Kärcher HAWK LEUCO TXT Series User manual

POSITIVE DISPLACEMENT HIGH PRESSURE PISTON PUMPS TXT
SERIES
INSTRUCTION MANUAL
Version 00021
ORIGINAL
INSTRUCTIONS
LEUCO S.p.A.
Via Colletta, 20
42124 Reggio Emilia (RE) - ITALY
Tel. [phone] Fax [phone]
This manual and associated information can be downloaded from the website:
www.hawkspumps.com
This manual is an integral part of the product and should always be made available to any persons using it

This Manual remains the property of the Manufacturer; it may not be reproduced or copied, even partially.
Instructions Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 1
Page 2 of 35
CONTENTS
1 GENERAL INFORMATION ........................................................................................................................................... 4
1.1 Structure of the Manual 4
1.1.1 Scope and content......................................................................................................................4
1.1.2 Recipients/definitions.................................................................................................................4
1.1.3 Storage........................................................................................................................................5
1.1.4 Symbols used in the manual.......................................................................................................5
1.2 Manufacturer......................................................................................................................................5
1.3 Service Centres ...................................................................................................................................5
1.4 CE Mark and Certification - Declaration of Incorporation 6
1.5 Guarantee...........................................................................................................................................6
2 GENERAL DESCRIPTION.............................................................................................................................................. 7
2.1 Main parts...........................................................................................................................................8
2.1.1 Technical characteristics.............................................................................................................9
2.2 Ambient conditions ............................................................................................................................9
2.3 Vibrations............................................................................................................................................9
2.4 Noise................................................................................................................................................ 10
2.5 High temperatures........................................................................................................................... 10
2.6 Stability............................................................................................................................................ 10
2.7 Pressurised liquids........................................................................................................................... 10
3 SAFETY......................................................................................................................................................................10
3.1 General safety instructions.............................................................................................................. 10
3.2 Residual risks ................................................................................................................................... 11
3.3 Personal protective equipment 12
3.4 Working safely 12
3.4.1 Safety when using the pump 12
3.4.2 Safety when using high pressure circuits 12
3.5 Safety during lifting and handling 13
3.5.1 Packing, unpacking and transport 13
3.6 Safety during maintenance 14
3.7 Products used 14
3.8 Product labels 14
3.9 First Aid 15
3.9.1 First Aider duties 15
3.9.2 Emergency call......................................................................................................................... 15
3.9.3 Injuries..................................................................................................................................... 15
3.9.4 Bleeding................................................................................................................................... 16
4 INTENDED USE .........................................................................................................................................................16
4.1 Intended use.................................................................................................................................... 16
4.2 Improper Uses 16
5 INSTALLATION AND ASSEMBLY 17
5.1 Responsibilities of the Customer/User 18
5.1.1 Placing...................................................................................................................................... 18
5.1.2 Rotation direction.................................................................................................................... 19
5.1.3 Plumbing connections ............................................................................................................. 19
5.1.4 Suction line .............................................................................................................................. 19
5.1.5 Filter......................................................................................................................................... 19
5.1.6 Discharge line .......................................................................................................................... 20
5.2 Pre-commissioning instructions 20
5.3 Long periods of inactivity 20
5.4 Operation......................................................................................................................................... 21

This Manual remains the property of the Manufacturer; it may not be reproduced or copied, even partially.
Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 0
Page 3 of 35
6 MAINTENANCE.........................................................................................................................................................26
6.1 General maintenance ...................................................................................................................... 26
6.2 Removal of mechanical parts 27
6.3 Assembly of mechanical parts 28
6.4 Inspecting the bearings ................................................................................................................... 28
6.5 Changing the bearing....................................................................................................................... 29
6.6 Maintenance of the hydraulic part 29
6.6.1 Replacement of suction/delivery valves 29
6.6.2 Replacement of the seals ........................................................................................................ 30
6.6.3 Replacing the plungers ............................................................................................................ 33
7 TROUBLESHOOTING.................................................................................................................................................33
7.1 Problems and potential remedies 33
8 DISMANTLING AND DISPOSAL ................................................................................................................................. 34
9 SPARE PARTS............................................................................................................................................................34
10 ATTACHMENTS 34

