a lower rated
pressure capability than that listed on the
pump data plate, the pressure relief valve
must be set to relieve at a pressure equal to
or below the rated capability of the lowest
rated component.
Before starting the pump every time,
check to insure:
•The pressure relief valve is in good
operating condition and has been set to
the proper relief pressure.
•Any pipe line used to direct pressurized
relief flow to another location, such as a
collecting tank, is not blocked.
•The discharge system is not blocked
and all the discharge line valves are
open.
Check all fluid end discharge system
components including pipes, elbows
connections, threads, fasteners, hoses,
etc., at least once every six months to
confirm their structural adequacy. With
time, wear, corrosion and fatigue can
reduce the strength of all components.
Magnetic iron and steel components should
be checked with magnetic particle or dye
penetrant crack detection equipment.
Nonmagnetic materials should be checked
for cracks with dye penetrants. All metallic
components should also be visually
checked during these inspections for signs
of corrosion. If a component shows
evidence of cracking or loss of material due
to corrosion it must be replaced with a new
part.
Continually monitor suction and discharge
hose assemblies when the pump is
operating for leakage, kinking, abrasion,
corrosion or any other signs of wear or
damage.
Worn or damaged hose assemblies
should be replaced immediately. At least
every six months examine hose assemblies
internally for cut or bulged tube,
obstructions and cleanliness. For segment
style fittings, be sure that the hose butts up
against the nipple shoulder, the band and
retaining ring are properly set and tight and
the segments are properly spaced. Check
for proper gap between nut and socket or
hex and socket. Nuts should swivel freely.
Check the layline of the hose to be sure that
the assembly is not twisted. Cap the ends of
the hose with plastic covers to keep them
clean until they are tested or reinstalled on
the pump unit. Following this visual
examination, the hose assembly should be
hydrostatically tested, on test stands having
adequate guards to protect the operator, per
the hose manufacturer's proof test
procedure.

301THD996 Page 6
Fluid end component inspections should
be performed more frequently than every
six months if pressures above 2500 psi
are used in the discharge system or if
corrosive, abrasive, flammable or hot
(over 110º F) fluids are being pumped.
Proper stuffing box packing selection is
important for safe pump operation. Contact
a Gardner Denver service representative for
assistance in selecting the proper packing
before beginning operation.
Before starting the pump the first time and
periodically thereafter check the pump,
suction and discharge system fastener
torques versus the values listed on page 12
to insure proper tightness. Over and under
torquing can damage threaded pipes,
connections and fasteners, which may lead
to component damage and/or failure.
Replace all components found to be
damaged or defective. On pumps equipped
with stuffing boxes, the gland must be
engaged by at least three (3) threads to hold
the discharge pressure of the pump.
DANGER
Do not attempt to service, repair or
adjust the plunger packing or other-
wise work on the pump while the unit
is operating. Shut off the pump drive
engine and relieve the fluid pressure
in the suction and discharge systems
before any work or investigation is
performed on the pump or pump
systems.
Block the crankshaft from turning and make
certain that all pump drive motor or engine
start switches or starter controls are clearly
tagged with warnings not to start the pump
while repair work is in process.
Whenever the pump is operating,
continually monitor the entire suction,
discharge and pump lubricating systems for
leaks. Thoroughly investigate the cause for
leakage and do not operate the pump until
the cause of the leak has been corrected.
Replace any parts which are found to be
damaged or defective. When a gasketed
joint is disassembled for any reason, discard
the used gasket and replace it with a new,
genuine Gardner Denver gasket before
reassembling the joint.
Due to the high working pressures contained
by the fluid end, discharge manifold and
discharge piping, welding on these
components is not recommended. If
welding on the discharge system cannot be
avoided, only experienced, qualified welders
should be used. In addition, the welded part
should be hydrostatically proof tested in the
shop with water or hydraulic fluid to one and
one half times maximum discharge system
working pressure, with no observable fluid
leakage, before the part is reinstalled in the
pump system.
In summary, high pressure fluid streams can
possess sufficient energy to cause personal
injury, death and/or equipment damage.
These results can occur either through
direct contact with the fluid stream or by
contact with loose objects the fluid stream
has propelled, if the pump system is
improperly used, or if the fluid is
misdirected, or allowed to escape from
defective or improperly maintained
equipment.
FLAMMABLE, HOT, COLD OR
CORROSIVE FLUID PUMPING
NOTICE
Fluid ends manufactured and CE
marked in accordance with Pressure
Equipment Directive 97/23EC are
limited to the fluids and pressures
indicated on the name plates.
Corrosive and flammable fluids shall
not be pumped with CE marked fluid
ends tagged for group 2 fluids as
defined by Article 9 section 2.2 of the

301THD996 Page 7
Pressure Equipment Directive
97/23/EC.

