CRE ATI NG POW ER SOL UTI ONS .
3-4L43C | 3-4M43 | 3-4M43Z
OPERATOR’S MANUAL
Diesel engine
Hatz Diesel
www.HATZ-DIESEL.com
3-4L43C, 3-4M43, 3-4M43Z Table of contents
Table of contents
1 Notices .................................................................................................................5
2 General information ............................................................................................ 6
3 Safety ................................................................................................................... 7
3.1 General information............................................................................................... 7
3.1.1 Intended use and foreseeable misuse .................................................................. 7
3.1.2 Machine user or machine manufacturer obligations ............................................. 8
3.1.3 Representation of safety notes ............................................................................. 9
3.1.4 Meaning of safety symbols.................................................................................. 10
3.2 Safety notes ........................................................................................................ 12
3.2.1 Operational safety ............................................................................................... 12
3.2.2 Machine-specific safety instructions for operation .............................................. 15
3.2.3 Machine-specific safety instructions for maintenance work ................................ 16
3.2.4 Electrical equipment............................................................................................ 18
3.3 Labels.................................................................................................................. 20
4 Technical data ................................................................................................... 21
4.1 Engine information and filling quantities.............................................................. 21
4.2 Engine type plate ................................................................................................ 22
4.3 Engine oil ............................................................................................................ 24
4.4 Fuel .....................................................................................................................25
5 Engine design.................................................................................................... 26
6 Transport, assembly and commissioning ...................................................... 30
6.1 Transport............................................................................................................. 30
6.2 Installation notes ................................................................................................. 31
6.3 Preparations for commissioning.......................................................................... 32
7 Operation and use............................................................................................. 33
7.1 Safety notes ........................................................................................................ 33
7.2 Performing tests .................................................................................................. 33
7.3 Start preparation ................................................................................................. 34
7.3.1 Pumping fuel with the manual fuel pump ............................................................ 34
7.4 Starting the engine .............................................................................................. 35
7.5 Switching off the engine ...................................................................................... 39
7.6 Refueling ............................................................................................................. 41
7.7 Checking the water separator ............................................................................. 42
7.8 Checking the oil level and adding oil if necessary............................................... 43
7.9 Regenerating the diesel particulate filter............................................................. 45
8 Maintenance ...................................................................................................... 48
8.1 General maintenance instructions....................................................................... 48
8.2 Maintenance work ............................................................................................... 49
8.2.1 Maintenance notice label .................................................................................... 49
HATZ
3Operator’s Manual
Table of contents 3-4L43C, 3-4M43, 3-4M43Z
8.2.2 Maintenance plan................................................................................................ 51
8.2.3 Checking the intake area of the combustion air .................................................. 53
8.2.4 Checking the cooling air area.............................................................................. 54
8.2.5 Change the engine oil. ........................................................................................ 55
8.2.6 Checking the poly v belt ...................................................................................... 57
8.2.7 Cleaning the cooling fan, cooling fins and oil cooler ........................................... 58
8.2.8 Checking the screw connections......................................................................... 62
8.2.9 Changing the fuel prefilter ................................................................................... 63
8.2.10 Maintaining the dry air filter ................................................................................. 65
8.2.11 Checking and cleaning the air filter cartridge ...................................................... 67
8.2.12 Checking and setting the tappet clearance ......................................................... 69
8.2.13 Changing the oil filter .......................................................................................... 72
8.2.14 Change the main fuel filter .................................................................................. 73
8.2.15 Renewing the poly v belt and checking the function of the switch-off unit .......... 76
8.2.16 Replacing the diesel particulate filter .................................................................. 79
8.2.17 Check the fuel evaporator (vaporizer) and clean if necessary. ........................... 81
8.2.18 Checking the exhaust gas back pressure sensor ............................................... 85
8.2.19 Resetting the maintenance interval indicator ...................................................... 86
9 Faults.................................................................................................................. 88
9.1 Trouble shooting ................................................................................................. 88
9.2 Flash code table for engine faults ....................................................................... 92
9.3 Flash code table for faults on the exhaust emission after-treatment system ...... 94
9.4 Flash code table for maintenance intervals......................................................... 98
10 Storage and disposal........................................................................................ 99
10.1 Storing the machine ............................................................................................ 99
10.2 Disposing of the machine.................................................................................. 101
11 Installation declaration ................................................................................... 102
4
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Notices
1 Notices
Contact data
© 2016
Motorenfabrik HATZ
Ernst-Hatz-Straße 16
94099 Ruhstorf
Germany
Tel. +49 (0)8531 319-0
Fax +49 (0)8531 319-418
marketing@hatz-diesel.de
www.hatz-diesel.com
All rights reserved!
Copyright
The copyright for this Operator's Manual rests entirely with Motorenfabrik
HATZ, Ruhstorf.
This Operator's Manual may only be copied or distributed if written approval
has been received. This also applies to the copying or distribution of excerpts of the Operator's Manual. The same conditions apply to distribution of
the Operator's Manual to third parties in digital form.
Original Operator's Manual
This Operator's Manual was translated into multiple languages.
The German version is the original Operator's Manual. All other language
versions are translations of the original Operator's Manual.
HATZ
5Operator’s Manual
General information 3-4L43C, 3-4M43, 3-4M43Z
2 General information
Information on the document
This Operator's Manual was created with due care. It is exclusively intended
to offer a technical description of the machine and to provide instructions on
commissioning, operating and maintaining the machine. When operating the
machine, the applicable standards and legal regulations as well as any inhouse regulations apply.
Before commissioning, during operation and before maintenance work is begun on the machine, read the Operator's Manual carefully and keep it close
by for ready access.
Machine
This Operator's Manual describes the following machine.
Machine name HATZ diesel engine
Type number 3-4L43C, 3-4M43, 3-4M43Z
Customer service
Have service work performed by qualified technicians only. We recommend
that you work with one of the over 500 HATZ service stations. Trained specialists there will repair your machine with Hatz original 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 the address of the Hatz ser-
vice station nearest you, please see the directory included or visit the internet at: www.hatz-diesel.com
Problems may occur if unsuitable spare parts have been installed. We cannot accept responsibility for damage and secondary damage that result from
this.
We therefore recommend the use of genuine Hatz original spare parts.
These parts are manufactured according to strict Hatz specifications and
achieve maximum operational reliability through their perfect fit and functionality. The order number can be found in the enclosed spare parts list or on
the internet at: www.hatz-diesel.com
Exclusion of liability
The manufacturer cannot be held responsible for personal injury, damage to
property, or damage to the machine itself caused by improper use, foreseeable misuse, or failure to follow or adequately follow the safety measures
and procedures described in this Operators Manual. This also applies to
changes made to the machine and the use of unsuitable spare parts.
Modifications, which serve technical improvement, are reserved.
6
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Safety
3 Safety
3.1 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 that these
safety instructions be followed.
Read this chapter carefully before beginning work.
3.1.1 Intended use and foreseeable misuse
Intended use
The machine described in this Operator's Manual fulfills the following functions:
▪ Diesel engine intended for installation in a machine or for assembly with
other machines to form a machine. See chapter 11 Installation declaration,
page 102.
This engine is intended exclusively for the purpose specified and tested by
the manufacturer of the machine into 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. Responsibility
is not accepted by Motorenfabrik HATZ for damage resulting from this situation.
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 this Operator's Manual.
HATZ
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 in this Operator's Manual.
▪ Failure to comply with the safety instructions.
▪ Failure to immediately eliminate malfunctions that impact safety before
continuing work with the machine (working with the machine when it is not
in perfect condition, either functionally or in terms of safety).
▪ 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 have not been
approved by HATZ.
▪ Operation in flammable or hazardous environments.
7Operator’s Manual
Safety 3-4L43C, 3-4M43, 3-4M43Z
▪ Operation in closed-off or poorly ventilated rooms.
▪ Installation of the machine in moving equipment (e.g. vehicles, trailers) or
in closed rooms without additional measures to handle supply air, extract
air, and exhaust gas.
▪ Improper operation at variance with DIN 6271 and DIN ISO 8528 (climate,
load, safety).
Residual risks
Residual risks result during daily use and in association with maintenance
work.
These residual risks will be pointed out in chapter 3.2.2 Machine-specific
safety instructions for operation, page 15 and in chapter 3.2.3 Machinespecific safety instructions for maintenance work, page 16 as well as in the
further contents of the manual, directly in front of the descriptions or operating instructions concerned.
3.1.2 Machine user or machine manufacturer obligations
Machine manufacturer obligations
If you have an engine that is not yet installed in a machine, it is imperative
that you follow the Assembly Instructions for HATZ Diesel Engines before installing the engine. These assembly instructions contain important information on how to safely install the engine and are available at your nearest HATZ service station.
It is prohibited to start the engine before it is fully installed.
In addition, please note that it is prohibited to start up the machine before it
has been determined that the machine into which this engine is installed fulfills all safety-related requirements and legal regulations.
User obligations
The user is obliged to operate the machine when it is in perfect condition
only. The user 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 user must
also ensure that all persons who work on the machine are familiar with the
contents of this Operators Manual.
Obligations of the operating and maintenance personnel
Personnel assigned with operating and maintaining the machine must have
read and understood the Operator's Manual 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.
8
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Safety
All work performed on the machine must be in compliance with the information provided in the Operator's Manual.
Storing the Operator's Manual
This Operator's Manual is an integral component of the machine (also when
being sold). It must be stored in the direct vicinity of the machine and be accessible to personnel at all times.
3.1.3 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 operating the machine and during maintenance work.
These risks are identified in this manual by means of safety notes.
The safety notes precede the related description or operating step.
Structure of the safety notes
The safety notes consist of:
▪ Danger symbol
▪ signal word
▪ Description of danger
▪ Possible consequences
▪ Preventative measures
HATZ
General danger symbol
The general danger symbol is used to identify the danger of personal injury.
9Operator’s Manual
Safety 3-4L43C, 3-4M43, 3-4M43Z
DANGER
WARNING
CAUTION
CAUTION
NOTICE
Signal words
Signal words identify the magnitude of the risk and the seriousness of the
possible injuries:
Danger symbol/
signal word
3.1.4 Meaning of safety symbols
Explanation of symbols
The following table describes the meanings of the safety symbols used in
this Operator's Manual.
Symbol Meaning
Smoking, fire, and open flames are prohibited!
Meaning
This signal word is used to indicate imminently
dangerous situations which, if not avoided, will
lead to serious injury or death.
This signal word is used to indicate potentially
dangerous situations which, if not avoided, may
lead to serious injury or death.
This signal word is used to indicate potentially
dangerous situations which, if not avoided, may
lead to minor or moderate injury.
This signal word, without a danger symbol, is
used to indicate the risk of property damage.
This signal word indicates additional useful information, such as operating tips and cross references.
10
Warning of personal injury!
Warning of hot surfaces!
Warning of flammable substances!
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Safety
i
Symbol Meaning
Warning of explosive substances!
Warning of toxic engine exhaust!
Warning of corrosive substances!
Warning of heavy loads!
Warning of environmental damage!
Comply with the Operator's Manual or additional documentation from other manufacturers or the user!
HATZ
Additional information that is useful to the reader.
11Operator’s Manual
Safety 3-4L43C, 3-4M43, 3-4M43Z
3.2 Safety notes
3.2.1 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 Operator's Manual and
the safety instructions contained therein.