This Manual remains the property of the Manufacturer; it may not be reproduced or copied, even partially.
Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 0
Page 4 of 35
1GENERAL INFORMATION
1.1 Structure of the Manual
This manual is an integral part of the official documents provided with the pump. It is written by the Manufacturer and provides
the operating instructions and criteria to be followed for the installation, use and maintenance of the pump.
Before choosing and/or using any LEUCO product, it is important that the customer controls all aspects related to its specific
application with due care and studies the information provided in the technical sales literature published by LEUCO. As LEUCO
products may be used in different operating conditions and/or applications, the customer is responsible for carrying out any tests
and analysis that will help him choose the best product for his needs. He is also responsible for complying with all operating
specifications and safety requisites.
LEUCO’s products and publications are subject to change at any time without notice.
The customer must ensure the installation is carried out in full compliance with the instructions provided in this manual, as well as
with current national legislation and standards.
The Manufacturer is not liable for any damages caused by incorrect use, negligence, superficial interpretation or total lack of
application of the safety related information provided in this manual.
1.1.1 Scope and contents
These operating instructions provide all the information concerning the installation, use, maintenance, storage and all stages of the
life cycle of the high-pressure positive displacement piston pumps to be observed by any persons involved in its assembly/end user
in order to prevent possible risks.
Operators and qualified technicians must read the instructions in this publication with due care before starting any operation on
the equipment.
Contact LEUCO S.p.A for the necessary explanations if you have any doubts regarding the correct meaning of the instructions.
1.1.2 Recipients / Definitions
These instructions are intended for skilled personnel who have been given appropriate training for carrying out installation and
routine maintenance.
Customer
The person, public agency or private company who bought the pump and intends to use for its intended purposes. This may also be
the person responsible for its assembly provided he has the necessary requisites.
User/Operator
An authorised person with the requisites, skills and information needed to use the pump, machine or system where the pump is
fitted, and to carry out routine maintenance.
Ordinary/general maintenance
The actions required to maintain the machine in good working order, to guarantee a longer working life and to safeguard safety
requisites at all times. The Manufacturer has provided a description of the maintenance schedule and methods in this manual.
Maintenance may be carried out by qualified personnel, including the operator, as described above.
Supplementary maintenance
The actions required to restore the working order and efficiency of the machine. Such actions are required in case of sudden
anomaly and may only be carried out by a specialised technician.
Installer/Assembler
An authorised technician with the specific requisites and skills needed to carry out the actions needed to install the pump and/or
similar machines and to carry out routine maintenance in complete safety, independently and without incurring risks.

This Manual remains the property of the Manufacturer; it may not be reproduced or copied, even partially.
Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 0
Page 5 of 35
Training
The period when the operators are given the necessary instructions to carry out any actions in a correct and risk free manner.
Person at risk
Any person finding themselves totally or partly in a danger zone.
1.1.3 Storage
This instructions manual should be kept in the direct vicinity of the machine, in a specific container, protected from contact with
liquids and any other substance that could render it illegible.
1.1.4 Symbols used in the manual
SYMBOL
MEANING
COMMENT
DANGER
Indicates a potentially serious risk for the
user/assembler.
CRUSHING HAZARD FOR UPPER AND
LOWER LIMBS
Indicates the danger of crushing the
upper limbs when positioning or handling
the pump.
MOVING MECHANICAL PARTS
HAZARD
Indicates a hazard due to the presence
of moving parts (such as drive shafts or
reduction units).
SYMBOL
MEANING
COMMENT
WARNING
SAFETY INFORMATION
A warning or note regarding key features
or useful information. Pay maximum
attention to the text boxes indicated by
these symbols.
REFERENCE
Refer to the instructions manual before
attempting any
action.
ADJUSTMENTS/MAINTENANCE
Specific mechanical adjustment and/or
electrical calibration (when applicable)
may be necessary
for special operating modes and/or in the
event of anomalies.
1.2 Manufacturer
LEUCO S.p.A.
Via Colletta, 20 - 42124 Reggio Emilia (RE) - ITALY
1.3 Service Centres
Contact LEUCO S.p.A. or specialised personnel authorised by the Manufacturer for further information relating to operation or
maintenance.
Make a note of the information you will find on the pump’s specifications plate and the type of fault found whenever requesting
technical assistance.

