Hatz Diesel H50 Series User manual

ASSEMBLY
INSTRUCTIONS
H50

1
General information.......................................................................................................................................6
1. Safety..........................................................................................................................................8
1.1 General information.................................................................................................................................8
1.1.1 Intended use....................................................................................................................................8
1.1.2 Machine user or machine manufacturer obligations.......................................................................9
1.1.3 Representation of safety notes .......................................................................................................9
1.1.4 Meaning of safety symbols............................................................................................................11
1.2 Safety notes...........................................................................................................................................12
1.2.1 Operational safety.........................................................................................................................12
1.2.2 Machine-specific safety instructions for operation........................................................................14
1.2.3 Machine-specific safety instructions for maintenance work..........................................................15
1.2.4 Electrical equipment......................................................................................................................17
1.3 Labels....................................................................................................................................................18
2. General information about the H50 engine................................................................................19
2.1 Technical data.......................................................................................................................................20
2.1.1 Engine information and filling quantities .......................................................................................20
2.1.2 Engine specifications ....................................................................................................................20
2.1.3 Weights (without operating fluids).................................................................................................21
2.1.4 Engine type plate ..........................................................................................................................21
2.2 Power data H50.....................................................................................................................................22
2.2.1 Power data H50.............................................................................................................................22
2.3 Engine design........................................................................................................................................23
2.3.1 Fan2Flywheel (F2F) TIC ...............................................................................................................23
2.3.2 Fan2Flywheel TICD ......................................................................................................................25
2.3.3 OpenPowerUnit (OPU) TIC...........................................................................................................26
2.3.4 SilentPack TI/TIC ..........................................................................................................................28
3. Transport...................................................................................................................................29
3.1 Transport conditions..............................................................................................................................30
3.2 Transport damage.................................................................................................................................30
3.3 Transport safety ....................................................................................................................................30
3.4 Temporary stoppage .............................................................................................................................31
3.5 Packaging..............................................................................................................................................31
4. Assembly instructions................................................................................................................32
4.1 Assembly notes –general information..................................................................................................32
4.2 Engine suspension, installation.............................................................................................................32
4.2.1 Engine brackets.............................................................................................................................33
4.2.1.1 Standard.....................................................................................................................................33
4.2.1.2 for hydraulic power take off........................................................................................................33
4.2.1.3 OpenPowerUnit (OPU)...............................................................................................................33
4.2.2 Rigid engine suspension...............................................................................................................34
4.2.3 Flexible engine mounting ..............................................................................................................34
4.2.3.1 Vibration damper........................................................................................................................37
4.2.3.2 uniform bearing load ..................................................................................................................39
4.3 Energy balance .....................................................................................................................................40
4.4 Installation of engines under a cowling.................................................................................................40
4.5 Engine cooling.......................................................................................................................................40
4.5.1 General: Attachment of the water cooler ......................................................................................40
4.5.1.1 Installation under a cowling........................................................................................................41