▪ As the user of the machine, you must ensure that all people
working on the machine are familiar with the content of this
Operator's Manual.
▪ Before working on the machine, read this Operator's Manual
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.
12
Using the machine
▪ Only operate the machine for the purposes described in chapter 3.1.1 In-
tended use and foreseeable misuse, page 7.
Compliance with other regulations
▪ Adhere to the applicable accident prevention regulations of the trade asso-
ciations.
▪ Comply with the regulations concerning the minimum safety and health re-
quirements for the use of work equipment by workers at work.
▪ In addition, local safety, accident prevention and environmental regula-
tions 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 required
personal protective equipment is specified in the descriptions of the operating steps.
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Safety
Personal protective
Pictogram Function
equipment
Safety shoes Safety shoes offer protection
against:
▪ Slipping
▪ Falling objects
Hearing protection Hearing protection offers protec-
tion against ear injuries due to
excessive and constant noise.
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. How-
ever, it must not restrict the
wearer's freedom of movement.
Warning labels and information signs on the machine
The warning labels and information signs on the machine must be followed
(see chapter "Labels" 3.3 Labels, page 20).
The warning labels and information signs must be kept legible and must be
replaced if necessary. For this purpose, contact your nearest HATZ service
station.
HATZ
Maintenance work
Maintenance work that goes beyond the scope described in this manual
must only be performed by qualified technicians (see chapter 2 General in-
formation, 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.
13Operator’s Manual
Safety 3-4L43C, 3-4M43, 3-4M43Z
General safety instructions
DANGER
Danger to life and danger of injury due to failure to follow
the warnings on the machine and in the Operator's Manual.
▪ Heed the warnings on the machine and in the Operator's
Manual.
WARNING
Danger of injury and danger of incorrect operation due to
inadequate personnel qualifications.
▪ The personnel must have read and understood this Opera-
tor's Manual or must possess the qualifications necessary
for working with this equipment, acquired in training/instructional courses.
▪ Only qualified personnel is permitted to operate and main-
tain this machine.
▪ Failure to comply will cause the warranty to be void.
WARNING
14
Danger of injury from failure to follow the operating instructions and from performing unauthorized tasks on the machine.
▪ Follow all instructions.
▪ Do not perform activities for which no qualification is avail-
able. 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 injuries (of the back, for example).
▪ Only lift the machine with a hoist (see chapter 6.1 Transport,
page 30).
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Safety
3.2.2 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 for HATZ Diesel Engines 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.
▪ Parts of the exhaust gas system and the surface of the engine become hot
during operation. Risk of injury from touching hot parts! Let the engine cool
before maintenance.
▪ Do not refuel during operation.
HATZ
Faults
▪ Immediately eliminate faults that compromise safety.
▪ Switch off the machine and do not take into service again until all faults
have been eliminated.
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 machine in closed-off or poorly ventilated
rooms.
▪ Do not breathe in the exhaust gases.
15Operator’s Manual
Safety 3-4L43C, 3-4M43, 3-4M43Z
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.
DANGER
Danger of fire from hot exhaust gas system.
The exhaust gas system and, in particular, the diesel particulate
filter can become very hot. Combustible materials can ignite on
the exhaust gas system, even when the engine has already
been switched off.
▪ Keep combustible materials away from the exhaust gas sys-
tem.
▪ Do not operate and place the engine in the direct vicinity of
combustible materials.
3.2.3 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 this manual
must only be performed by qualified technicians. We recommend that you
work with one of the over 500 HATZ service stations.
16
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Safety
Replacing parts
▪ When replacing defective components, we recommend that you use gen-
uine HATZ original spare parts (see chapter 2 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.
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 flashpoint for
cleaning.
▪ Comply with manufacturer's instructions.
HATZ
WARNING
Danger of injury from compressed air and dust particles.
Eye injuries may occur when cleaning with compressed air.
▪ Wear safety goggles.
CAUTION
Danger of injury if maintenance instructions are not followed.
▪ Only perform maintenance when the engine is switched off.
▪ For engines with an electric starter:
Disconnect the negative battery terminal.
Protect the starting key against unauthorized access.
17Operator’s Manual
Safety 3-4L43C, 3-4M43, 3-4M43Z
CAUTION
Danger of burns.
There is a danger of burns when working on a hot engine.
▪ Let the engine cool before maintenance.
3.2.4 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 termi-
nals.
▪ 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 that you prevent short circuits and mass con-
tact of current-carrying cables.
▪ If faults occur, check the cable connections for good con-
tact.
18
DANGER
Danger of explosion from flammable substances.
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.
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Safety
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.
NOTICE
▪ The necessary wiring diagrams are included with the ma-
chine 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 disconnect the battery while the machine is running. Resulting volt-
age peaks could destroy the electronic components.
▪ When cleaning, do no spray the electrical equipment components with a
water jet or high pressure cleaner.
▪ 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 connection to the voltage regulator.
HATZ
19Operator’s Manual
Safety 3-4L43C, 3-4M43, 3-4M43Z
0,1 mm
0.004"
.L43
= 1h
250h
500h
Low SAPS
ACEA E6
ACEA E9
API CJ4
max
Low SAPS
ACEA E6
ACEA E9
API CJ4
max
OIL
.L43
.M43
max
OIL
Low SAPS
ACEA E6
ACEA E9
API CJ4
Nur low-SAPS
Öleverwenden!
Useonly
low-SAPSoil!
Utilisezquedes
huileslow-SAPS!
Utilizarsolamente
aceitelow-SAPSoil!
0000 043 129 00
0000 036 144
BIO
DIESEL
052 356 02
0000 053 657 02
3.3 Labels
Warning labels and information signs on the engine
Label Meaning
Maintenance instructions (see chapter 8.1 General maintenance instruc-
tions, page 48)
Only use engine oil with the relevant
specification (see chapter 4.3 En-
gine oil, page 24).
CAUTION!
Damage from inadequate engine
cooling.
▪ Only operate the engine when all
covers are installed.
20
Operator’s Manual
Refuel with diesel fuel only. For the
specification, see chapter 4.4 Fuel,
page 25
Do not use bio diesel.
The engine may only be operated
with fuel that is "EXTREMELY LOW
IN SULFUR OR SULFUR-FREE".
The fuel label is located close to the
fuel cap. If there is no fuel tank installed on the engine, the label must
be applied permanently close to the
fuel filler opening.
HATZ
3-4L43C, 3-4M43, 3-4M43Z Technical data
4 Technical data
4.1 Engine information and filling quantities
Type 3L43C, 3M43, 3M43Z 4L43C, 4M43, 4M43Z
Type Air cooled four stroke diesel engine
Combustion system Direct injection
Number of cylinders 3 4
Bore/stroke mm 102 / 105 102 / 105
Displacement cm
Engine oil pressure at oil
temperature of 100 ±
20°C
Engine oil consumption
(after running-in period)
Sense of rotation When viewing flywheel: left
Tappet clearance at 10 30 °C
inlet/outlet
Net weight
.M43
.M43Z
.L43C
Max. perm. inclination
during continuous operation in direction
Operating side
Air outlet side
Timing cover side
Flywheel side
Battery capacity Min/max 12V – 88/143Ah/24V – 55/110Ah
1)
Exceeding these limit values causes engine damage.
3
2574 3432
Min. 0.6 bar at 950 rpm
-1
Max. 1% of fuel consumption, pertaining to full load
mm 0.10 0.10
approx.
kg
With
oil sump
1)
30°
1)
30°
1)
25°
1)
22°
328
335
383
Without
oil sump
1)
25°
1)
30°
1)
25°
1)
25°
393
408
453
Only with
oil sump
1)
25°
1)
30°
1)
15°
1)
18°
HATZ
21Operator’s Manual
Technical data 3-4L43C, 3-4M43, 3-4M43Z
➀
➁
➂
➃
Engine oil capacities and dipstick equipment
Type Oil sump Engine oil capacity
3L43C
3M43
3M43Z
4L43C With 13.0 D
4M43 With 14.0 D
4M43Z With 13.0 D
2)
These values are approximations only. The max. mark on the dipstick is
decisive in any case (see chapter 7.8 Checking the oil level and adding oil if
necessary, page 43).
4.2 Engine type plate
2)
liters
With 10.5 D
Without 8.0 A
With 11.0 D
Without 8.5 A
With 10.5 D
Without 8.0 A
Code letter on the
dipstick
22
The engine type plate is located on the crankcase or noise reduction capsule
and contains the following engine information:
1 Number of the engine family or the EU approval (for engines with ex-
haust certificate only)
2 Engine type, customer specification and setting of pumping start (°
crankshaft before top dead center)
3 Engine serial number
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Technical data
4 Max. engine speed (rpm)
5 Model year
6 Displacement (liters) and inspection requirement for special settings
7 Injection pump effective stroke (mm) and engine capacity (kW)
8 "Constant speed only” (for engines with EPA/CARB exhaust certificate
only)
9 "Variable speed” (for engines with EPA/CARB exhaust certificate only)
The following data must always be specified for requests and spare part orders
2 Engine type and customer specification
3 Engine serial number
4 Max. engine speed (rpm)
HATZ
23Operator’s Manual
Technical data 3-4L43C, 3-4M43, 3-4M43Z
4.3 Engine oil
Oil quality
All brand name oils that satisfy at least the following specification are suitable:
▪ ACEA E6 (recommended)
▪ ACEA E9
▪ ACEA C3 / C4 (HTHS ≥ 3.5 mPas)
▪ API CJ-4
CAUTION
Damage to the catalytic converter and/or particulate filter
from using unsuitable engine oil.
Unsuitable engine oil diminishes the functionality and service life
of the catalytic converter and/or particulate filter.
Only use engine oils with very low quantities of sulfate ash,
phosphor and sulfur – so-called "low SAPS" oils which fulfill at
least one of the specifications mentioned above.
Oil viscosity
24
Select the recommended viscosity depending on the ambient temperature at
which the engine will be operated.
CAUTION
Engine damage from unsuitable engine oil.
Unsuitable engine oil considerably reduces engine service life.
Only use engine oil that fulfills the specifications stipulated
above.
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Technical data
4.4 Fuel
Fuel type
All types of diesel fuel that meet the minimum requirements of the following
specifications are suitable:
▪ Europe: EN 590
▪ UK: BS 2869 A1 / A2
▪ USA: ASTM D 975-09a 1-D S15 or 2-D S15
▪ Japan: JIS K 2204 (with a maximum HFRR value of 520 µm)
CAUTION
Danger of engine damage from low quality fuel.
The use of fuel that does not meet the specifications can lead to
engine damage.
▪ Only use fuel that is very low in sulfur or that contains no
sulfur at all.
▪ The use of fuel that does not meet specifications requires
approval by Motorenfabrik HATZ (main plant).