This Manual remains the property of the Manufacturer; it may not be reproduced or copied, even partially.
Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 0
Page 6 of 35
1.4 CE Mark and Certification - Declaration of Incorporation
The Hawk high pressure piston pumps described in this manual are manufactured in compliance with Directive 2006/42/CE and
European Community Directives that are pertinent and applicable at the time they are sold. As they are "partly completed
machinery" according to Article 2, letter g) of the above Directive, a Declaration of Incorporation is issued in place of a
certification. As its contents make clear, the final Installer is responsible for issuing the declaration of conformity and relative CE
mark (which may be the same person as the Customer).
These assembly instructions were drafted in accordance with Annex VI of the above Directive.
This instructions manual complies with Annex I section 1.7.4 of the above Directive as well as UNI 10893 standard and ISO/IEC 37
guidelines.
1.5 Guarantee
LEUCO S.p.A. guarantees HAWK products from defects in their construction and materials for a period of (1) year from the time
they left the factory.
This guarantee is limited to the repair and replacement of parts or products that LEUCO S.p.A. deems were defective at the time of
delivery. All the products covered by this limited guarantee must be returned freight paid for inspection, repair or replacement by
the manufacturer.
This limited warranty is the only form of valid guarantee and replaces any other form of explicit or implicit warranty, including any
guarantee of fitness for sale or any particular purpose. The manufacturer refuses any such liability with this statement.
Faulty products will only be repaired or replaced according to these terms. LEUCO S.p.A. is not liable for any further loss, damage or
expense, including accidental or indirect damages caused directly or indirectly from the sale or use of these products.
Any unauthorised use of spare parts that were not manufactured by LEUCO S.p.A. automatically invalidates this guarantee, which is
subject to compliance with the instructions for installation and operation provided. There are no additional guarantees other than
the guarantee described above.
All pumps supplied by LEUCO are carefully controlled during their production and undergo cycles of testing before shipment. For
optimum pump performance, to prevent incidents and avoid invalidating the guarantee, it is essential to comply with the
procedures described in this manual regarding the correct assembly and initial start-up of the pump.
LEUCO S.p.A. is not liable for any errors made when drafting this manual.
The Manufacturer is not liable in case of any unauthorised modification to the product or to any part of it
and any such action will invalidate the guarantee.
The list of Directives and the standards applied can be found in the Declaration of Incorporation in the attachments
(Attachment I) of this Manual.

This Manual remains the property of the Manufacturer; it may not be reproduced or copied, even partially.
Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 0
Page 7 of 35
2GENERAL DESCRIPTION
TXT pumps are designed to operate with clean water, at a maximum temperature of 65°C.
The duration of the seals will depend on the temperature of the water: the warmer the water, the more likely that deleterious
cavitation phenomena - known to reduce the useful life of seal components - will occur.
The pump performance (flow rate, pressure, rpm) indicated in this manual and in the catalogue refers to the pump’s maximum
specifications and should not be exceeded for any reason.
The TXT pumps have two due suction inlets and two delivery outlets (refer to the section 2.1.1 “Technical characteristics” table for
the dimensions of your model). The system may be connected to one or both delivery outlets and suction inlets without affecting
the pump's operation.
Unused ports must, however, be hermetically sealed.
The main parameters that determine your choice of Hawk pump are volume, pressure, rotation speed and power consumption.
The volume is given in litres per minute and is directly proportional to the rotation speed.
The speed of rotation is given as revolutions per minute.
The pressure is given in bars and is the maximum pressure that the pump can reach.
The power consumption is shown in kW and is the absorption required to achieve the maximum flow rate and pressure
indicated.
When coupled with an electric motor, the power of the motor should be greater than that shown in the catalogue. When coupled
with a combustion engine, the power of the engine should be at least 30% more than that shown in the catalogue.
The power consumed by the pump in KW is the product of:
Power = Volume Rate (l/min) x Pressure (bar) / 520
Hawk pumps were not designed for pumping potentially hazardous liquids (explosive, toxic and flammable
liquids). Contact the Manufacturer in case of doubt.
Before choosing and/or using any LEUCO product, it is important that the customer controls all aspects
related to the specific application with due care and studies the information provided in the technical and
sales literature published by LEUCO S.p.A.
LEUCO’s products and this document are subject to change at any time without notice.
The list of pump models to which this manual refers is attached to the Declaration of Incorporation accompanying
the pump (ANNEX I).

This Manual remains the property of the Manufacturer; it may not be reproduced or copied, even partially.
Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 0
Page 8 of 35
2.1 Main parts
A. MANIFOLD HOUSING
B. PUMP BODY
C. OIL DIP STICK
D. CRANKSHAFT
E. CONNECTING ROD
F. PLUNGER (relative parts)
G. OIL LEVEL INDICATOR
H. DELIVERY LINE VALVE
I. SUCTION LINE VALVE
More details on the parts can be found in the exploded views attached to this manual (ATTACHMENT II).
C
D
A
B
E
F
G
H
I