301THD996 Page 8
DANGER
Extreme caution must be exercised
by trained and experienced operators
when flammable, hot, cold or
corrosive fluids are being pumped to
avoid personal injury, death an/or
equipment damage due to explosion,
fire, extreme cold or chemical attack.
Never operate a pump which is pumping
hydrocarbons or other flammable, hot, cold,
or corrosive fluids when any part of the
pump, suction system or discharge system
is leaking. Stop the pump immediately if
any leakage, other than a few drops per
minute of packing weepage, is observed.
Keep all flame, sparks, or hot objects away
from any part of the pump, suction system,
or discharge system. Shield the pump,
suction system and discharge system to
prevent any flammable, hot, cold or
corrosive fluid leakage from dripping or
spraying on any components, flame, sparks,
hot objects or people. Inspect the plungers,
packing, gaskets and seals for fluid leakage
frequently and replace all worn or leaking
parts.
Selection of the proper gaskets, seals and
stuffing box packing is even more critical
when flammable, hot, cold or corrosive
fluids are being pumped than when other,
inherently less dangerous fluids are used.
Contact a Gardner Denver service
representative for assistance in selecting
the proper gaskets, seals and packing
before beginning operation.
Since some packing weepage into the
cradle area is inevitable, a drain located
below the bottom of the cradle must be
connected to a drain line which conducts the
fluid leakage to a collection container
located in a protected area. The entire
drain system and container must be
constructed of materials resistant to attack
from the pumped fluid or from explosion or
fire of the pumped fluid. Heavy duty
cradle covers must be securely fastened
in the proper position on the pump at all
times when the pump is operating. If the
pumped fluid releases harmful, explosive
or flammable vapors the covers must be
vented to conduct the fumes away from
the pump unit to a non-hazardous area.
Before beginning pumping operations or
starting the pump power source (whether an
engine or electric motor) check the
atmosphere all around the pumping site for
the presence of flammable or explosive
vapors. Do not begin operation and stop
ongoing operation if flammable or explosive
vapors are detected. Hot surfaces, sparks,
electric current or engine exhaust could
ignite flammable or explosive vapors. Each
engine used as a power source on pumping
units where flammable or explosive vapors
could form should be equipped with an air
inlet shut-off. If flammable or explosive
vapors are present in the pumping site
atmosphere, an engine could continue to
run on these vapors even after the engine
fuel line is shut-off if an air inlet shut-off is
not used.
In addition, on pumping units used where
flammable or explosive vapors could form,
all electric motors used as power sources
must be of explosion proof construction and
all electrical components and wiring must
meet the current National Electrical Code
for explosive atmospheres.
These precautions must be taken to avoid
possible personal injury, death and/or
equipment damage from explosion, fire or
burns.

301THD996 Page 9
HIGH PRESSURE LIQUID JETTING,
BLASTING AND CLEANING
DANGER
Extreme caution must be exercised if
any type of wand, gun, nozzle or any
other pressure and flow directing
device is attached to the pump
discharge system for use in jetting,
blasting, cleaning, etc. This type of
equipment must be used by trained,
experienced operators with the
utmost care. High pressure fluid
streams can either by direct contact
or by propelling loose objects, cause
serious personal injury or death to
operators and/or other persons.
Pressure or flow directing devices often
receive pressurized flow through flexible
hoses, which can burst if they are kinked,
cut, abraded or are otherwise worn,
damaged or pressured above their rated
capacity. Protect the hose and connections
from damage by people, objects and
vehicles. A broken, cut or otherwise burst
hose can release pressurized fluid which
may cause personal injury, death and/or
equipment damage.
High pressure fluid from hand held or hand
directed pressure and flow directing devices
may overpower an operator’s ability to
control or direct the device, which could
lead to personal injury, death and/or
equipment damage. The operator must
brace against the backward thrust of a hand
held device. In addition, a safety harness or
safety net must be used when working in an
area where the operator could be injured in
a fall. Stand to the side of any tubing or
container being sprayed to avoid back spray
and never operate a hand held device
above shoulder level.
Never direct the pressurized fluid stream at
yourself or any other person, control valves,
the pump, pump drive, suction or discharge
systems. The pressurized stream can
cause serious personal injury or death and
can also change valve or control settings
which could dangerously increase the
delivery pressure to the pressure and flow
directing device.
When operating a pressure and flow
directing device, use only equipment which
automatically shuts off flow when an
operator releases hand or foot pressure on
the pressurized flow trigger control to
prevent injury if the operator is overpowered
or becomes disabled.
Check to insure this automatic shut-off
equipment is operating properly before
every use and never circumvent the
automatic shut-off for any reason or by any
means when operating the equipment.
When operating any type of high pressure
liquid jetting, blasting or cleaning devices,
the operators must always wear protective
clothing including, but not limited to, a hard
hat with full face visor, heavy duty rain coat
and pants, boots with nonskid sole and
safety toe, rubber gloves with rough grip
surface and ear noise protection.
Full operator attention and alertness are
required when operating this equipment to
avoid personal injury, death and/or
equipment damage. The operators should
take frequent rest breaks and cease
operations when they become tired or
distracted.
Before the equipment is started, the work
area must be inspected and properly
prepared to avoid personal injury, death,
and/or damage to equipment. Make sure
the work area is checked for hazardous
fumes, has adequate ventilation for engine
exhaust and sufficient drainage for released
fluid. Check the work area for electrical
equipment, connections, outlets, fixtures, or
lines. If any are present they must be made
water tight and the electrical power to these
devices must be shut off to avoid electrical
shocks from fluid contact. The work area
should be clearly marked and roped off to
keep unauthorized people and vehicles from
entering. Remove all loose parts, tools and