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4.5.1.2 Cooling water hoses...................................................................................................................41
4.5.1.3 Installation in combination with a cab heater .............................................................................42
4.5.1.4 The thermostat...........................................................................................................................42
4.5.2 Coolant..........................................................................................................................................43
4.5.3 Engine radiator..............................................................................................................................43
4.5.3.1 Water circuit piping.....................................................................................................................44
4.5.3.2 Expansion tank...........................................................................................................................44
4.5.3.2.1 Positioning of the expansion tank ...........................................................................................44
4.5.3.2.2 Overview of expansion tanks..................................................................................................45
4.5.3.2.3 Expansion tank tubing.............................................................................................................45
4.5.3.2.4 Piping of the cab heater ..........................................................................................................46
4.6 Fuel system...........................................................................................................................................47
4.6.1 Fuel ...............................................................................................................................................47
4.6.2 Fuel specifications.........................................................................................................................48
4.6.3 Fuel schematic with prefilter, water separator and feed pump .....................................................49
4.6.3.1 Electrical fuel feed pump............................................................................................................50
4.6.4 Fuel filtration..................................................................................................................................50
4.6.4.1 Main fuel filter.............................................................................................................................50
4.6.4.2 Fuel prefilter ...............................................................................................................................52
4.6.4.3 Fuel tank.....................................................................................................................................52
4.7 Exhaust gas system ..............................................................................................................................54
4.7.1 Mass flow rate H50TIC [m³/h] .......................................................................................................54
4.7.2 Permissible exhaust gas back pressure .......................................................................................55
4.7.3 Recommended dimensioning of the exhaust gas system ............................................................56
4.7.4 Exhaust gas piping downstream of exhaust gas aftertreatment...................................................56
4.7.5 Silencer TI.....................................................................................................................................58
4.7.6 DOC mounted on the engine side.................................................................................................59
4.7.7 DOC separated .............................................................................................................................60
4.7.8 Silencer TIC/TICD.........................................................................................................................61
4.7.9 Diesel particulate filter (DPF) ........................................................................................................61
4.8 Intake and combustion air system.........................................................................................................64
4.8.1 Schematic......................................................................................................................................64
4.8.2 Air filter selection, dimensioning and intake section .....................................................................65
4.8.2.1 Air filter installation above the engine TI/TIC/TICD....................................................................67
4.8.2.2 Tilted positions of the air filter ....................................................................................................67
4.8.2.3 Intake section.............................................................................................................................69
4.8.3 Design of the combustion air line/intake negative pressure .........................................................70
4.8.4 Possible connection options..........................................................................................................72
4.9 Lubricating oil ........................................................................................................................................72
4.9.1 Filling quantities.............................................................................................................................73
4.9.2 Lubricating oil system....................................................................................................................73
4.9.3 Oil service points...........................................................................................................................73
4.9.4 Oil filter mounting options..............................................................................................................75
4.9.5 Continuous skewed positions........................................................................................................75
4.9.5.1 Continuous skewed positions F2F.............................................................................................75
4.9.5.2 Continuous skewed positions OPU............................................................................................76
4.9.5.3 55° tilting positions, special package .........................................................................................76
4.9.5.3.1 Installation of crankcase ventilation (ProVent) 55° tilt positions .............................................77
5. Engine specifications.................................................................................................................81
5.1 Fan-To-Flywheel (F2F)..........................................................................................................................81
5.2 Open Power Unit (OPU)........................................................................................................................82
5.3 Combination cooler with integrated expansion tank .............................................................................82
5.3.1 Checking the coolant level............................................................................................................82
6. Electrical system .......................................................................................................................83