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Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 1
Page 9 of 35
The pumping action is created by a series of plungers, connected to the drive shaft by connecting rods. During motion, the plungers
slide on their axis inside the manifold housing where the suction and delivery lines are fitted with valves that allow the liquid to
flow in a single direction.
2.1.1 Technical characteristics
The main dimensions and specifications are as follows:
Caratteristiche Tecniche
Technical
Characteristics
Pump
Pompa
Pumpen
Pompa
Pressure
Pression
Druck
Pressione
Volume
Debit
Wassermenge
Capacity
RPM
Tours/min
u.p.m.
giri/min
Required
Puissance
Leistung
Potenza
Inlet port
Entrée
Eingang
Aspirazione
Outlet
Sortie
Ausgang
Mandata
Weight
Poids
Gewicht
Weight
Bar
PSI
l/min
GPM
kW
HP
kg
50 Hz
50 Hz
50 Hz
50 Hz
50 Hz
TXT1225R
250
3625
120
31.70
1000
57.70
77.38
G 2”
G 1”
74.5
TXT1225L
250
3625
120
31.70
1000
57.70
77.38
G 2”
G 1”
74.5
TXT1520R
200
2900
150
39.63
1000
57.70
77.38
G 2”
G 1”
74.5
TXT1520L
200
2900
150
39.63
1000
57.70
77.38
G 2”
G 1”
74.5
TXT1817R
170
2465
180
47.55
1000
58.80
78.85
G 2”
G 1”1/4
74.5
TXT1817L
170
2465
180
47.55
1000
58.80
78.85
G 2”
G 1”1/4
74.5
TXT2214R
140
2175
220
58.12
1000
59.20
79.39
G 2”
G 1”1/4
74.5
TXT2214L
140
2175
220
58.12
1000
59.20
79.39
G 2”
G 1”1/4
74.5
Detailed technical specifications for each range or series, with the associated product versions, are provided in ATTACHMENT II at the
end of this document.
2.2 Ambient conditions
The local operating conditions are specified on the product’s specifications plate (see the facsimile in section 3.8). Some of the
operating conditions are listed below.
Parameter
Tolerated values
Room temperature
from -10°C a
+50°C
Storage temperature
from 0°C a +50°C
Humidity
from 20% to 80%
2.3 Vibrations
Hawk pumps will not produce hazardous vibrations in conditions of normal use and provided the installation and assembly
instructions in this document were carried out properly. In addition,
there will be no contact with the operator during operation, as the pump is part of the machine/system it is fitted on.
2.4 Noise
The equipment was designed and built to reduce the generation of noise at source as far as its application and method of use
allows this.
The noise measured is below the minimum level envisaged in current legal standards.
The Hawk pumps described in this manual were NOT designed or built for operating in potentially
explosive environments.
Contact the Manufacturer or refer to the product catalogue for details of suitable pumps.

This Manual remains the property of the Manufacturer; it may not be reproduced or copied, even partially.
Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 1
Page 10 of 35
2.5 High temperatures
Mechanical parts are lubricated to prevent them overheating as a result of prolonged friction. The lubricating oil is indicated below
in this manual and takes into account the specifications of the pumps that make up the assembly. There is no probable risk
provided normal maintenance procedures are followed.
Operators should use appropriate personal protective equipment provided, including work wear and gloves.
2.6 Stability
Instructions are supplied with LEUCO pumps to ensure a stable and safe assembly on the machine/system that incorporates them.
The assembler/operator must follow these instructions carefully.
The pumps were designed and built so that they do not present any hazard in terms of stability in conditions of normal use.
2.7 Pressurised liquids
The pumps described in this manual are built using materials that are capable of tolerating the envisaged operating pressures. They
are complete with all the necessary parts (plugs, valves, plungers, etc..) for the correct operation and circulation of the liquids
(water and lubricating oil). The lubricating transmission products contained in the pump body are used to safeguard correct pump
operation by keeping the mechanical parts lubricated.
3SAFETY
3.1 General safety instructions
Hawk pumps were designed to be safe to operate for the intended purposes, provided they are run (incorporated), used and
maintained according to the instructions in these operating and maintenance instructions.
Before attempting to install or use the pumps, the machine operators and any other personnel involved must read and understand
the instructions provided in the manual and the project data for installation.
Do not tamper with equipment. The manufacturer is not liable in case of incorrect pump operation or for
any damage resulting from use of the product if tampering is suspected.
Before using the equipment, make sure that any safety hazard has been eliminated.
Operators must follow the safety instructions below:
Do not attempt to remove or alter any part of the pump, unless instructed in this manual and in the manner
described.
Only qualified technical personnel authorised by the Manufacturer may undertake internal inspections, modifications
or repairs.
Do not allow unauthorised personnel to tamper with the equipment.
Do not wear rings, wrist watches, jewellery, loose clothing or items like neck ties, scarves, torn clothing, unbuttoned
jackets or shirts with open zips, as these could get caught in moving
parts.
More information is provided in section 5 “Installation”.