HATZ
25Operator’s Manual
Engine design 3-4L43C, 3-4M43, 3-4M43Z
1
2 3
4
5
6
7
8
9
10
11
16
17
18
12 13 14 15
19
20
21
22
23
24
25
5 Engine design
Engine 3-4L43C (sealed version - Silent Pack)
Pos. Designation
1 Air intake duct for capsule
2 Intake opening for combustion air and cooling air
26
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Engine design
Pos. Designation
3 Fuel filter
4 Powerbox
5 Retractable lifting eye, max. load 5000 N
6 Central connector for electrical equipment
7 Control unit for exhaust emission after-treatment
8 Oil filling opening and dipstick
9 Engine type plate
10 Oil filter
11 Cover plate on operating side
12 Fuel return line
13 Manual fuel pump
14 Fuel feed line with fuel prefilter
15 Battery connections
16 Engine mount
17 Oil drain screw
18 Drain screw on the water separator
19 Capsule hood
20 Air outlet duct for cooling air
21 Catalytic converter with diesel particulate filter
22 Air guide housing cover (access to the poly v belt)
23 Exhaust pipe
24 Cover plate on air outlet side
25 Fuel evaporator (vaporizer)
HATZ
27Operator’s Manual
Engine design 3-4L43C, 3-4M43, 3-4M43Z
15
1
2 3
4
5
6
7
8
9
10
11
12 13 14
16
17
18
19
20
21
22
24
25 26
23
Engine 3-4M43, 3-4M43Z (standard version)
28
Pos. Designation
1 Fuel filter
2 Powerbox
3 Central connector for electrical equipment
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Engine design
Pos. Designation
4 Air filter housing cover
5 Control unit for exhaust emission after-treatment
6 Oil filling opening and dipstick
7 Cooling air guide for oil cooler
8 Intake opening for combustion air
9 Side trim panel
10 Oil filter
11 Engine mount
12 Manual fuel pump
13 Fuel feed line with fuel prefilter
14 Battery connections
15 Oil drain screw (on oil sump)
16 Drain screw on the water separator
17 Fuel return line
18 Lifting eye, max. load 5000 N
19 Cylinder head cover
20 Catalytic converter with diesel particulate filter
21 1/2-inch square socket for turning the engine
22 Belt guard (access to the poly v belt)
23 Oil drain screw
24 Exhaust pipe
25 Engine type plate
26 Fuel evaporator (vaporizer)
HATZ
29Operator’s Manual
Transport, assembly and commissioning 3-4L43C, 3-4M43, 3-4M43Z
6 Transport, assembly and commissioning
6.1 Transport
Safety notes
WARNING
Danger of injury from improper lifting and transport.
Danger of crushing from falling or tipping of the engine.
▪ Only use the lifting eye already mounted on the machine for
lifting.
▪ Only use a suitable hoist with a sufficient carrying capacity.
▪ Do not remain under suspended loads.
CAUTION
Only use the lifting eye for transporting the engine.
Do not use for lifting the entire machine.
CAUTION
Danger of injury from overloading the body.
Lifting the machine to transport it or to move it to another location can lead to injuries (of the back, for example).
▪ Only lift the machine with a hoist.
30
NOTICE
Danger of environmental damage from leaking fluid.
If the machine is tilted, engine oil and fuel can run out.
▪ Only transport the machine in an upright position.
Transport conditions
▪ When transporting the machine, follow the safety instructions.
▪ When transporting, follow the applicable safety and accident prevention
regulations of the trade associations.
▪ After delivery, check the machine for completeness and transport damage.
▪ Only transport the machine when it is switched off and has cooled down.
▪ If you have questions on transporting the machine, please contact your
nearest HATZ service station. For contact data, see chapter 1 Impres-
sum, page 5 or www.hatz-diesel.com.
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Transport, assembly and commissioning
6.2 Installation notes
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.
The machine manufacturer must follow the applicable regulations regarding
machine safety – the engine is a part of a machine.
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. Note the following:
▪ Parts of the exhaust gas system and the engine surface become hot dur-
ing operation and may not be touched until they cool down after the engine is switched off.
▪ Incorrect cable connections and incorrect operation of the electrical equip-
ment can lead to sparking and must be avoided.
▪ After the engine is installed in the machine, rotating parts must be pro-
tected against contact.
HATZ safety equipment is available for the belt drive of the cooling fan and
alternator.
▪ Comply with all notices and warning labels on the engine and keep them
in a legible condition. If a label should become detached or be difficult to
read, it must be replaced promptly. For this purpose, contact your nearest
HATZ service station.
▪ Any improper modification of the engine results in a loss of liability cover-
age for resulting damage.
Only regular maintenance, as specified in this Operators Manual, will maintain the operating readiness of the engine.
The assembly instructions contain important information on how to safely
assemble the engine. They are available from any Hatz service station.
If you have any questions, please contact your nearest HATZ service sta-
tion before commissioning the engine.
HATZ
31Operator’s Manual
Transport, assembly and commissioning 3-4L43C, 3-4M43, 3-4M43Z
6.3 Preparations for commissioning
▪ Check the delivered parts for completeness, damage, and other noticeable
issues.
▪ Ensure that the setup location is adequately ventilated.
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 machine in closed-off or poorly ventilated
rooms.
▪ Do not breathe in the exhaust gases.
32
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Operation and use
7 Operation and use
7.1 Safety notes
NOTICE
Comply with the safety chapter!
Follow the basic safety instructions in chapter 3 Safety, page 7.
WARNING
Danger of injury from damage and defects on the machine.
▪ Do not take the machine into service if damage has been lo-
calized and identified.
▪ Replace faulty components.
WARNING
Danger of injury from failure to follow the operating instructions and from performing unauthorized tasks on the machine.
▪ Define the responsibilities of the personnel taking the ma-
chine into service.
▪ Replace faulty machine parts immediately.
▪ Check the installation conditions when the machine is first
taken into service and after the machine has been inactive
for a lengthy period.
7.2 Performing tests
Before starting
Before starting the engine, several tests need to be performed to ensure the
machine is working properly.
Procedure
Step Test
1 The machine is standing securely and on a level surface.
2 The installation location is adequately ventilated.
3 There is a sufficient amount of fuel in the fuel tank (see chapter
4 There is a sufficient amount of engine oil in the engine housing
HATZ
4.4 Fuel, page 25).
(see chapter 4.3 Engine oil, page 24).
33Operator’s Manual
Operation and use 3-4L43C, 3-4M43, 3-4M43Z
2
3
Step Test
6 No persons are located in the danger zone of the engine or ma-
chine.
7 All safety equipment is in place.
7.3 Start preparation
Procedure
Step Activity
1 Before the first start and with an empty fuel system:
▪ Pump the fuel with the manual fuel pump (see chapter 7.3.1
Pumping fuel with the manual fuel pump, page 34)
7.3.1 Pumping fuel with the manual fuel pump
Requirements
Pre-pumping of fuel with the manual fuel pump is necessary in the following
situations:
▪ Engine shuts down due to empty fuel tank
▪ at first filling of the fuel tank
▪ after changing the fuel filter
34
Overview
Pos. Designation
1 Bleed screw
2 Filter
3 Rubber ball
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Operation and use
Procedure
Step Activity
1 Fill with fuel if necessary.
2 Place a suitable container under the filter (2) to collect emerging
fuel.
3 Open the bleed screw (1) by approx. one turn.
4 Squeeze and release the rubber ball (3) repeatedly until fuel
emerges from the bleed screw (1).
5 Close the bleed screw (1) and then activate the rubber ball two
more times.
7.4 Starting the engine
The standard equipment of the engine is an electric start mechanism.
If possible, separate the engine from the machine being driven by uncoupling it. Always switch the machine into idle mode.
Safety notes
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 machine in closed-off or poorly ventilated
rooms.
▪ Do not breathe in the exhaust gases.
HATZ
CAUTION
Danger of engine damage from the use of starting fluid.
▪ Engine damage from the use of starting fluid can lead to un-
controlled ignition.
▪ Engine damage from uncontrolled ignition.
▪ Never use starting fluid.
NOTICE
See also starting instructions in the documentation for the complete machine.
35Operator’s Manual
Operation and use 3-4L43C, 3-4M43, 3-4M43Z
II
I
0
Overview — HATZ instrument boxes
1 Starting key
2 Pushbutton
3 Pre glow display
4 Operating display
5 Charge control
6 Oil pressure display
7 Air filter maintenance indicator (not activated)
8 Engine temperature display
9 Maintenance interval indicator
10 Engine fault
11 Fault in the area of the exhaust emission after-treatment system
12 Regeneration of the diesel particulate filter not possible
13 Regeneration of the diesel particulate filter is activated
14 Regeneration of the diesel particulate filter was suppressed
Ignition lock
0 Off
I Operation
II Start
Indicators
The function of all indicators is checked when the starting key is turned.
They flash or light up for different times. If there is a fault, the applicable indicator does not go out after the engine start or it lights up again during operation.
36
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Operation and use
Explanation of symbols
Symbol Meaning
Pre glow display
Lights at temperatures below 0°C. Start the engine when the
display has gone out.
NOTE:
After the start or during operation it is possible that the pre glow
display lights up for a short time. This is normal and no cause
for concern.
Operating display
Lights up during operation when there is no engine fault.
Charge control
Fault in the alternator or alternator charging circuit. The battery
is no longer charged. Eliminate the fault immediately.
Oil pressure display
Switch off the engine immediately! Danger of engine damage.
Check the oil level (see chapter 7.8 Checking the oil level and
adding oil if necessary, page 43).
Contact Hatz service if the oil level is correct.
Air filter maintenance indicator
(not activated)
NOTE:
A dirty air filter unit can be identified by the corresponding flashing signal in the indicator for "Fault in the area of the exhaust
emission after-treatment system".
Engine temperature display
Switch off the engine immediately! Danger of engine damage.
Engine temperature is impermissibly high.
For details of troubleshooting, see chapter 9.1 Trouble shooting,
page 88.
Maintenance interval indicator
This indicator flashes when maintenance work is necessary (see
chapter 9.4 Flash code table for maintenance intervals, page
98). After completion of maintenance work reset the maintenance interval indicator (see chapter 8.2.19 Resetting the main-
tenance interval indicator, page 86).
Engine fault
This indicator flashes when there are engine faults (see chapter
9.2 Flash code table for engine faults, page 92).
Switch off the engine immediately.
HATZ
37Operator’s Manual
Operation and use 3-4L43C, 3-4M43, 3-4M43Z
i
Symbol Meaning
Fault in the area of the exhaust emission after-treatment
system
A flashing signal indicates the type of fault (see chapter 9.3
Flash code table for faults on the exhaust emission after-treatment system, page 94).
Regeneration of the diesel particulate filter not possible
Exhaust gas temperature too low (see chapter 7.9 Regenerating
the diesel particulate filter, page 45).
Regeneration of the diesel particulate filter is activated
Lights up during regeneration.
The regeneration process is automatically started and takes approx. 15 minutes (see chapter 7.9 Regenerating the diesel par-
ticulate filter, page 45).
Regeneration of the diesel particulate filter was suppressed
(see chapter 7.9 Regenerating the diesel particulate filter, page
45).
Pushbutton
The pushbutton fulfills the following functions:
▪ Suppress regeneration of the diesel particulate filter.
When this button is pressed (maximum 2 seconds), a regeneration that was activated when the engine was running is
suppressed. Pressing the button again reactivates the regeneration (see chapter 7.9 Regenerating the diesel particulate
filter, page 45).
▪ Reset the maintenance interval indicator.
(see chapter 8.2.19 Resetting the maintenance interval indica-
tor, page 86).
38
Procedure
NOTICE
▪ Start for max. 30 seconds. If the engine is still not running
after that, turn the starting key back to position "0" and eliminate the cause (see chapter 9.1 Trouble shooting, page
88).
▪ Turn the starting key to position "0" every time you want to
start the engine.