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6.1 Engine control .......................................................................................................................................83
6.1.1 Control unit....................................................................................................................................84
6.1.2 Control unit setup..........................................................................................................................85
6.1.3 Connections ..................................................................................................................................86
6.1.4 Control unit installation..................................................................................................................86
6.1.5 Diagnostics tool.............................................................................................................................88
6.1.5.1 Flash codes EDC17 CV54.........................................................................................................88
6.1.5.2 CAN message list.......................................................................................................................88
6.2 Engine monitoring (engine control and sensor system)........................................................................89
6.2.1 Actuators (speed adjustment), display instruments......................................................................89
6.2.2 Resetting the service interval........................................................................................................91
6.2.2.1 ttCAN..........................................................................................................................................91
6.2.2.2 tmCAN........................................................................................................................................91
6.2.2.3 IFM panel ...................................................................................................................................92
6.2.2.4 CAN command...........................................................................................................................93
6.2.3 Start/stop control by means of ECU –danger avoidance.............................................................94
6.2.3.1 Danger avoidance measures in moving applications (vehicles)................................................94
6.2.3.2 Measures for danger avoidance in non-self-propelled applications...........................................94
6.3 Battery sizes..........................................................................................................................................95
6.3.1 Battery recommendations .............................................................................................................96
6.3.2 Installation location........................................................................................................................97
6.4 Starter....................................................................................................................................................97
6.4.1 Possible starter mounting positions ..............................................................................................97
6.4.2 Dimensioning of the cables between the starter and battery........................................................98
6.5 Alternator...............................................................................................................................................99
6.5.1 Charge curve 12V .........................................................................................................................99
6.5.2 Charge curve 24V .........................................................................................................................99
6.6 Hatz terminal designation CV54..........................................................................................................100
6.7 Cabling ................................................................................................................................................101
6.7.1 Cabling of "Fan 2 Flywheel (F2F)" CV54....................................................................................103
6.7.2 Cabling of "Fan 2 Flywheel (F2F)" C81.......................................................................................104
6.7.3 Cabling of "Open Power Unit (OPU)" CV54................................................................................104
6.7.4 Cabling of "Open Power Unit (OPU)" C81..................................................................................105
6.7.5 Pin assignment/Cabling by customer..........................................................................................105
7. Power take off .........................................................................................................................106
7.1 Main take off (flywheel side)................................................................................................................106
7.1.1 Combined flywheel 6.5"/8" with connecting housing/10 inch flywheel........................................107
7.1.2 Connecting housing with outside bearing ...................................................................................109
7.1.3 Power take off .............................................................................................................................110
7.1.3.1 not separable............................................................................................................................110
7.1.3.2 Belt drives.................................................................................................................................110
7.1.3.3 Hydraulic pumps on the main take off......................................................................................112
7.1.4 Couplings ....................................................................................................................................113
7.3 Power take off .....................................................................................................................................116
7.3.1 Hydraulic power take off..............................................................................................................116
7.3.1.1 Hydraulic pump power take-off ................................................................................................116
7.3.2 A/C compressor...........................................................................................................................117
8. General limits of use................................................................................................................118
8.1 Cold start capability.............................................................................................................................118
8.2 Maximum permissible speed in coasting overrun...............................................................................119
8.3 Block heater.........................................................................................................................................120

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9. Contact protection for machine safety .....................................................................................121
9.1 Hot surfaces and rotating parts...........................................................................................................121
9.2 Contact protection ...............................................................................................................................124
10. Maintenance..........................................................................................................................125
10.1 Accessibility of service points............................................................................................................125
10.2 Maintenance intervals .......................................................................................................................126
11. Engine preservation...............................................................................................................127
12. Test of the engine installation (checklist)...............................................................................128
12.1 Assembly note...................................................................................................................................128
12.2 Initial startup......................................................................................................................................128
12.3 Testing of engine choice and engine environment ...........................................................................131
12.4 Testing of engine equipment.............................................................................................................131
12.5 Testing of accessibility to operating and service points....................................................................132
12.6 The installation approval ...................................................................................................................133
12.6.1 Prerequisite for carrying out the installation inspection ............................................................133
13. Functional safety ...................................................................................................................133
13.1 Speed adjustment .............................................................................................................................133
13.2 Fault compensation reactions ...........................................................................................................134

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This symbol stands for important safety instructions.
Please heed carefully to prevent dangers to persons and material.
In addition, the general statutory safety regulations and those of the responsible professional
trade associations apply.
If you have any questions, please contact your nearest Hatz service station before
commissioning the machine.
These Assembly Instructions have been translated into multiple languages. The original
Assembly Instructions are in German. All other language versions are translations of the
original Assembly Instructions.
Modifications, which serve the technical improvements, are reserved.