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Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 1
Page 11 of 35
Wear appropriate personal protective equipment as specified in the manual for the work to be carried out.
Make sure all the steps described in the section on maintenance are carried out regularly.
The equipment must be taken out of service immediately in case of malfunction or damage that could affect its
operation and safety.
Notify the personnel in charge of maintenance in case of any operating anomaly.
Make sure that all protective guards and other devices are in place and that all safety devices are present and
working properly (pump crankcase and the safety devices on the machine/system where the pump is fitted).
Check that the direction of rotation of the motor is the same as that of the pump when it is started up for the first
time or after any maintenance.
Make sure all the steps described in the section on maintenance are carried out regularly.
3.2 Residual risks
The pumps were designed and built in order to eliminate any risks associated with their operation. The residual risks are described
below:
a) Crushing:
Handling and positioning the pump may bring the risk of crushing the upper limbs or hands or feet. Pay particular attention when
undertaking these actions. It is compulsory to wear the personal protective equipment provided (work gloves and boots) and to
comply with all the procedures designed to safeguard the correct completion of the operating cycle.
b) Heat-related hazards:
The pump can reach high temperatures during operation depending on the temperature of the pumped liquid. As a result, the
person in charge of the installation must bear this in mind and provide appropriate safety devices and warning signs for personnel.
Pay attention when operating pumps from the XLTI..HT, NMT..HT, XXT..HT range as they may reach
temperatures up to 85°C.
Check if there are any other safety instructions that must be followed in the Operating and Maintenance
Manual for the machine where the pump is fitted.

This Manual remains the property of the Manufacturer; it may not be reproduced or copied, even partially.
Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 1
Page 12 of 35
3.3 Personal protective equipment
Failure to use the personal protective equipment specified in this section will expose the machine
operators to danger.
Employers are required to provide personal protective equipment to the operators
using the machine referred to in this manual.
The operators using the equipment must wear the following personal protective equipment, in line with the work being carried
out:
Personal protective equipment against the risk of cuts, bruises and high temperatures (max 85 °C)
Work boots
Safety goggles or glasses (if necessary)
The Employer may decide to use additional safety equipment after assessing any risks and considering any changes made to the
production processes.
3.4 Working safely
To reduce the consequences of the hazards described in the section above, operators must comply with the following instructions:
Wear the personal protective equipment referred to in section 3.3;
Monitor areas where any hazard is present, do not start a test cycle if there are any persons located within the
hazardous area or in the immediate vicinity who are not involved in the job to be undertaken. Release the controls
immediately should any unauthorised persons enter the hazardous area when work is underway.
3.4.1 Safety when using the pump
The area and environment that the high pressure system operates in must be clearly signposted and prohibited to unauthorised
personnel. The area should also be restricted and defined. The staff responsible for carrying out the work must first undergo
workplace conduct training as well as training on the risks arising from high pressure system damages or defects.
Prior to starting up the system, the operator or operators are required to check that:
•the system has the correct power supply;
•the electrical parts are correctly and adequately protected and work efficiently;
•the high pressure hoses and hose fittings do not exhibit signs of abrasion or excessive wear.
Any defect, damage or reasonable doubt that might arise before or during the operation must be reported and verified by qualified
staff. Should this happen, the system must be stopped immediately and the pressure brought down to zero.
3.4.2 Safety when using high pressure circuits
Here below are some basic indications regarding the high pressure circuit where the pump can be installed.
High pressure circuits should always be fitted with a safety or pressure relief valve.
Components of the high pressure circuits, particularly those that mainly operate outdoors, must be resistant o weather conditions
such as rain, frost or heat. All electrical parts should have adequate protection against direct or indirect sprays of water and be
suitable for use in wet environments.
High pressure hoses must be sized in accordance with the maximum operating pressure of the circuit and always within the field of
operation specified by the hose manufacturer. These precautions should also be followed for all the components found within high
pressure circuits. The ends of the high pressure hoses should be sheathed or, in any event, secured to a structure in order to
prevent dangerous whiplash in the event of a blast or a rupture in the connections.
Lastly, appropriately sized crankcases must be provided in order to protect the rotating component parts for the motion
transmission (flexible couplings and universal joints, belts, pulleys, etc.).
Check if there are any other safety instructions that must be followed in the Operating and Maintenance
Manual for the machine where the pump is fitted.