301THD996 Page 10
equipment from the work area before
beginning operation.
All pressure containing devices including
wands, nozzles, guns, hoses, connections,
etc., should be regularly checked for
condition. These components should all be
tagged with their tested pressure capabilities
together with the date testing was
performed. Always be aware of the
pressure level in the system and never
connect any equipment to the system
which has a rated or tested pressure
capability below the system operating
pressure. The equipment must be shut
down and the system pressure released
before changing or disconnecting wands,
nozzles, guns, hoses, connections or any
other pressurized system components.
All pressure containing devices including
wands, nozzles, guns, connections, etc.,
plus all automatic shut-off, pressure and
control equipment should be treated with
care. Protect them from damage by people,
objects and vehicles. Never lay them in
dirt, mud, ice or other loose material which
could plug the fluid opening or interfere with
their operation. Never use the wand,
nozzle, gun, etc. to pry loose material off
items being cleaned.
Before starting operation in a cold
environment, check to make sure there is
no ice in the fluid system and repeat this
inspection each time before operation is
restarted.
Before purchasing wands, nozzles, guns,
connections, hoses, etc., manufacturers of
these components should be contacted for
detailed information on the design and
safety features incorporated in their
products. After careful study of various
manufacturers products, we recommend
that only those wands, nozzles, guns,
connections and hose, etc., be considered
for purchase that you judge to offer the
highest quality of design, construction and
safety, since these components are among
the most critical to the safe operation of
high pressure liquid jetting, blasting and
cleaning equipment.
After you have selected and purchased
these components, follow the
manufacturer’s instructions completely in
their use.
In summary, high pressure jetting,
blasting and cleaning are inherently
dangerous, as the pressures and flow
rates needed to remove scale, clean, etc.
are sufficient to cause personal injury,
death, and/or equipment damage
resulting from, but not limited to, any of
the conditions described in the above
Danger Notices.

301THD996 Page 11
SECTION 2
DESIGN, DESCRIPTION AND SPECIFICATIONS
INTRODUCTION
The Gardner Denver GD-2250T is a multi-
purpose pump for various applications such
as oil well servicing, water blasting,
industrial use, etc. The pump was designed
using modern analytical engineering
methods and techniques for stress analysis
of structural components, gears, and journal
bearings. The gear drive was calculated in
accordance with the most recent standards,
procedures and computer software
developed by American Gear Manufactures
Association.
The Issue of personnel safety is the most
important topic covered in this manual.
Therefore, in the beginning of this manual
the user is introduced to dangers inherent in
the operation of a high pressure pump. To
avoid accidents and injuries, all safety rules
listed in this section and also all other
applicable safety rules and regulations must
be carefully observed.
The sections on Pump Design, Description,
and Specifications, describe the pump
design, list the pump specifications, and
present drawings depicting the pump
external views and all essential cross-
sectional drawings.
Note: The above figure shows a GD-2250T pump assembly with a 5.5” Fluid End
FIGURE 2-1: GD-2250T PUMP