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General information
Our engines are state of the art and meet the basic safety and health requirements specified
in the EC - Machinery Directive (2006/42/EC) These Assembly Instructions contain important
instructions on how to safely assemble the engine. In addition, the rules and regulations for
accident preventions applicable for the place of use must be heeded.
The engine provides a high degree of operational safety and a high quality standard which is
ensured by a certified quality management system (EN ISO 9001). Proper functioning of all
engines is checked prior to leaving the factory.
HATZ diesel engines are efficient, robust, and have a long service life. Therefore, they are
usually installed in machines that are used for commercial purposes.
This HATZ engine is intended exclusively for the purpose that the manufacturer of the
machine in which the engine is installed has specified and tested. Any other use is
considered improper. Responsibility is not accepted by Motorenfabrik HATZ for any danger
and damage resulting from this situation. The user alone bears the risk. Intended use also
includes adherence to the maintenance and repair instructions prescribed for this engine.
Non-observance may lead to engine damage You must read the manual for diesel engine
before starting the first time. It will help you avoid accidents, operate and maintain the engine
correctly and, hence, ensure long term service.
Give the manual for diesel engine to any further users or subsequent owner of the engine.
Have service work performed by qualified technicians only. We
recommend that you work with one of the more than 500 HATZ
service centers.
Trained specialists there will repair your engine with original
HATZ spare parts and with HATZ tools. The global HATZ service network is at your
disposal to advise you and supply you with spare parts. For your nearest Hatz service
station, please look at www.hatz-diesel.com on the Internet.
It is forbidden to start the engine before it is fully installed.
Modifications without the prior approval of HATZ will invalidate the warranty.
Installation must only be carried out by qualified technicians in accordance with these
Assembly Instructions, all safety-related measures and statutory regulations. After the
installation of the engine, the machine manufacturer is responsible for ensuring that
all relevant statutory directives and regulations are fulfilled. The operator must
become familiar with the manual for diesel engine prior to commissioning in order to
avoid danger to personnel and potential material damage.
Motorenfabrik HATZ GmbH & Co. KG takes no responsibility for injury to personnel or
damage to the machine arising from non-observance of the assembly instructions or
manual for diesel engine. Damage resulting from non-observance of the assembly
instructions or the manual for diesel engine will forfeit any warranty on the part of
Motorenfabrik HATZ GmbH & Co. KG and responsibility shall be transferred to the
machine manufacturer/user.

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Depending on the use and installation of the engine, it may be necessary for the machine
manufacturer and machine user to install safety equipment to prevent inappropriate use, such
as:
Parts of the exhaust gas system and the engine surface naturally become hot and must
not be touched during operation or until they cool down after the engine is switched off.
Suitable precautions must be taken for this.
Incorrect cable connections and incorrect operation of the electrical equipment can lead to
sparking and must be avoided.
After the engine is installed in the machine, rotating parts must be protected against
contact.
It is essential to heed the starting instructions in the manual for diesel engine prior to
commissioning the engine.
Prior to starting, ensure that all safety devices provided are attached and functional.
The engine must only be operated, maintained and repaired by persons who are trained in
this work.
Protect the starting key from unauthorized access.
Never run the engine in closed or poorly ventilated rooms. Do not breathe in the exhaust
gases - danger of poisoning.
Fuels, lubricants, coolants and cleaning agents can contain toxic elements. Heed the
instructions (safety datasheets) of the manufacturer in this regard.
Only carry out maintenance and repair work when the engine is switched off (disconnect
the negative terminal of the battery).
Only refuel when the engine is switched off. Never smoke in the vicinity of open flames or
sparks that can cause ignition.
Keep explosives and flammable materials away from the engine because the engine
surface –and especially the exhaust gas system –becomes very hot during operation.
Only wear close fitting clothing when working on a running engine. Do not wear
necklaces, bracelets or other items that could get caught.
Comply with all notices and warning labels on the engine and keep them in a legible
condition. If a label should become detached or difficult to read, it must be replaced
promptly. For this purpose, contact your nearest Hatz service station.
Any improper modification of the engine will result in a loss of liability coverage for
resulting damage. Only regular maintenance, as specified in the manual for diesel engine,
will maintain the operating readiness of the engine.
If you have any questions, please contact your nearest Hatz service station before
commissioning the engine.