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Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 1
Page 13 of 35
3.4.3 Rules of conduct regarding the use of high pressure lance
Here below are some basic indications regarding the use of the pump with high pressure lance equipment.
Those who operate high pressure nozzles must always put their own safety - as well as the safety of third parties likely to be
affected by their actions - before any other assessment or action in respect of the situation. Their work must always be guided by
common sense and an awareness of responsibility and precautions. The operator should not be distracted while working, for any
reason.
The operator must always have appropriate personal protective equipment that guarantee good grip and stability on the ground in
wet conditions.
The area affected by the water jet must be restricted and free from objects which, if hit by the jet, might be damaged or projected
elsewhere.
The jet should always be aimed in the direction of the workspace, including during preliminary or trial operations.
Attention must always be paid to the trajectory of debris removed from the jet. If necessary, anything that might be exposed to the
jet should be given adequate protection.
3.5 Safety during lifting and handling
Before starting work, clear the work area so that the lifting and movement of materials can be safely
undertaken.
Only authorised, qualified personnel who have received specific training may perform unloading, loading,
handling and lifting operations.
People who are not involved in the operations must keep at a safe distance during lifting and handling.
All equipment used for lifting and transport, including accessories (such as hooks, ropes and chains),
must be of a suitable capacity and checked regularly according
to legal standards.
3.5.1 Packing, unpacking and transport
The packing used for Hawk pumps was designed specifically to prevent damage caused by impact or vibration during transport or
handling.
Each pump is packed so that it is protected from stress and impact, and will not be damaged during transport.
Based on the amount of goods to be shipped and the final place of destination, the packed pumps can be placed on a pallet to
facilitate lifting and handling.
When unpacking, check the parts are intact and they are the correct amount. If any parts are damaged or missing, contact your
dealer or the Manufacturer for instructions.
Dispose of packing materials correctly according to legal obligations.
Different means of transport may be used to ship Hawk pumps (road, rail, sea or air) depending on their final destination.
Secure the packs to the vehicle properly during transport to prevent movement.
Failure to comply with these instructions may lead to situations of extreme danger.
Manual handling of loads must comply with ISO 11228-1, or any applicable national legislation.
Check if there are any other safety instructions that must be followed in the Operating and Maintenance
Manual for the machine where the pump is fitted.

This Manual remains the property of the Manufacturer; it may not be reproduced or copied, even partially.
Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 1
Page 14 of 35
3.6 Safety during Maintenance
Follow the instructions below whenever carrying out any maintenance or repair work:
Depressurise the water system and disconnect the pump from any power source before starting any
maintenance or repair work.
Before starting work, hang a "MACHINE UNDERGOING MAINTENANCE" sign in a prominent position on the
machine/system where the pump is fitted
Do not use solvents or flammable chemicals or materials for cleaning that could generate static electricity
Be careful not to spill any oil or lubricant
When you have finished the job, replace any safety guards and covers that were removed or opened and secure them
properly.
Only qualified technical personnel are authorised to carry our maintenance/repair work.
3.7 Products used
All the products used during normal operation, including oils, lubricants and cleaning products, must be used as instructed in the
safety notices provided by the manufacturer.
Use the oil already in the pump for the first 50 hours and then replace with SAE 10/40W oil, as shown on
the label.
The TXT pumps are already filled with SAE 10/40W oil, as these pumps are already run-in when they are delivered by the
Manufacturer.
Dispose of used oil correctly according to legal obligations.
3.8 Product Labels
The hazard, warning and compulsory signs illustrated in this manual are placed in the vicinity of the equipment.
Providing an exact description of the pump, model, serial number and technical data makes it easier for the technical personnel to
deliver a fast and efficient service (if needed).
The identification data is on the label attached to the equipment, as shown below.
Do not remove (or change the position) of any type of id plate and/or labels containing information
and/or warning notices on the equipment.
FAC –SIMILE
Machine Id Plate

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Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 1
Page 15 of 35
The label* is attached to the plug on the
top of the pump body.
*the label on the plug is the same colour
as the plug and so may vary depending
on the model of pump.
Other signs on the equipment
3.9 First Aid
A brief description follows of some of the standard First Aid procedures that may be useful in case of injury when using the pump
or the machine/plant where it is fitted.
They may be useful if a machine operator has to handle an emergency when using the equipment during the various stages of its
working life (transport, installation, operation, maintenance, adjustments, etc.) or assist others in the direct vicinity of the
equipment.
3.9.1 First aider duties
a) Calls for help (emergency call);
b) Assesses the condition of the injured person and sustains their vital functions, if necessary;
c) Stops the flow of blood;
d) Protects wounds and burns;
e) Protects the injured person from further injury;
f) Does not take any unnecessary or potentially harmful initiative like moving the injured person or giving him a drink,
attempting to treat sprains and/or broken bones, etc..
3.9.2 Emergency Call
To be sure of a successful outcome, it is important to make sure the emergency services can reach the place of the event without
delay.
So it is very important that the first aider who calls the emergency services, gives the following information:
-The address where the accident (or medical emergency) has taken place;
-How many people are injured (or ill);
-What may have caused the emergency;
-The status of the injured person’s vital functions, whether he is conscious or not, and whether he is breathing normally or
not.
After confirming the above information, it is advisable to:
give your own name and a telephone number where you can be reached;
wait outside for the emergency services to arrive (near the main entrance, for example).
Calling the emergency services is of major importance. Do everything you are instructed to do by the emergency team to
ensure a successful outcome.
3.9.3 Injuries
What to do in case of sprains, dislocations or broken bones:
Use a splint or a bandage to immobilise the area where the injury occurred, in the position that causes less pain for the injured
person and without attempting any unnecessary and potentially harmful manoeuvres. Apply a cold pack (an ice pack or similar).
In case of an open fracture, apply pressure away from the fracture to stop the bleeding and then cover the injury with a sterile
dressing.