▪ The anti repeat device in the ignition lock makes it impossi-
ble for the starter to engage while the engine is running and
become damaged.
Step Activity
1 Insert the starting key all the way and turn to position "I".
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Operation and use
i
i
Step Activity
2 When the pre glow display (3) lights up, wait until it goes out
then continue with step 3
3 Turn the starting key to position "II".
4 As soon as the engine is running, release the starting key.
▪ The starting key springs back to position "I" and remains in
this position during operation.
▪ The charge control (5) and oil pressure display (6) go out.
▪ The operating display(4) lights up.
NOTICE
▪ In case of irregularities, switch off the engine immediately.
▪ Identify the fault and eliminate it.
▪ For details of troubleshooting, see chapter 9.1 Trouble
shooting, page 88.
NOTICE
▪ If the engine stops again immediately after starting, or stops
independently during operation, this is an indication that a
monitoring element of the automatic shutoff has been activated.
▪ Remedy the fault before making further starting attempts
(see chapter 9.1 Trouble shooting, page 88).
▪ Despite the automatic switch-off, check the oil level every
8–15 operating hours (see chapter 7.8 Checking the oil level
and adding oil if necessary, page 43).
7.5 Switching off the engine
Safety note
Danger of injury from unauthorized access.
There is a danger of injury if unauthorized persons handle the
machine.
HATZ
CAUTION
▪ Protect the starting key against unauthorized access during
breaks in operation or after completing work.
39Operator’s Manual
Operation and use 3-4L43C, 3-4M43, 3-4M43Z
I
0
i
NOTICE
See also instructions in the documentation for the complete machine.
Overview — HATZ instrument boxes
Pos. Designation
1 Starting key
Ignition lock
0 Off
I Operation
40
Procedure
Step Activity
1 Turn the starting key (1) to position "0".
The engine switches off.
All indicator lamps go out.
2 Remove the starting key.
NOTICE
Danger of exhaustive battery discharge.
▪ When the machine is switched off, always turn the starting
key to position "0" or else the battery may become fully discharged.
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Operation and use
7.6 Refueling
This diesel engine is intended for installation in a machine or for assembly
with other machines to form a machine and does not have its own fuel tank.
Follow the instructions from the manufacturer and comply with the following
safety information.
Safety notes
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.
CAUTION
Danger of environmental damage from spilled fuel.
Do not overfill the fuel tank and do not spill fuel.
▪ Collect emerging fuel and dispose of it in an environmentally
compatible manner.
HATZ
CAUTION
Engine damage from using low quality fuel.
The use of fuel that does not meet the specifications can lead to
engine damage.
▪ Only use the fuel specified in chapter 4.4 Fuel, page 25.
▪ The use of fuel that does not meet specifications requires
approval by Motorenfabrik HATZ (main plant).
41Operator’s Manual
Operation and use 3-4L43C, 3-4M43, 3-4M43Z
i
7.7 Checking the water separator
Safety notes
CAUTION
Danger of environmental damage from spilled fuel.
When water is drained from the water separator, a small amount
of fuel is drained as well.
▪ Collect any escaped water/fuel mixture and dispose of it ac-
cording to local environmental regulations.
NOTICE
The interval for checking the water separator depends entirely
on the proportion of water in the fuel and on the care exercised
during refueling; the water separator should be checked at least
once a week.
Overview
Water in the fuel collects at the lowest point of the fuel filter in the water separator.
42
Pos. Designation
1 Drain plug
2 Bleed screw
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Operation and use
i
Procedure
Step Activity
1 Place a suitable container under the drain plug (1).
NOTE: In inaccessible locations, an extension hose can be
mounted on the drain screw (1).
2 Open the drain screw (1) and drain the water into the container.
3 If not enough liquid escapes, undo additional screw (2).
4 As soon as fuel escapes, close the drain plug (1) and screw (2).
NOTE: First water escapes then fuel. This can be seen by a
clear separator.
5 Dispose of the water/fuel mixture in accordance with the local
environmental regulations.
NOTICE
Note - If starting difficulties occur:
Bleed the injection system with the aid of the manual fuel pump
with the aid of the injection system (see chapter 7.3.1 Pumping
fuel with the manual fuel pump, page 34).
7.8 Checking the oil level and adding oil if necessary
HATZ
Safety notes
CAUTION
Danger of burns.
There is a danger of burns when working on a hot engine.
▪ Wear safety gloves.
CAUTION
Danger of injury
Prolonged contact with engine oil can lead to irritation of the
skin.
▪ Wear safety gloves.
▪ If there is contact with the skin, thoroughly wash the af-
fected areas of the skin with soap and water.
43Operator’s Manual
Operation and use 3-4L43C, 3-4M43, 3-4M43Z
CAUTION
Danger of later engine damage.
▪ Operating the engine with an oil level below the min. mark
or above the max. mark can lead to engine damage.
▪ When checking the oil level, the engine must be horizontal
and have been switched off for a few minutes.
Overview — Checking oil level/adding oil
Pos. Designation
1 Dipstick
2 Code letter on the dipstick
44
Procedure — Checking oil level/adding oil
Step Activity
1 Switch off the engine and wait several minutes for the engine oil
to collect in the crankcase. Engine must be level.
2 Remove contamination on the engine in the area of the dipstick
(1).
3 Pull out the dipstick and clean it.
4 Reinsert the dipstick.
5 Pull out the dipstick and check the oil level.
6 If the oil level is close to the min. mark, add engine oil to the
max. mark.
For the specification and viscosity, see chapter 4.3 Engine oil,
page 24.
7 Reinsert the dipstick.
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Operation and use
7.9 Regenerating the diesel particulate filter
The engine has an automatic regeneration process for cleaning the diesel
particulate filter (DPF).
The diesel particulate filter filters soot particles out of the exhaust gas. During regular regeneration the accumulated soot particles are burnt off at high
temperatures.
The regeneration process starts automatically and takes approx. 15 minutes.
In special situations, it can be suppressed using a pushbutton on the instrument box.
Safety notes
DANGER
Danger of fire from hot exhaust gas system.
The exhaust gas system and, in particular, the diesel particulate
filter can become very hot. Combustible materials can ignite on
the exhaust gas system, even when the engine has already
been switched off.
▪ Keep combustible materials away from the exhaust gas sys-
tem.
▪ Do not operate and place the engine in the direct vicinity of
combustible materials.
HATZ
CAUTION
Danger of damaging the diesel particulate filter.
If the regeneration of the diesel particulate filter is suppressed
over a longer period, a large amount of particles collects in the
filter. This can damage or destroy the diesel particulate filter.
▪ Only suppress regeneration when needed, and reactivate it
again as soon as possible.
45Operator’s Manual
Operation and use 3-4L43C, 3-4M43, 3-4M43Z
i
Overview — HATZ instrument boxes
Pos. Designation
1 Pushbutton
2 Indicator "Fault in the area of the exhaust emission after-treat-
ment system". For more information, see chapter 9.3 Flash code
table for faults on the exhaust emission after-treatment system,
page 94)
3 Indicator "Regeneration of the diesel particulate filter not possi-
ble"
4 Indicator "Regeneration of the diesel particulate filter is acti-
vated"
5 Indicator "Regeneration of the diesel particulate filter was sup-
pressed"
46
Procedure
NOTICE
▪ The full regeneration process of the diesel particulate filter
takes approx. 15 minutes.
▪ If the regeneration process is interrupted, (e.g. by pressing
the pushbutton or switching off the engine), it is automatically resumed the next time the engine is started and continues until regeneration is fully completed.
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Operation and use
Step Activity
Regeneration of the diesel particulate filter is activated
1 The regeneration process starts automatically and continues un-
noticed while the engine is running. The indicator (4) lights up.
Regeneration of the diesel particulate filter not possible
1 When the indicator (3) lights up the exhaust gas temperature is
too low. The regeneration process can not be started.
Remedy: Increase the engine load.
NOTE: The way the engine load is increased depends on the respective use of the engine.
If possible, do not reduce the engine load during the regeneration process.
Suppressing regeneration of the diesel particulate filter
1 If the regeneration process is to be suppressed for a the short
time, press the pushbutton (1) (maximum 2 seconds). The indicator (5) lights up. Pressing the button again reactivates the regeneration.
NOTE:
Switch back to the regular regeneration process as soon as possible.
HATZ
47Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
8 Maintenance
8.1 General maintenance instructions
Safety notes
WARNING
Danger of injury from failure to follow the operating instructions and from performing unauthorized tasks on the machine.
▪ Follow all instructions.
▪ Do not perform activities for which no qualification is avail-
able. Contact properly trained personnel if necessary.
NOTICE
Comply with the safety chapter!
Follow the basic safety instructions in chapter 3 Safety, page 7.
▪ Maintenance tasks may only be performed by trained personnel.
▪ Accident prevention measures must be in accordance with the local acci-
dent prevention regulations.
▪ Perform setting and maintenance work at the specified intervals.
▪ Replace faulty machine parts as soon as possible.
▪ Always use personal protective equipment.
▪ Only use fully functional tools.
▪ Problems may occur if unsuitable spare parts have been installed. We
cannot accept responsibility for damage and secondary damage that result
from this. We therefore recommend the use of genuine Hatz original
spare parts.
▪ Closely adhere to the maintenance conditions prescribed in this Operators
Manual.
▪ Only make changes on the machine in agreement with the manufacturer.
▪ Only perform maintenance when the engine is switched off.
▪ Protect start-up devices (crank handle, recoil start or starting key) from
unauthorized access.
▪ After completing maintenance work, check that all tools, bolts, aids, and
other objects are removed from the machine and that all safety equipment
has been replaced.
▪ Before starting, ensure that no persons are located in the danger zone of
the engine or machine.
48
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
i
▪ Adhere to legal regulations when handling and disposing of used oil, fil-
ters, and cleaning agents.
▪ For engines with an electric starter: Disconnect the negative battery termi-
nal before carrying out maintenance work.
Performance of maintenance work
The entire machine is designed to be maintenance friendly. Parts that require maintenance are easily accessible.
▪ Perform maintenance work faithfully at the specified intervals to prevent
premature wear of the machine.
▪ Follow the notice and warning labels on the machine.
▪ Always retighten screw connections loosened during maintenance work.
▪ After the necessary maintenance and repair work is completed, perform a
function test (test run).
▪ For maintenance work that is not listed and described in the maintenance
documentation, please contact your nearest HATZ service station.
8.2 Maintenance work
Safety note
CAUTION
Danger of injury if maintenance instructions are not followed.
▪ Only perform maintenance when the engine is switched off.
▪ Protect start-up devices (crank handle, recoil start or start-
ing key) from unauthorized access.
▪ For engines with a starter: Disconnect the negative battery
terminal.
▪ When the maintenance work has been completed, ensure
that all tools are removed from the machine.
8.2.1 Maintenance notice label
NOTICE
Depending on the engine type, one of the maintenance plans
shown below is supplied with the engine.