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1. Safety
1.1 General information
Introduction
This chapter contains the information you need to work safely with this machine.
To prevent accidents and damage to the machine, it is imperative to follow all specified safety
instructions.
Read this chapter carefully before beginning work.
1.1.1 Intended use
Intended use
The machine described in these Assembly Instructions fulfills the following functions:
Diesel engine intended for installation in a machine or for assembly with other machines
to form a machine.
This engine is intended exclusively for the purpose specified and tested by the manufacturer
of the machine in which the engine is installed.
Any other use is not intended and therefore not permitted. Violations compromise the safety
of the personnel working with the machine. Motorenfabrik HATZ does not accept any
responsibility for damage resulting from this.
The operational safety of the machine is only guaranteed if it is used as intended.
Use according to the intended purpose also includes observance of the instructions in these
assembly instructions and the manual for diesel engine.
Foreseeable misuse
The following is considered to be foreseeable misuse:
Any use that varies from or extends beyond the uses specified above.
Failure to comply with the instructions given in this manual.
Failure to comply with the safety instructions.
Operation of the machine when it is not in a functional and technically safe condition.
Failure to perform the necessary inspection and maintenance work.
Any unauthorized modification of or removal of safety equipment.
Use of spare parts and accessories that are unsuitable or do not correspond to HATZ
specifications.
Operation in flammable or hazardous environments.
Operation in closed-off or poorly ventilated rooms.
Installation of the machine in a closed-off room without additional measures in the area of
the incoming and outgoing air and the exhaust air.
Improper operation at variance with DIN 6271-3 / ISO 3046-1 and ISO 8528 (climate,
load, safety).

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Residual risks
Residual risks result during daily use and in association with maintenance work.
Reference is made to these residual risks in chapter 1.2.2 Machine-specific safety
instructions for operation, page 14 and in chapter 1.2.3 Machine-specific safety instructions
for maintenance work, page 15 as well as in other chapters of these instructions and in the
manual for diesel engine directly before the relevant descriptions or handling instructions.
1.1.2 Machine user or machine manufacturer obligations
Machine manufacturer obligations
These assembly instructions contain important information on how to safely assemble the
engine.
It is forbidden to start the engine before it is fully installed.
In addition, please note that it is forbidden to start up the machine before it has been
determined that the machine in which this engine is installed fulfills all safety-related
requirements and legal regulations.
User obligations
The operator is obliged to only operate the machine when it is in perfect condition. The
operator must check the condition of the machine before use and ensure that any defects are
eliminated before it is taken into service. Running the machine while identified defects exist is
not permitted. The operator must also ensure that all persons who work on the machine are
familiar with the contents of this manual for diesel engine.
Obligations of the operating and maintenance personnel
Personnel assigned with operating and maintaining the machine must have read and
understood this manual for diesel engine or must possess the qualifications necessary for
working with this equipment, acquired in training/instructional courses. No one may work with
the machine without the necessary qualifications, even if for just a brief period. The operating
personnel must not be under the influence of drugs, medication or alcohol. All work
performed on the machine must be in compliance with the information provided in this
manual for diesel engine.
1.1.3 Representation of safety notes
Overview
This machine has been designed and built according to state-of-the-art technology and the
recognized safety standards. Despite these precautions, risks exist when commissioning or
operating the machine and during maintenance work. The risks are identified in this manual
by means of safety notes. The safety notes precede the relevant description or operating
step.

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Structure of the safety notes
The safety notes consist of:
Danger symbol
Signal word
Description of the danger
Possible consequences
Preventative measures
SIGNAL WORD
Type and source of the danger.
Consequences of non-compliance
Action for avoiding/averting the danger
General danger symbol
The general danger symbol is used to identify the danger of personal injury.
Signal words
Signal words identify the magnitude of the risk and the seriousness of possible injury:
Danger symbol/Signal word
Meaning
DANGER
This signal word is used to indicate imminently
dangerous situations which, if not avoided, will lead
to serious injury or death.
WARNING
This signal word is used to indicate potentially
dangerous situations which, if not avoided, may lead
to serious injury or death.
CAUTION
This signal word is used to indicate potentially
dangerous situations which, if not avoided, may lead
to minor or moderate injury.
NOTICE
This signal word, without a warning symbol, is used
to indicate the potential danger of property damage.
NOTE
This signal word indicates additional useful
information for the user, such as operating tips and
cross references.