301THD996 Page 10
PUMP DESIGN
The GD-2250T is a horizontal single acting
2250 horsepower triplex pump. It has an 8”
stroke and various plunger sizes from 3.75”
diameter through 7.5” diameter. The weight
of this pump will vary slightly due to the
various accessories, but will not exceed
12,650 pounds. Materials used in the power
end have been selected to provide long life,
and meet the rigorous demands required for
well servicing applications. All sizes of
plunger fluid ends are interchangeable on
the power end.
POWER END
The power end is available in 6.353:1 gear
ratio only. This is a “dry sump” pump
designed for pressure lubrication fed
through various hoses and drilled
passageways to the main bearings, rod
bearings, knuckle joints, etc. Because of
the various drive arrangements for powering
these pumps, the lubrication pump itself is
not built-in. It must be sized and mounted
to suit each particular application.
NOTICE
The direction of rotation must be
such that the top side of the
crankshaft is moving towards the
fluid end.
FIGURE 2-2: GD-2250T POWER END CROSS SECTION
CROSSHEAD ASSEMBLY
The crosshead assembly features a one
piece, high strength connecting rod. This
connecting rod is a much more durable
design than the old multiple piece
connecting rods commonly used by other
companies. This one piece design was first
developed by Gardner Denver. The
crossheads and crosshead-guides are full-
cylindrical design for minimum PV loading
and maximum lubrication. The connecting
rods are automotive type. The spherical
thrust surface of the connecting rods allows
for maximum bearing area with minimal
bore spacing, allowing the pump to achieve
higher rod loads with a light weight design.
GEAR TRAIN
The gear train features precision ground,
heat treated and helical cut gears on each
end of the crankshaft. They are driven by
gears integrally machined into the alloy
steel pinion shaft. These gears are
precision timed to each other which
eliminates time consuming, inexact, manual
timing of these gears.

301THD996 Page 11
CRANKSHAFT
The crankshaft is made of high strength
alloy steel that has been precision machined
and heat treated for fatigue resistance and
long wear. It has been drilled with
lubrication passageways to provide oil for all
the connecting rod journal bearings as well
as the crosshead assembly.
POWER END INTERNAL LUBE SYSTEM
The lube manifold attached to the pump has
two inlets on either side of the pump.
Discharge from the lube pump can be
connected to either one of these inlets or
both at the same time. After entering the
inlet, the lube oil flow is divided into two
lines:
1. Through external hoses and rotating
unions the lubrication oil enters the
crankshaft where it is distributed to the
connecting rod thrust bearings.
2. Through the lubrication manifold, oil is
distributed to the main bearings and
the outside of the crosshead.
There is a 4” drain hole on the bottom of the
power frame. User plumbing will direct
drain oil flow back into the lube reservoir.
Packing components are lubed separately.
The drain from the packing is held in the
drip pan.
FLUID END
The conventional valve over valve
configuration offers field proven valve and
spring performance. Improvements in the
fluid end life come from:
1. New sophisticated methods of
metallurgical control which enable us to
obtain steel with very consistent
chemical components and mechanical
properties. This results in extended
cylinder life.
2. Internal edges and corners are hand
radiused, blended and polished for
improved resistance to fatigue
cracking.
3. Extreme pressure autofrettage for long
cylinder life and resistance to cracking
at the bore intersection areas.
FIGURE 2-3: FLUID END

301THD996 Page 12
GENERAL SPECIFICATIONS
This section presents the pump basic specifications (U.S. Systems). The first set of
specifications deals with the pump's power, rod load, plunger stroke, and overall dimensions.
The other table presents allowable pressures and flows for various plunger sizes and pump
RPM’s along with data on power requirements.
GD-2250T PUMP SPECIFICATIONS (U.S. SYSTEMS)
Rated Brake Horsepower (hp)
2250
Stroke Length (in)
8.0
Maximum Rod Load (lbs)
237,500
Gear Ratio
6.353:1
Weight (system dry) (lbs)
12,650
GD-2250T PERFORMANCE RATING – U.S
100 RPM 150 RPM 200 RPM 330 RPM
Plunger
Size
(Inches)
GPR GPM PSI GPM PSI GPM PSI GPM PSI
7.5 4.59 459 5379 688 5044 918 3783 1514 2293
7.0 4.00 400 6174 599 5790 799 4343 1319 2632
6.75 3.72 372 6640 557 6227 743 4670 1226 2830
6.50 3.45 345 7161 517 6715 689 5036 1137 3052
6.00 2.94 294 8404 440 7881 587 5911 969 3582
5.75 2.70 270 9151 404 8581 539 6436 890 3900
5.50 2.47 247 10002 370 9379 493 7034 814 4263
5.0 2.04 204 12102 306 11348 408 8511 673 5158
4.50 1.65 165 14941 248 14010 330 10508 545 6368
4.00 1.31 130 18909 196 17732 261 13299 431 8060
3.75 1.15 115 21515 172 20175 229 15131 378 9170
Brake Horsepower* 1600 2250 2250 2250
* Based on 90% Mechanical Efficiency and 100% Volumetric Efficiency.