This Manual remains the property of the Manufacturer; it may not be reproduced or copied, even partially.
Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 1
Page 16 of 35
Bruises, crushing:
If the upper or lower extremities of a limb have been bruised and/or crushed (fingers, hands, feet, etc.), put the affected
limb immediately under (cold) running water and then apply an ice pack. Check for open wounds and/or cuts and disinfect the
affected area if necessary.
3.9.4 Bleeding
It may be necessary to apply direct pressure to the bleeding area using a sterile dressing, lift the limb and apply pressure upstream
to the origin of the bleeding with a tourniquet
Surface wounds:
Expose the wound and clean it with water, disinfect it with saline solution and medicate it, covering it with a sterile dressing. Cover
this with a bandage without tightening the bandage excessively to permit normal circulation.
Deep wounds:
Wearing gloves and a facemask to protect yourself from the risk of infection is a priority. Compress the area until the bleeding stops
or the ambulance arrives by applying direct pressure or using other pressure points. Call the emergency services (each country has
its own number for the emergency services) and inform them that the person has arterial bleeding.
Do not attempt to treat the wound before the bleeding has been controlled.
Do NOT use cotton wool, alcohol or antibiotic powder to disinfect a wound.
Always remember to wear latex gloves to prevent contact with body fluids.
4INTENDED USE
4.1 Intended use
Hawk pumps must not be used for any other purposes than those described in these instructions. Complying with the terms of use,
repair and maintenance specified by the Manufacturer in strict accordance are an essential element with regard to the intended
use.
The Hawk pumps described in these instructions were designed and built to be incorporated in cleaning machines/equipment (high
pressure cleaner). In addition, they must be used in a way that corresponds to their technical characteristics (par. 2.1.1), without
undergoing any modifications that have not been agreed upon or that are being used for improper purposes.
The pump may ONLY be used and fitted by trained and qualified personnel who are familiar with the
information in this manual.
Do not operate the pump until the machine where it is fitted has been declared as compliant with current
legal standards (e.g. Directive 2006/42/EC ).
4.2 Improper Uses
The equipment must not be used:
By any recipients other than those referred to in 1.1.2
For any other uses than those described in section 2 and section 4.1
In any other operating conditions than those described in section 2.2
For pumping liquids that are flammable, toxic, corrosive or with an unsuitable density or temperatures higher than those
specified in the technical data listed in this document or on the product’s specifications label
For pumping drinking water
For food uses

This Manual remains the property of the Manufacturer; it may not be reproduced or copied, even partially.
Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 1
Page 17 of 35
For pharmaceuticals
In potentially explosive atmospheres (see the specific Hawk product range)
The Manufacturer reserves the right to review the terms of the guarantee if the equipment is used for any
other purpose than those mentioned above.
5INSTALLATION AND ASSEMBLY
Read this chapter with due care before starting to install the machine.
Failure to install the pumping system correctly can result in injury or damage to property: it is important
to follow all the points below.
General scheme:
A) Tank or mains water supply
B) Shut-off valve
C) Suction filter
D) Auxiliary pump
E) Suction pressure gauge
F) Delivery pressure gauge
G) Safety valve
H) Pressure damper
I) By-pass and control valve
J) Nozzle
a) Supply pipe line
b) Delivery pipe line
c) Safety valve release pipe line
d) By-pass pipe line
e) Valve outlet pipe line

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Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 1
Page 18 of 35
5.1 Responsibilities of the Customer/User
The customer/User is responsible for:
Checking the condition of the pump when it is delivered. Contact LEUCO S.p.A. in case of damage or
conditions that do not match the purchase order
The assembler/end user is responsible for choosing the type of motor - pump coupling and for following
the instructions in this document.
The assembler/end user must fit a maximum pressure valve near the pump delivery line outlet.
The assembler/end user must fit a system that guarantees the hydraulic system will stop immediately in
case of a sudden increase in the pump temperature and/or excessive current absorption.
5.1.1 Placing
The pump must be placed horizontally using the M16 support feet provided.
The base used must be sufficiently flat and rigid so as to avoid bending and misalignment on the pump/transmission axis due to
the output torque transmitted during operation.
You might also require vibration dampers, to be placed between the floor and the pump support.
The pump is equipped with a lifting hoop to facilitate handling and installation (Figure 1).
The oil level plug must always be accessible with the pump mounted.
We therefore recommend the following types of transmission:
•Flexible coupling
•Belts and pulleys
•Motion reducer
Rigid connections on the pump shaft should be avoided.
You must replace the crankcase end cap for transportation with the dipstick plug, verifying the correct amount of
fluid in the pump.
Follow the instructions provided in the Operating and Maintenance Manual for the machine where the pump is
fitted for all connections.
figure 1
figure 1