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1.1.4 Meaning of safety symbols
Explanation of symbols
The following table describes the meanings of the safety symbols used in these Assembly
Instructions.
Symbol
Meaning
Smoking, fire, and open flames are prohibited!
Warning of personal injury!
Warning of hot surfaces!
Warning of flammable substances!
Warning of explosive substances!
Warning of toxic engine exhaust!
Warning of corrosive substances!
Warning of heavy loads!
Warning of environmental damage!
Comply with this manual for diesel engine or additional documentation
from other manufacturers or the carrier.
Important note!
Additional information that is useful to the reader.

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1.2 Safety notes
1.2.1 Operational safety
Introduction
This chapter contains all of the important safety instructions for personal protection and for
safe and reliable operation. Additional, task-related safety instructions can be found at the
beginning of each chapter.
DANGER
Danger to life, danger of injury or danger of property damage
due to failure to comply with the assembly instructions,
manual for diesel engine and the safety instructions
contained therein.
As the operator of the machine, you must ensure that all
people working on the machine are familiar with the content of
this manual.
Before working on the machine, read these manuals carefully,
paying special attention to the safety notes.
Fulfill all required safety conditions before working on the
machine.
Follow all general safety instructions as well as the specific
task-related safety instructions contained in the individual
chapters.
Using the machine
Only operate the machine for the purposes described in chapter 1.1.1 Intended use,
page 8.
Compliance with other regulations
Adhere to the applicable accident prevention regulations of the trade associations.
Comply with the regulations concerning the minimum safety and health requirements for
the use of work equipment by workers at work.
In addition, local safety, accident prevention and environmental regulations also apply
when operating the machine.
Personal protective equipment
During operation and maintenance of the machine, personal protective equipment must be
available and must be used if necessary. The use of personal protective equipment is
specified in the description of the operating steps.
Personal protective
equipment
Pictogram
Function
Safety shoes
Safety shoes offer protection against:
Slipping
Falling objects
Hearing protection
Hearing protection offers protection against
injury to the hearing due to excessive and
constant noise.

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Personal protective
equipment
Pictogram
Function
Safety gloves
Safety gloves protect the hands against
injury, e.g. from battery acid.
Safety goggles
(with side protection)
Safety goggles protect the eyes from flying
objects (e.g. dust particles, spraying
liquids, spraying acid).
Working clothes
Wear close-fitting clothing. It must not
restrict the wearer's freedom of movement,
however.
Warning labels and information signs on the machine
The warning labels and information signs on the machine must be followed (see chapter 1.3
Labels, page 18).
Comply with all notices and warning labels on the engine and keep them in a legible
condition. If a label should become detached or difficult to read, it must be replaced promptly.
For this purpose, contact your nearest Hatz service station.
Maintenance work
Maintenance work that goes beyond the scope described in this manual for diesel engine
must only be performed by qualified technicians (see chapter General information, page 6).
Independent maintenance work and constructional changes to the machine, especially to the
safety equipment, are not permitted.
Safety equipment
Safety equipment must not be modified and must not be rendered ineffective during normal
operation.
General safety instructions
DANGER
Danger to life and danger of injury due to failure to follow the
warnings on the machine, in the assembly instructions and in
this manual for diesel engine.
Follow the warning instructions on the machine, in the
assembly instructions and in the manual for diesel engine.
WARNING
Danger of injury and danger of incorrect operation due to
inadequate personnel qualifications.
The personnel must have read and understood the assembly
instructions and the manual for diesel engine or must possess
the qualifications necessary for working with this equipment,
acquired in training/instructional courses.
Only qualified personnel is permitted to operate, maintain and
service this machine.
Failure to comply will cause the warranty to become void.