▪ It should be mounted on the engine or machine in a clearly
▪ The maintenance intervals specified on the maintenance
HATZ
visible location.
plan must be adhered to (see chapter 8.2.2 Maintenance
plan, page 51)
49Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
0000 042 956 01
max
0,1 mm
0.004"
.L43
= 1h
250h
500h
Low SAPS
ACEA E6
ACEA E9
API CJ4
max
Low SAPS
ACEA E6
ACEA E9
API CJ4
max
OIL
3-4M43, 3-4M43Z
3-4L43C
50
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
250h
8.2.2 Maintenance plan
In new and generally overhauled engines, after 25 operating hours:
▪ Change the engine oil
▪ Check the tappet clearance and adjust if necessary
▪ Check the screw connections (do not retighten the screws for attaching
the cylinder head)
In case of a low number of operating hours, change the engine oil no later
than every 12 months, regardless of the actual number of operating hours.
The degree of contamination of the fuel, the care with which refueling is performed and the soiling on the inside of the fuel tank are decisive in determining the change interval of the fuel prefilter and the fuel filter.
Symbol Maintenance in-
terval
Every 8–15 operating hours or every day before
starting
Weekly Check the water separator. 7.7 Checking the water
Every 250 operating hours
Maintenance activity/Check Chapter
Check the oil level. 7.8 Checking the oil
level and adding oil if
necessary, page 43
Check the intake area of the
combustion air.
Check the cooling air area. 8.2.4 Checking the
Change the engine oil
(3-4L43C).
Check the poly v belt. 8.2.6 Checking the poly
Clean the cooling fan, cooling
fins and oil cooler.
Check the screw connections. 8.2.8 Checking the
Check the fuel prefilter for
contamination and change if
necessary.
Reset the maintenance interval indicator.
8.2.3 Checking the intake area of the combustion air, page 53
cooling air area, page
54
separator, page 42
8.2.5 Change the engine oil., page 55
v belt, page 57
8.2.7 Cleaning the cooling fan, cooling fins and
oil cooler, page 58
screw connections,
page 62
8.2.9 Changing the fuel
prefilter, page 63
8.2.19 Resetting the
maintenance interval
indicator, page 86
HATZ
51Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
500h
Symbol Maintenance in-
terval
Every 500 operating hours
Every 1000 operating hours
Every 2000 operating hours
---
Every 3000 oper-
---
ating hours
Maintenance activity/Check Chapter
Change the fuel prefilter. 8.2.9 Changing the fuel
prefilter, page 63
Maintain the dry air filter.
Change the filter cartridge.
Check and set the tappet
clearance.
Change the engine oil (3-4M43
and 3-4M43Z).
Change the oil filter. 8.2.13 Changing the oil
Check the fuel evaporator (vaporizer).
Check the exhaust gas back
pressure sensor.
Reset the maintenance interval indicator.
Change the main fuel filter 8.2.14 Change the
Reset the maintenance interval indicator.
Renew the gaskets in the belt
tensioner or the complete belt
tensioner. (To be carried out
by a trained specialist).
Renew the poly v belt. 8.2.15 Renewing the
Clean the EGR valve, EGR
housing, and intake area.
(To be carried out by a trained
specialist).
8.2.10 Maintaining the
dry air filter, page 65
8.2.12 Checking and
setting the tappet clearance, page 69
8.2.5 Change the engine oil., page 55
filter, page 72
8.2.17 Check the fuel
evaporator (vaporizer)
and clean if necessary.,
page 81
8.2.18 Checking the exhaust gas back pressure sensor, page 85
8.2.19 Resetting the
maintenance interval
indicator, page 86
main fuel filter, page
73
8.2.19 Resetting the
maintenance interval
indicator, page 86
poly v belt and checking the function of the
switch-off unit, page
76
---
52
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
i
3
8.2.3 Checking the intake area of the combustion air
Safety notes
CAUTION
Danger of burns.
There is a danger of burns when working on a hot engine.
▪ Let the engine cool.
▪ Wear safety gloves.
NOTICE
In case of heavy contamination, shorten the maintenance intervals accordingly (see chapter 8.2.2 Maintenance plan, page 51).
Overview
3-4M43 and 3-4M43Z
Pos. Designation
1 Intake opening for combustion air
2 Dust outlet opening
3 Cyclone (option)
3-4L43C
HATZ
53Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
i
Procedure
Step Activity
1 Check the intake opening (1) for coarse contamination such as
leaves, heavy dust deposits, etc., and clean if necessary.
2 Check that the dust outlet opening (2) at the bottom of the cy-
clone precleaner is clear.
3 If the dirt contamination is oily, remover the cyclone (3) and
clean it.
8.2.4 Checking the cooling air area
Safety notes
CAUTION
Danger of burns.
There is a danger of burns when working on a hot engine.
▪ Let the engine cool before maintenance.
CAUTION
Danger of injury.
When working with compressed air, foreign bodies may fly into
your eyes.
▪ Wear safety goggles.
▪ Never direct the compressed air jet toward people or toward
yourself.
54
CAUTION
Danger of engine damage from overheating.
The engine temperature display (option) lights up as soon as the
engine becomes impermissibly hot.
▪ Switch off the engine immediately and eliminate the cause.
NOTICE
In case of heavy contamination, shorten the maintenance intervals accordingly (see chapter 8.2.2 Maintenance plan, page 51).
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
i
Procedure
Step Activity
1 Check the supply and exhaust air areas for coarse contamina-
tion such as leaves, heavy dust deposits, etc., and clean if
necessary (see chapter 8.2.7 Cleaning the cooling fan, cooling
fins and oil cooler, page 58).
8.2.5 Change the engine oil.
Safety notes
CAUTION
Danger of burns.
When working on the engine there is a danger of burns from hot
oil.
▪ Wear personal protective equipment (gloves).
▪ Collect the used oil and dispose of it according to local envi-
ronmental regulations.
NOTICE
▪ The engine must be level.
▪ The engine must be switched off.
▪ Only drain engine oil while it is warm.
HATZ
Overview — Draining the oil
3-4M43, 3-4M43Z
(standard version)
3-4L43C
(sealed version)
55Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
Pos. Designation
1 Oil drain screw
2 Drain pipe
Procedure — Draining the oil
Step Activity
1 Unscrew the oil drain screw (1) and drain the oil entirely.
In case of sealed engines, when unscrewing the oil drain
screw (1) ensure that the drain pipe (2) is not loosened. Hold it
with an open-end wrench.
2 Screw in the cleaned oil drain screw (1) with the new gasket
and tighten.
Overview — Checking oil level/adding oil
56
Pos. Designation
1 Dipstick
2 Code letter on the dipstick
Procedure — Adding oil
Step Activity
1 Add engine oil to the max. mark on the dipstick(1).
▪ For the specification and viscosity, see chapter 4.3 Engine
oil, page 24.
▪ The code letter on the dipstick (2) indicates whether the en-
gine is equipped with an oil sump or not (see chapter 4
Technical data, page 21).
2 Reinsert the dipstick (1).
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
Step Activity
3 After a short test run, check the oil level and correct it if neces-
sary (see the chapter 7.8 Checking the oil level and adding oil
if necessary, page 43).
8.2.6 Checking the poly v belt
Safety notes
CAUTION
Danger of burns.
There is a danger of burns when working on a hot engine.
▪ Let the engine cool before maintenance.
CAUTION
Damage from inadequate engine cooling.
Only operate the engine when all covers are installed.
Preparation
Step Activity
1 On encapsulated engines, unscrew the cover of the air guide
housing (see chapter 5 Engine design, page 26).
1 On engines without a capsule, unscrew the belt guard (see
chapter 5 Engine design, page 26).
HATZ
Overview
1 Belt tensioner
2 Poly v belt
57Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
Damage on the poly v belt
3 Transverse cracks on the rear
4 Fraying on the edges
5 Transverse cracks in multiple ribs
6 Broken ribs
Procedure
Step Activity
1 Check the belt tensioner (1) for leaks. If the belt tensioner is oily,
contact HATZ service.
2 Check the poly v belt (2) for the following damage:
▪ Transverse cracks on the rear of the belt.
▪ Fraying on the side.
▪ Accumulation of dirt between the ribs.
▪ Oily dirt contamination.
▪ Transverse cracks in multiple ribs.
▪ Broken ribs.
If one or more of these instances of damage are present, replace the poly v belt (see chapter 8.2.15 Renewing the poly v
belt and checking the function of the switch-off unit, page 76).
3 Refit the air guide housing cover and belt guard.
8.2.7 Cleaning the cooling fan, cooling fins and oil cooler
Safety notes
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 flashpoint for
cleaning.
▪ Comply with manufacturer's instructions.
58
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
i
CAUTION
Danger of burns.
There is a danger of burns when working on a hot engine.
▪ Let the engine cool before maintenance.
CAUTION
Danger of injury.
When working with compressed air, foreign bodies may fly into
your eyes.
▪ Wear safety goggles.
▪ Never direct the compressed air jet toward people or toward
yourself.
CAUTION
Danger of engine damage from overheating.
The engine temperature display (option) lights up as soon as the
engine becomes impermissibly hot.
▪ Switch off the engine immediately and eliminate the cause.
CAUTION
Danger of damage to the machine from incorrect engine
cleaning.
▪ Let the engine fully cool down before cleaning.
▪ Do not spray components of the electrical equipment with a
water jet or high pressure jet during cleaning.
▪ Do not use gasoline or acid-based cleaning agents.
HATZ
CAUTION
Damage from inadequate engine cooling.
Only operate the engine when all covers are installed.
NOTICE
In case of heavy contamination, shorten the maintenance intervals accordingly (see chapter 8.2.2 Maintenance plan, page 51).
59Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
Overview — Preparatory activities
Pos. Designation
1 Baffle plate
Preparation — Cleaning
Step Activity
1 On encapsulated engines unscrew the following:
(see chapter 5 Engine design, page 26)
▪ Hood
▪ Side panel
▪ Cover plate on operating side
▪ Air outlet duct for cooling air
▪ Cover plate on air outlet side
1 Remove the following on engines without a capsule:
▪ Side trim panel
▪ Cooling air guide for lubrication oil cooler
2 Unscrew the baffle plate (1)
60
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
Overview — Cleaning
Procedure — Cleaning
Step Activity
Cleaning in case of dry dirt contamination
1 Clean the cooling fan, cylinder head and cylinder with a suit-
able brush.
2 Blow out the entire cooling air area with compressed air.
3 Blow out the oil cooler with compressed air only.
NOTE:
▪ Do not place the compressed air gun against the sensitive
radiator fins.
4 On encapsulated engines, also clean the area between the
floor plate and crankcase.
5 Mount the capsule and air guide parts again.
Cleaning of wet or oily dirt contamination
1 Disconnect the negative battery terminal.
2 Manually clean the alternator and regulator.
3 Cover the alternator with the installed regulator and do not
spray directly.
4 Spray the entire area with a suitable cleaning solution accord-
ing to manufacturer instructions and then clean off with a jet of
water.
Do not spray components of the electrical equipment with a
water jet or high pressure jet during cleaning.
5 Blow dry the engine with compressed air.
HATZ
61Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
i
Step Activity
6 Determine the cause of the oil contamination and have leaks
corrected by the HATZ service station.
7 Mount the capsule and air guide parts again.
8 Let the engine run warm to prevent rust formation.
8.2.8 Checking the screw connections
Safety note
NOTICE
▪ Do not retighten the screws for attaching the cylinder head.
▪ The adjustment screws on the speed governor and the in-
jection system are secured with locking varnish and are not
permitted to be tightened or adjusted.
▪ Only retighten loose screw connections. Screw connections
can be secured with thread locking adhesive or tightened to
a defined torque. Retightening tight screw connections can
cause damage.