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Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 1
Page 19 of 35
figure 2
5.1.2 Rotation direction
The direction in which the pump shaft operates could be indifferent; it is, however, advisable that the operating rotation shown in
Figure 2 be applied.
5.1.3 Plumbing connections
We recommend the use of flexible piping to isolate the system from the vibrations induced by the pump. The stiffness of the flexible
suction hose should be sufficient to prevent it from becoming deformed due to the depression produced by the pump.
5.1.4 Suction line
In order to ensure smooth operation of the pump, the intake duct should be as described in the following recommendations:
The pump requires a pressure of 3 bar to work correctly. If a centrifugal pump is used, it must be sized to ensure an intake
rate of at least twice the nominal capacity of the pump.
It should have a diameter that is proportional to the suction port connection; localized narrowing should therefore be
avoided as it can generate pressure drop and cavitation phenomena;
It should maintain as steady and as straight a flow as possible and be made in such a way as to facilitate the evacuation of
any air pockets;
It should be free from leaks and made to ensure tightness over time;
It should be as free as possible from 90° bends, connections with other pipelines, bottlenecks, counterslopes, inverted U-
shaped curves and T-joints;
It should be designed in such a way as to prevent the circuit from emptying when the pump stops;
Avoid hydraulic type fittings;
Avoid the presence of Venturi-type injectors for chemical suction;
Avoid the presence of foot valves or other one-way valves;
When connected to a supply tank, ensure that the dimensions of the intake duct are such that no eddies and turbulence
are generated in the vicinity of the pump suction pipe outlet;
It should avoid the use of by-pass valves with direct discharge to suction;
It should provide any bulkheads inside the suction tank, if any, for the purpose of preventing the flow coming from the by-
pass valve from creating eddies and turbulence near the pump suction pipe outlet;
Ensure the intake duct is always clean.
5.1.5 Filter
Should you plan to install a suction filter on the pump, follow the recommendations below:
•Place the filter as close as possible to the pump and in such a way as to allow easy inspection;
•The minimum flow rate should be three times higher than the pump capacity;
•The diameter of the inlet and outlet should be the same as the pipe and the pump suction pipe outlet;
•Perform regular and frequent cleaning in accordance with the specific working conditions of the application.

This Manual remains the property of the Manufacturer; it may not be reproduced or copied, even partially.
Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 1
Page 20 of 35
5.1.6 Discharge line
The discharge line should be as described in the following rules and recommendations:
•The initial section of the discharge pipe should be made via a flexible hose in order to dampen the vibrations induced by
the pump.
•Use high-pressure pipes and fittings to guarantee a wide safety margin in all operating conditions;
•Always ensure the presence of properly-adjusted pressure relief valves;
•It is preferable to use glycerine filled pressure gauges that are designed to withstand the shock loads and water hammers
that are typical of piston pumps;
•Always bear in mind that pressure drops along the pipe result in a reduction of the effective pressure at the end of the
line compared to the pressure measured at the pump;
•Should the effects of the pulse be particularly harmful, use a pulse damper.
5.2 Pre-commissioning instructions
A series of checks and controls must be completed before starting up the pump for the first time in order to prevent errors or
accidents during commissioning:
•That the rotation direction of the pump is correct.
•Always avoid operating the pump under load.
•Always discharge the pressure regulating valve or use the discharge mechanisms, where present.
•Check that the speed does not exceed the value indicated on the nameplate.
•Wait a few minutes before pressurizing the circuit, making sure that the pump is sucking properly.
•Before stopping the pump, reset the pressure to zero by discharging the pressure regulating valve or using the circuit’s
discharge mechanisms, where present. If the pump is coupled to an endothermic motor, bring the motor down to its
lowest speed before stopping it altogether.
•Where there is a feed pump on the suction circuit, wait until it has reached the expected pressure before starting up the
piston pump.
If the equipment does not appear capable of running safely and correctly, TAKE IT OUT OF SERVICE until it
has been repaired or any damaged parts have been replaced.
5.3 Long periods of inactivity
In case of long periods of inactivity, follow the instructions below:
Run the pump with clean water for several minutes.
Run the pump dry for about 10 seconds with the delivery line open (lance) to drain the pump and the delivery circuit and
prevent the formation of scale.
Clean the pump with water and solvents authorised by current legal standards.
Dry the pump using compressed air.
Grease any unpainted parts.
Do not let the system come into contact with corrosive substances.
The properties of mineral oils are impaired if they are not used or remain inactive for more than
six months, and so must be replaced.
When resuming operation of the machine after a long period of inactivity, repeat the checks carried out
prior to the initial start up (section 5.2). 5.2). Also check the screws and the level of the oil.