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WARNING
Danger of injury due to non-compliance with the handling
instructions and due to unauthorized activities.
Follow all instructions.
Do not perform activities for which no qualification is available.
Contact properly trained personnel if necessary.
CAUTION
Danger of injury from overloading the body.
Lifting the machine to transport it or to move it to another location
can lead to injury (of the back, for example).
Only lift the machine with a hoist (see chapter 3Transport,
page 29).
1.2.2 Machine-specific safety instructions for operation
Introduction
The machine can pose residual risks during operation. To eliminate these risks, all persons
working on the machine must follow the general and machine-specific safety instructions.
If you have an engine that is not yet installed in a machine, it is imperative that you follow the
Assembly Instructions before installing the engine. These Assembly Instructions contain
important information on safe installation.
If the engine is installed in a machine or assembled with other machines to form a machine, it
is prohibited to start the engine before it has been determined that the newly created machine
fulfills all safety-related requirements and applicable legal regulations.
Safe operation
Before switching on the machine, ensure that no one can be injured when the machine is
started up.
During machine operation, ensure that unauthorized persons do not have access to the
area in which the machine has an impact.
The exhaust gas system and the surface of the engine become hot during operation. Risk
of injury due to touching hot parts. Let the engine cool before maintenance.
Do not refuel during operation.
Faults
Immediately eliminate faults that compromise safety.
Switch off the machine and do not take into service again until all faults have been
eliminated.

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Safety instructions for operation
DANGER
Danger to life from inhaling exhaust gases.
Toxic engine exhaust gases can lead to loss of consciousness,
and even death, in closed-off and poorly ventilated rooms.
Never operate the machines in closed-off or poorly ventilated
rooms.
Do not breathe in the exhaust gases.
DANGER
Fire hazard from fuel.
Leaked or spilled fuel can ignite on hot engine parts and cause
serious burn injuries.
Only refuel when the engine is switched off.
Never refuel in the vicinity of open flames or sparks that can
cause ignition.
Do not smoke.
Do not spill fuel.
1.2.3 Machine-specific safety instructions for maintenance work
Introduction
The machine can pose residual risks during maintenance. To eliminate these risks, all
persons working on the machine must follow the general and machine-specific safety
instructions.
Maintenance intervals
Strictly adhere to the maintenance intervals.
Check the safety equipment regularly to ensure it is in good condition and functioning
properly.
Check connections, cables, and fasteners regularly to ensure they are in good condition.
Maintenance work
Maintenance work that goes beyond the scope described in the manual for diesel engine
must only be performed by qualified technicians. We recommend that you work with one of
the more than 500 HATZ service centers.
Replacing parts
When replacing defective components, we recommend that you use HATZ original spare
parts (see chapter General information, page 6).
When disposing of parts that can no longer be used, do so in accordance with local
environmental regulations or send them to a recycling center.
Measures following maintenance and troubleshooting
Securely reconnect loose electrical connections; check that the electrical components and
equipment are functioning properly.
Check the entire machine for foreign bodies; remove any foreign bodies.

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Safety instructions for maintenance work
DANGER
Danger of explosion from flammable cleaning agents.
Cleaning with benzene is an explosion hazard. It is highly
flammable, can become electrostatically charged, and can
generate an explosive gas/air mixture.
Use halogen-free, cold cleaners with a high flash point for
cleaning.
DANGER
Fire hazard from spontaneous combustion.
Cleaning materials soaked with cold cleaner may produce heat
together with atmospheric oxygen and combust spontaneously.
Collect cleaning materials soaked with cold cleaner only in fire-
proof, tightly sealed containers.
Do not dispose of cold cleaner residues and used cleaning
materials with domestic waste, rather only in accordance with
manufacturer instructions.
Comply with the instructions for preventing fire on the safety
data sheet for the cold cleaner.
WARNING
Danger of injury from compressed air and dust particles.
Eye injuries can occur when cleaning with compressed air.
Wear safety goggles.
CAUTION
Danger of injury from ignoring the maintenance instructions.
Only perform maintenance work when the engine is stopped.
Disconnect the negative battery terminal.
Protect the starting key from unauthorized access.
CAUTION
Danger of burns.
There is a danger of burns when working on a hot engine.
Let the engine cool before maintenance.