Procedure
Step Activity
1 Check the condition of all screw connections and ensure that
they are tight (for exceptions, see note).
2 Tighten any lose screw connections.
62
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
8.2.9 Changing the fuel prefilter
Safety notes
DANGER
Fire hazard from fuel.
Leaked or spilled fuel can ignite on hot engine parts and cause
serious burn injuries.
▪ Never refuel in the vicinity of open flames or sparks that can
cause ignition.
▪ Do not smoke.
▪ Do not spill fuel.
CAUTION
Danger of injury
Repeated contact with diesel fuel can cause chapped and
cracked skin.
▪ Wear safety gloves.
HATZ
CAUTION
Danger of environmental damage from spilled fuel.
When the filter is removed, a small amount of fuel is drained as
well.
▪ Collect any escaping fuel and dispose of it according to lo-
cal environmental regulations.
CAUTION
Dirt particles can damage the injection system.
▪ Maintain clean conditions to ensure dirt does not enter the
fuel line.
63Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
Overview
Pos. Designation
1 Fuel lines
2 Fuel prefilter
Procedure
Step Activity
1 Place a suitable container under the filter to collect emerging
fuel.
2 Close the fuel feed line.
3 Pull the fuel lines (1) off of the fuel prefilter (2) on both sides.
4 Dispose of the old filter in accordance with local environmental
regulations.
5 Insert a new fuel prefilter.
Note the following:
▪ Direction of arrow for the flow-through direction depends on
position of the fuel tank: HIGH or LOW
▪ Installation position/flow-through direction should be as verti-
cal as possible
6 Open the fuel feed line.
7 Perform a test run. While doing this, check the filter and lines
for leak-tightness.
8 If you have difficulties starting the engine, bleed the injection
system with the aid of the manual fuel pump (see chapter 7.3.1
Pumping fuel with the manual fuel pump, page 34).
64
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
i
8.2.10 Maintaining the dry air filter
NOTICE
▪ Clean the filter cartridge immediately if, at maximum speed,
the combined indicator on the instrument box flashes 14
times.
▪ The air filter cartridge either needs to be replaced, or
cleaned or checked depending on the degree of contamination.
▪ Renew the filter cartridge after a use period of 500 operating
hours.
▪ Four cylinder engines have two filter cartridges.
Overview — Removing the air filter cartridge (engines 3-4L43C)
HATZ
Pos. Designation
1 Screw
2 Cover
3 Filter cartridge
4 Air filter housing
5 Spacer
6 Bushing
7 Clamp
Procedure — Removing the air filter cartridge (engines 3-4L43C)
Step Activity
1 Remove the capsule hood.
2 Remove adherent dirt in the area of the air filter housing (4).
65Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
Step Activity
3 Only loosen the screws (1) to the point where you can lift off
the complete air filter housing (4).
4 Cover the opening in the intake pipe to prevent ingress of dirt
and other foreign bodies.
5 On three cylinder engines, open the clamp (7).
▪ On three cylinder engines, the cover (2) is additionally held
by a clamp (7).
6 Open the air filter housing (4).
7 Take out the filter cartridge (3).
8 Clean the air filter housing (4) and cover (2).
9 Renew the bushing (6) if the spacer (5) is loose.
▪ The spacer (5) is connected with the screw (1) by the elastic
bushing (6) to ensure that it cannot fall into the intake pipe
during disassembly and assembly.
Overview — Removing the air filter cartridge (engines 3-4M43 and 3-4M43Z)
66
Pos. Designation
1 Clamp
2 Air filter housing cover
3 Screw
4 Filter cover
5 Spacer
6 Bushing
7 Filter cartridge
8 Air filter housing
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
i
Procedure — Removing the air filter cartridge (engines 3-4M43 and 3-4M43Z)
Step Activity
1 Release the clamps (1) and remove the cover of the air filter
housing (2).
2 Remove adherent dirt in the air filter area.
3 Only loosen the screws (3) to the point where the filter cover
(4) can be removed with the filter cartridge (7).
4 Cover the opening in the intake pipe to prevent ingress of dirt
and other foreign bodies.
5 Clean the air filter housing cover (2), filter cover (4) and air fil-
ter housing (8).
6 Renew the bushing (6) if the spacer (5) is loose.
▪ The spacer (5) is connected with the screw (3) by the elastic
bushing (6) to ensure that it cannot fall into the intake pipe
during disassembly and assembly.
8.2.11 Checking and cleaning the air filter cartridge
Safety notes
CAUTION
HATZ
Danger of injury.
When working with compressed air, foreign bodies may fly into
your eyes.
▪ Wear safety goggles.
▪ Never direct the compressed air jet toward people or toward
yourself.
NOTICE
▪ The pressure must not exceed 5bar.
▪ A distance of approx. 150mm must be maintained between
the filter cartridge and the compressed air gun.
▪ Even minor damage in the areas of the sealing surface, filter
paper or filter cartridge makes it impossible to reuse the filter cartridge.
67Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
Overview — Checking/cleaning the air filter cartridge
Pos. Designation
1 Sealing surface
Step Activity
Dry contamination
1 Blow out the filter cartridge with dry compressed air from the in-
side to the outside until dust no longer emerges.
2 Check the sealing surfaces (2) of the filter cartridge for damage.
3 Check the filter cartridge for cracks in the filter paper and other
damage by holding it against the light at a slant or letting light
from a lamp shine through it.
4 Replace the filter cartridge if necessary (see note).
Moist or oily contamination
1 Renew the filter cartridge.
68
Procedure — Mounting the air filter cartridge
Step Activity
1 When assembling, mount the parts individually one after the
other to make sure they are correctly seated and to ensure leak
tightness.
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
8.2.12 Checking and setting the tappet clearance
Safety notes
CAUTION
Danger of burns.
There is a danger of burns when working on a hot engine. Only
perform the settings while the engine is cold (10-30°C).
▪ Let the engine cool.
CAUTION
Damage from inadequate engine cooling.
Only operate the engine when all covers are installed.
Overview — Preparatory activities
HATZ
Pos. Designation
1 Square opening
2 Hex nut
3 Cylinder head cover
Preparation — Adjusting the tappet clearance
Step Activity
1 On encapsulated engines, remove the hood of the capsule (see
chapter 5 Engine design, page 26).
2 Remove the hex nut (2) and remove the cylinder head cover (3).
3 Remove the air guide housing cover (see chapter 5 Engine de-
sign, page 26) and belt guard.
69Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
i
1
2
3
4
1 2 3 45678
Step Activity
4 Insert the ratchet or T-piece 1/2" with the required extension (1)
into the square opening.
NOTICE
Turn the engine in the sense of rotation.
Anti-clockwise in both cases - flywheel side or timing cover side.
Numbering of the valves and cylinders from the fan side
Setting method for three and four cylinder engines
70
Type Valve no.... fully
opened
3-cylinder
4-cylinder
Operator’s Manual
Check the valves of
the ... cylinder
1
5
3
1
5
7
3
3rd cylinder
2nd cylinder
1st cylinder
3rd cylinder
4th cylinder
2nd cylinder
1st cylinder
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
Overview — Adjusting the tappet clearance
Pos. Designation
1 Hex nut
2 Adjusting screw
3 Feeler gauge
Procedure — Adjusting the tappet clearance
Step Activity
1 Check the tappet clearance with the feeler gauge (3). For the
setting, see the chapter 4 Technical data, page 21
2 If the tappet clearance needs to be corrected:
▪ Release the hex nut (1).
▪ Turn the adjustment screw (2) so the feeler gauge (3) can be
pulled through with a barely perceptible resistance after the
hex nut (1) is tightened again.
3 Repeat the above procedure for the entire valve area, taking
special care to use the described adjustment method.
4 Mount the cylinder head cover again:
▪ Always renew the gaskets.
▪ Use the fixing nuts for the cylinder head cover no more than
twice before renewing them.
▪ Tightening torque: 10 Nm.
5 Mount all covers.
NOTE:
▪ Under no circumstances is the engine permitted to be oper-
ated if not all covers are mounted.
HATZ
71Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
Step Activity
6 After a brief trial run, check the cylinder head cover for tight-
ness.
8.2.13 Changing the oil filter
Safety note
CAUTION
Danger of burns.
When working on the engine there is a danger of burns from hot
oil.
▪ Wear personal protective equipment (gloves).
▪ Collect the used oil and dispose of it according to local envi-
ronmental regulations.
Overview
72
1 Oil filter
2 Strap wrench
3 Gasket
Procedure
Step Activity
1 Release the oil filter (1) with a strap wrench (2) and quickly un-
screw it or pull it out.
▪ HATZ order no. for strap wrench: 620 307 01.
2 Dispose of the old filter in accordance with local environmental
regulations.
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
Step Activity
3 Wipe spilled engine oil out of the oil baffle.
4 Lightly oil the gasket (3) of the new oil filter.
5 Screw in the oil filter and tighten it by hand.
6 Add engine oil to the max. mark on the dipstick.
▪ For the specification and viscosity, see chapter 4.3 Engine oil,
page 24.
▪ The mark on the dipstick indicates whether the engine is
equipped with an oil sump or not (see chapter 4.1 Engine in-
formation and filling quantities, page 22).
7 Reinsert the dipstick.
8 Check the oil level after a short test run and correct if necessary.
9 Check the oil filter for tightness and retighten by hand if neces-
sary.
8.2.14 Change the main fuel filter
Safety notes
DANGER
HATZ
Fire hazard from fuel
Leaked or spilled fuel can ignite on hot engine parts and cause
serious burn injuries.
▪ Do not spill fuel.
▪ No open flames when working on the fuel system.
▪ Do not smoke.
CAUTION
Danger of injury
Repeated contact with diesel fuel can cause chapped and
cracked skin.
▪ Wear safety gloves.
73Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
CAUTION
Danger of environmental damage from spilled fuel.
When the filter is removed, a small amount of fuel is drained as
well.
▪ Collect any escaping fuel and dispose of it according to lo-
cal environmental regulations.
CAUTION
Dirt particles can damage the injection system.
▪ Maintain clean conditions to ensure dirt does not enter the
fuel line.
▪ Only install fuel filters dry and do not prefill in order to avoid
contamination.
Overview — Preparatory activities
74
Pos. Designation
1 Drain plug
Preparation — Changing the fuel filter
Step Activity
1 Close the fuel lines on the filter housing.
2 Place a suitable container under the filter to collect emerging
fuel.
3 Release the drain screw (1) and drain the fuel.
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
Overview — Changing the fuel filter
Pos. Designation
1 Strap wrench (HATZ order no.: 620 307 01)
2 Gasket
Procedure — Changing the fuel filter
Step Activity
1 Slide on the strap wrench (1) and unscrew the fuel filter counter-
clockwise.
2 Dispose of the old filter in accordance with local environmental
regulations.
3 Lightly oil the gasket (2) of the new fuel filter.
4 Mount the fuel filter and tighten it by hand.
5 Open the fuel feed line.
6 Bleed the injection system with the aid of the manual fuel pump
with the aid of the injection system (see chapter 7.3.1 Pumping
fuel with the manual fuel pump, page 34).
7 After a brief trial run, check the fuel filter for leak tightness and
retighten by hand.