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1.2.4 Electrical equipment
Safety notes
DANGER
Danger to life, danger of injury or danger of property damage
due to incorrect use of batteries.
Do not place tools on the battery.
Before performing work on the electrical equipment, always
disconnect the negative battery terminal.
Never swap the positive (+) and negative (–) battery terminals.
When installing the battery, first connect the positive cable
and then the negative cable.
When removing the battery, first disconnect the negative
cable and then the positive cable.
It is imperative to prevent short circuits and mass contact of
current carrying cables.
If faults occur, check the cable connections for good contact.
DANGER
Danger of explosion from flammable cleaning agents.
There is a danger of explosion from flammable gases.
Keep batteries away from open flames and incendiary sparks.
Do not smoke when working with batteries.
CAUTION
Danger of chemical burns.
Chemical burns can occur when using batteries for the electrical
operation.
Protect your eyes, skin, and clothing from corrosive battery
acid.
Immediately rinse areas affected by splashed acid with clear
water and consult a physician if necessary.
CAUTION
Danger of damage to the machine from incorrect engine
cleaning.
Let the engine fully cool down before cleaning.
Do not use gasoline or acid-based cleaning agents.
The components of the electrical equipment are protected
against rain and spray water. Cleaning with a water jet is
permitted. When cleaning with a high pressure cleaner, ensure
a minimum distance of 100 cm between the high pressure
nozzle and engine parts. Otherwise, engine parts can be
damaged.

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NOTE
The necessary wiring diagrams are included with the machine
if it is equipped with electrical equipment. Additional wiring
diagrams can be requested when needed.
We cannot be held liable for electrical equipment that is not
designed according to HATZ wiring diagrams.
Promptly replace faulty indicator lamps.
Do not pull out the starting key during operation.
Do not disconnect the battery while the machine is running. Resulting voltage peaks could
destroy the electronic components.
When performing welding work on the machine, disconnect the battery and place the
ground clamp of the welding equipment as close as possible to the welding area.
Disconnect the plug-in connections to the voltage regulator.
1.3 Labels
Warning labels and information signs on the engine
Label
Meaning
The engine may only be operated with fuel
that is "EXTREMELY LOW IN SULFUR OR
SULFUR FREE".
NOTE
The "fuel label" must be positioned close to the fuel cap.
0000 053 657 02

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2. General information about the H50 engine
The H-series
Beginning with the water-cooled 4-cylinder 4H50TIC model, the new generation from Hatz
focuses on common rail technology, exhaust gas turbocharger with charge air cooling,
external exhaust gas recirculation (EGR) and diesel oxidation catalyst (DOC) or diesel
particulate filter (DPF) with diesel oxidation catalyst.
Top view of the H50
Maintenance side (operating side) Exhaust gas side
Available exhaust gas relevant engine
variations
Exhaust gas standard
With turbocharger and charge air cooler,
without EGR, without DOC, without DPF
EPA TIER 2
EU IIIa (<37 kW) / EU II (>37 kW)
With turbocharger and charge air cooler,
with EGR, with DOC, without DPF
EPA TIER 4 final / EU IIIb
With turbocharger and charge air cooler,
with EGR and DOC/DPF combination filter
EU V/EPA TIER 4 final
EGR
Exhaust gas recirculation
DOC
Diesel oxidation catalytic converter
DPF
Diesel particulate filter