HATZ
75Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
i
8.2.15 Renewing the poly v belt and checking the function of the switch-off
unit
Safety note
NOTICE
When changing the belt:
▪ Always check the function of the switch-off unit. The switch-
off pin must emerge by spring force, or else the machine will
not switch off automatically if the belt tears.
▪ If the grooves are broken off or bent, renew the damaged
pulley.
Overview — Removing the poly v belt
76
Pos. Designation
1 Cylinder screw
2 Tension pulley
3 Pulley
Procedure — Removing the poly v belt
Step Activity
1 Unscrew one cylinder screw (1) from the pulley (3).
2 Push back the tension pulley (2) and lock it using the cylinder
screw (1).
3 Unscrew the pulley (3).
4 Check the pulley (3) for broken or bent grooves.
5 Remove the poly v belt.
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
Overview — Checking the function of the switch-off unit of the belt monitoring system
Pos. Designation
1 Tension pulley
2 Angle lever
3 Switch-off pin
Procedure — Checking the function of the switch-off unit of the belt monitoring system
Step Activity
1 Release the piston with the tension pulley (1) by removing the
cylinder screw.
▪ The piston with the tension pulley is pushed out of the housing
by spring pressure.
▪ The angle lever (2) turns downward and releases the switch-
off pin(3).
▪ The switch-off pin (3) must emerge by spring force, or else the
machine will not switch off automatically if the belt tears.
2 If there is no reaction, please contact the nearest HATZ service
station.
HATZ
77Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
Overview — Mounting the poly v belt
Pos. Designation
1 Switch-off pin
2 Tension pulley
3 Housing
Procedure — Mounting the poly v belt
Step Activity
1 Slide in the switch-off pin (1).
2 Slide the piston with the tension pulley (2) into the housing (3)
and lock it using the cylinder screw.
3 Position the poly v belt centrally on the pulley of the fan wheel,
the tension pulley (2) and the pulley at the bottom.
78
Overview — Centering the pulley
Pos. Designation
1 Cylinder screw
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
Pos. Designation
2 Square opening
Procedure — Centering the pulley
Step Activity
1 Lightly secure the pulley with a cylinder screw (1) without plac-
ing the pulley fully on the centering.
2 Insert the ratchet or T-piece 1/2" with the required extension into
the square opening (2).
3 Turn the pulley until a further cylinder screw can be fitted.
4 Insert the remaining cylinder screws and tighten all screws.
8.2.16 Replacing the diesel particulate filter
Safety notes
CAUTION
Danger of burns.
During the regeneration process, the diesel particulate filter and
the exhaust system become very hot. There is a danger of burns
when working on a hot exhaust system.
▪ Let the diesel particulate filter and exhaust system cool
down.
▪ Wear safety gloves.
HATZ
CAUTION
Damage of the diesel particulate filter from improper cleaning.
▪ Do not spray the filter fabric of the diesel particulate filter
with a water jet or high pressure jet.
▪ Do not use gasoline or chemical cleaning agents.
▪ Do not burn the filter fabric of the diesel particulate filter free
of soot.
79Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
i
182 3
4
9
7
5
6
NOTICE
▪ The diesel particulate filter must be conditioned/replaced
when the indicator lamp for "Fault in the area of the exhaust
emission after-treatment system" flashes 2 times for a long
time (see Explanation of symbols, chapter 7.4 Starting the
engine, page 35).
▪ The conditioning of the diesel particulate filter must be car-
ried out by a specialized company. In order to ensure shutdown periods as short as possible, the "Hatz EasyClean"
exchange program is recommended.
Overview
80
Pos. Designation
1 Diesel particulate filter
2 Differential pressure line
3 Cap nut
4 Discharge funnel
5 V-band clamp (discharge funnel)
6 Retaining foot clamp
7 V-band clamp (diesel particulate filter)
8 Cord packing
9 Sealing dome
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
Procedure
Step Activity
1 Undo the cap nut (3) of the differential pressure line. Carefully
pull off the differential pressure line, take care with the sealing
dome (9).
2 Loosen the V-band clamp (5) of the discharge funnel, remove
the discharge funnel (4) from the diesel particulate filter.
3 Loosen the V-band clamp (7) of the diesel particulate filter.
4 Loosen the retaining foot clamp (6) and remove the diesel par-
ticulate filter (1).
5 Remove the cord packings (8) from the diesel particulate filter.
6 Fit new cord packings on the new/conditioned diesel particu-
late filter.
7 Reinstall the diesel particulate filter, discharge funnel and dif-
ferential pressure line in reverse order.
NOTE:
The installation direction of the diesel particulate filter is determined by the design.
Only tighten the retaining foot clamp fully at the end.
8.2.17 Check the fuel evaporator (vaporizer) and clean if necessary.
HATZ
Safety notes
DANGER
Danger of explosion due to fuel mist.
There is a danger of explosion from the fuel-air mixture.
▪ Do not clean the fuel evaporator in the vicinity of open
flames and hot surfaces.
▪ Do not smoke when cleaning the fuel evaporator.
CAUTION
Danger of burns.
During the regeneration process, the diesel particulate filter and
the exhaust system become very hot. There is a danger of burns
when working on a hot exhaust system.
▪ Let the diesel particulate filter and exhaust system cool
down.
▪ Wear safety gloves.
81Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
0
0
8
8
1 2
5
3
86 7
9
4
CAUTION
Danger of injury.
When working with compressed air, foreign bodies may fly into
your eyes.
▪ Wear safety goggles.
▪ Never direct the compressed air jet toward people or toward
yourself.
CAUTION
Damage to the coiled filament from wire brush.
▪ Clean the coiled filament only with a soft copper or brass
wire brush.
▪ Do not use a hard steel wire brush.
Overview — Removing the fuel evaporator (vaporizer)
82
Pos. Designation
1 Electrical connection cable
2 Evaporator unit fixing screws
3 Gasket
4 Exhaust pipe
5 Fuel hose
6 Hex nut
7 Coiled filament
8 Evaporator housing
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
4
1 3
2
Pos. Designation
9 Copper ring
Procedure — Removing the fuel evaporator
Step Activity
1 Disconnect the electrical connection cable (1) by loosening the
connector fasteners.
2 Loosen the fuel hose clamp (5) and pull off the fuel hose.
3 Loosen the evaporator unit mounting bolts (2).
4 Carefully slacken the evaporator unit, the gasket (3) should not
be damaged. The gasket can be reused if it remains undamaged.
5 Remove the complete evaporator unit from the exhaust pipe
(6).
6 Screw the coiled filament (7) out of the evaporator housing (8)
by using the hex net (6), remove the copper ring (9).
Overview — Checking and cleaning the fuel evaporator (vaporizer)
HATZ
Pos. Designation
1 Copper or brass wire brush
2 Coiled filament
3 Fuel line connection
4 Fuel holes
83Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
Procedure — Checking the fuel evaporator (vaporizer)
Step Activity
1 Check the coiled filament for soot deposits and clean if neces-
sary (see section "Cleaning the fuel evaporator (vaporizer)").
2 Visually check the coiled filament for damage. If damage is vis-
ible, replace the coiled filament.
3 Blow out the fuel line connection (3) with compressed air.
Cover the fuel holes (4) in the evaporator housing with a cloth
when doing this to collect deposits and fuel splashes. If the fuel
holes are clogged, clean the evaporator housing (see section
"Cleaning the fuel evaporator (vaporizer)").
Procedure — Cleaning the fuel evaporator
Step Activity
1 Brush off soot deposits from the coiled filament (2) with a cop-
per or brass wire brush (1).
2 Use a wire to carefully remove hard soot and carbon deposits
from the fuel holes (4). Then blow out the fuel line connection
again.
Procedure — Installing the fuel evaporator (vaporizer)
84
Step Activity
1 Replace the copper ring (9), screw the coiled filament back into
the evaporator housing, tightening torque 55 Nm.
2 Screw the evaporator unit tightly onto the exhaust pipe.
Undamaged gaskets may still be used, replace the gasket if
damage is visible.
3 Connect the fuel hose and secure with the clamp.
4 Reconnect the electrical connection cable.
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
1
2
3
8.2.18 Checking the exhaust gas back pressure sensor
Safety notes
CAUTION
Danger of burns.
There is a danger of burns when working on a hot engine.
▪ Let the engine cool.
▪ Wear safety gloves.
CAUTION
Damage to the exhaust gas back pressure sensor by cleaning.
The exhaust gas back pressure sensor is destroyed by cleaning
in the majority of cases. The correct operation of the sensor can
not be easily checked. The exhaust gas back pressure sensor
must therefore always be replaced when it is sooted up.
HATZ
Overview
Pos. Designation
1 Signal line with connector
2 Exhaust gas back pressure sensor
3 Line connection
85Operator’s Manual
Maintenance 3-4L43C, 3-4M43, 3-4M43Z
I
0
Procedure
Step Activity
1 Disconnect the signal line (1) from the exhaust gas back pres-
sure sensor (2) by loosening the connector fastener.
2 Unscrew the line connection (3) and remove the exhaust gas
back pressure sensor.
3 Check the bore hole for the exhaust gas back pressure sensor.
When the bore hole is blocked with soot, the exhaust gas back
pressure sensor must be replaced.
4 Refit the exhaust gas back pressure sensor and reconnect the
signal line.
8.2.19 Resetting the maintenance interval indicator
After completion of maintenance work reset the maintenance interval indicator. The counter starts again at zero and indicates when the next service is
due.
Overview — HATZ instrument boxes
86
1 Starting key
2 Pushbutton
Ignition lock
0 Off
I Operation
Procedure
Step Activity
1 The starting key is at position "0".
▪ Press and hold down the button (2).
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Maintenance
Step Activity
2 Turn the starting key from position "0" to position "I".
3 Release the button (2) after a wait time of at least 5 seconds but
no longer than 10 seconds. The maintenance interval indicator
is now reset.
NOTICE
If a HATZ instrument box is not used:
Comply with the instructions in the documentation for the complete machine.
HATZ
87Operator’s Manual
Faults 3-4L43C, 3-4M43, 3-4M43Z
9 Faults
9.1 Trouble shooting
General troubleshooting notes
If the cases listed below have been worked through but the fault continues to
persist, please contact your nearest Hatz service station.
The engine does not start or does not start immediately, but it can be turned
with the starter.
Possible causes Remedy Chapter
No fuel at the injection
pump.
Injection nozzle is not
functional.
Poly v belt torn. Renew the poly v-belt. 8.2.6 Checking
Insufficient compression:
▪ Wrong tappet clear-
ance.
▪ Cylinder and/or pis-
ton ring wear.
Refuel. 7.6 Refueling,
page 41
Operate the manual fuel pump. 7.3.1 Pumping
fuel with the
manual fuel
pump, page 34
Systematically check the entire fuel supply. If
this does not yield results:
▪ Check the feed line to the
engine.
▪ Check the fuel prefilter. 8.2.9 Changing
the fuel prefilter,
page 63
▪ Check the main fuel filter. 8.2.14 Change
the main fuel filter, page 73
▪ Check the function of the
feed pump.
Contact Hatz service.
the poly v belt,
page 57
Check the tappet clearance
and adjust if necessary.
Contact Hatz service.
8.2.12 Checking
and setting the
tappet clearance,
page 69
88
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Faults
For low temperatures (engine does not start)
Possible causes Remedy Chapter
Faulty pre glow sys-
Contact Hatz service.
tem.
Fuel gelled due to insufficient cold resistance.
Check whether the fuel that
emerges from the fuel feed line
is clear and not cloudy. If the
fuel has gelled, either warm the
engine or drain the entire fuel
supply system. Fill with a temperature-resistant fuel mixture.
4.4 Fuel, page 25
8.2.9 Changing
the fuel prefilter,
page 63
8.2.14 Change
the main fuel filter, page 73
Oil is too viscous and
causes a too low
starter speed.
Change the engine oil and oil
filter.
Add engine oil with a suitable
8.2.5 Change the
engine oil., page
55
viscosity class.
Insufficiently charged
battery.
Check the battery and contact
the service center if necessary.
3.2.4 Electrical
equipment, page
18
Machine is not uncoupled.
If possible, separate the engine
from the machine by uncoupling it.
HATZ
The starter does not switch on and the engine does not turn.
Possible causes Remedy Chapter
Irregularities in the electrical equipment:
Battery and/or other
cable connections are
incorrectly connected.
Check the electrical equipment
and its components or contact
Hatz service.
Cable connections are
loose and/or oxidized.
Battery is faulty and/or
not loaded.
Faulty starter.
Faulty relay, monitoring elements, etc.
3.2.4 Electrical
equipment, page
18
89Operator’s Manual
Faults 3-4L43C, 3-4M43, 3-4M43Z
The engine starts, but does not continue running after the starter is
switched off.
Possible causes Remedy Chapter
Machine is not uncoupled.
If possible, separate the engine
from the machine by uncoupling it.
Fuel prefilter is
clogged.
Change the fuel prefilter. 8.2.9 Changing
the fuel prefilter,
page 63
Main fuel filter is
clogged.
Change the main fuel filter 8.2.14 Change
the main fuel filter, page 73
Fuel supply is interrupted.
Systematically check the entire
fuel supply.
Stop signal from monitoring elements that are associated with the automatic switch-off (optional):
▪ No oil pressure. Check the oil level. 7.8 Checking the
oil level and
adding oil if necessary, page 43
▪ Faulty three phase
Contact Hatz service.
alternator.
90
Engine switches off spontaneously during operation.
Possible causes Remedy Chapter
The tank ran out of fuel
during operation.
Fuel prefilter or main
fuel filter is clogged.
Fill with fuel. 7.6 Refueling,
page 41
Change the fuel filter. 8.2.9 Changing
the fuel prefilter,
page 63
8.2.14 Change
the main fuel filter, page 73
Poly v belt torn. Renew the poly v-belt. 8.2.15 Renewing
the poly v belt
and checking the
function of the
switch-off unit,
page 76
Mechanical faults. Contact Hatz service.
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Faults
With automatic electrical switch-off mechanism (option)
Possible causes Remedy Chapter
Stop signal of monitoring elements for:
▪ Oil pressure too low. Check the oil level. 7.8 Checking the
oil level and
adding oil if necessary, page 43
▪ Engine temperature
too high.
Check the cooling air guides
for contamination or other impairments.
8.2.7 Cleaning
the cooling fan,
cooling fins and
oil cooler, page
58
Irregularities in the electrical equipment:
▪ Loose contacts on
cable connections.
▪ Faulty three phase
Check the electrical equipment
and its components, contacting
the service center if necessary.
3.2.4 Electrical
equipment, page
18
alternator.
▪ Faulty relay.
The engine loses power and speed.
Possible causes Remedy Chapter
Dirty air filter unit. Check the degree of dirt con-
tamination of the air filter, and
clean or renew it if necessary.
Tappet clearance not
Adjust the tappet clearance. 8.2.12 Checking
OK.
8.2.10 Maintaining the dry air filter, page 65
and setting the
tappet clearance,
page 69
Injection nozzle not
Contact Hatz service.
OK.
Fault in the area of the
exhaust emission aftertreatment system.
Note the flashing signal and
eliminate the fault as shown in
the flash code table.
9.3 Flash code
table for faults on
the exhaust
emission aftertreatment system, page 94
The fuel supply is impaired:
▪ The tank ran out of
fuel during operation.
Add fuel. 7.6 Refueling,
page 41
HATZ
91Operator’s Manual
Faults 3-4L43C, 3-4M43, 3-4M43Z
Possible causes Remedy Chapter
▪ Fuel prefilter or main
fuel filter is clogged.
▪ Inadequate tank
venting.
▪ Line connections are
not leak tight.
Engine becomes very hot. Indicator lamp for engine temperature (option)
lights up.
Possible causes Remedy Chapter
Too much engine oil in
the engine.
Inadequate cooling:
▪ Contamination in the
entire area of the
cooling air guides.
▪ Incompletely closed
air guide parts or
capsule parts.
Change the fuel filter. 8.2.9 Changing
the fuel prefilter,
page 63
8.2.14 Change
the main fuel filter, page 73
Ensure that the tank is sufficiently vented.
Check the line screw connections for leak tightness.
Drain the engine oil to the upper mark of the dipstick.
Clean the cooling air area. 8.2.7 Cleaning
Check the air guide parts and
shafts for completeness and
good sealing properties.
7.8 Checking the
oil level and
adding oil if necessary, page 43
the cooling fan,
cooling fins and
oil cooler, page
58
9.2 Flash code table for engine faults
When engine faults occur, a flashing signal is shown on the indicator lamp
for "Engine fault" (see Explanation of symbols, chapter 7.4 Starting the en-
gine, page 35). The table below shows possible flashing signals, their meaning, as well as measures for remedies.
If the listed fault cases have been worked through but the fault continues to
persist, please contact your nearest HATZ service.
92
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Faults
Flash signal
Flashing – Break
1 – 1
Area affected:
Engine oil pressure
2 – 1
Area affected:
Engine temperature
3 – 1
Area affected:
Charge control
4 – 1 or
6 – 1
Area affected:
Powered machine
8 – 1
Area affected:
Engine speed
Possible causes Remedy Chapter
Engine oil level too
low.
Check the oil level. 7.8 Check-
ing the oil
level and
adding oil if
necessary,
page 43
Too much engine
oil in the engine.
Drain the engine oil
to the max mark on
the dipstick.
Inadequate cooling:
Contamination of
the cooling air
guides or another
impairment of the
cooling system.
Clean the cooling
air area.
8.2.7 Cleaning the cooling fan,
cooling fins
and oil
cooler, page
58
Incompletely
closed air guide
parts or capsule
parts.
Check the air guide
parts and shafts for
completeness and
good sealing properties.
Faulty charging cir-
Check the cabling.
cuit cabling.
Loose contacts on
Check the cabling.
cable connections.
Faulty three phase
alternator.
Fault signal from
the powered machine.
Engine speed too
high:
Contact Hatz service.
See the documentation for the complete machine.
Contact Hatz service.
▪ Faulty electronic
speed governor.
HATZ
93Operator’s Manual
Faults 3-4L43C, 3-4M43, 3-4M43Z
9.3 Flash code table for faults on the exhaust emission after-treatment
system
When there are faults on the diesel particulate filter or exhaust gas return
system, a flashing signal is shown on the indicator lamp for "Fault in the area
of the exhaust emission after-treatment system" (see Explanation of sym-
bols, chapter 7.4 Starting the engine, page 35). A dirty air filter unit is also indicated by a flashing signal. The table below shows possible flashing signals, their meaning, as well as action for remedies.
If the listed fault cases have been worked through but the fault continues to
persist, please contact your nearest HATZ service.
Flash signal
Flashing – Break
1 – 1
Area affected:
Exhaust gas recirculation (EGR)
3 – 1
Area affected:
Pressure ratios in
the diesel particulate filter (DPF)
4 – 1
Area affected:
High current relay
(HCR)
Possible causes Remedy Chapter
Faulty cabling to
the EGR sensor.
Malfunction in the
EGR valve.
DPF not leak tight. Check the DPF for
Faulty differential
pressure sensor.
Leak or clogging in
the differential
pressure line.
Cabling loose or
faulty.
Faulty high current
relay.
Faulty coiled filament in the fuel
evaporator.
Faulty fuse. Renew the fuse.
Check the cabling.
Contact Hatz service.
leaks
Contact Hatz service.
Check the differential pressure line.
Check the cabling.
Contact Hatz service.
Replace the coiled
filament.
8.2.17
Check the
fuel evaporator (vaporizer) and
clean if necessary.,
page 81
94
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Faults
Flash signal
Flashing – Break
5 – 1
Area affected:
Fuel pump to the
fuel evaporator
6 – 1
Area affected:
Sensors for the
diesel particulate
filter (DPF)
7 – 1
Area affected:
Electronic speed
control
Possible causes Remedy Chapter
Cabling loose or
Check the cabling.
faulty.
Faulty fuel pump. Contact Hatz ser-
vice.
Cabling loose or
Check the cabling.
faulty
One or multiple
sensors faulty:
Contact Hatz service.
▪ Exhaust gas
back pressure
sensor.
▪ Differential pres-
sure sensor.
▪ Temperature
sensors on the
diesel oxidation
catalytic converter (DOC).
Faulty speed sensor.
Faulty electronic
speed governor.
Contact Hatz service.
Contact Hatz service.
HATZ
8 – 1
Area affected:
Sensors for intake air
9 – 1
Area affected:
Oil temperature
sensor
Cabling loose or
faulty.
Faulty intake temperature sensor or
intake vacuum
sensor.
Cabling loose or
faulty.
Faulty oil temperature sensor.
Check the cabling.
Contact Hatz service.
Check the cabling.
Contact Hatz service.
95Operator’s Manual
Faults 3-4L43C, 3-4M43, 3-4M43Z
Flash signal
Flashing – Break
10 – 1
Area affected:
Control unit for
diesel particulate
filter (DPF)
12 – 1
Area affected:
Control unit communication
14 – 1
Area affected:
Air filter-maintenance display
15 – 1
Area affected:
Coding plug
16 – 1
Area affected:
Engine emergency running
program
Possible causes Remedy Chapter
Power supply to
the unit outside the
permissible range.
Possible faults on:
▪ Cabling
▪ Battery
▪ Three phase al-
ternator
Faulty control unit. Contact Hatz ser-
vice.
Faulty communication to different
control units.
Check the cabling,
contact
HATZ service if required.
Dirty air filter unit. Service the air fil-
ter.
8.2.10 Maintaining the
dry air filter,
page 65
Coding plug is
missing or faulty.
Coding plug is not
suitable for the
data set of the control unit for the
Install or replace
the coding plug.
Install a correct
coding plug, contact HATZ service
if required.
diesel particulate
filter.
Engine is in the
emergency running
Contact Hatz ser-
vice.
program.
96
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Faults
Flash signal
Flashing – Break
1 long – 1
Area affected:
Regeneration of
the diesel particulate filter (first
warning level)
2 long – 1
Area affected:
Regeneration of
the diesel particulate filter (second
warning level)
Possible causes Remedy Chapter
Diesel particulate filter is strongly loaded with soot
particles.
▪ Regeneration
process has
been suppressed
for a long time.
▪ Regeneration
process has
been interrupted
several times by
engine stops.
Activate the regen-
eration process
(see Explanation of
symbols).
If permitted by the
working environ-
ment, do not switch
off the engine dur-
ing the regenera-
7.4 Starting
the engine,
page 35
tion process.
▪ Operation of the
fuel evaporator
impaired.
Check the fuel
evaporator (vapor-
izer).
8.2.17
Check the
fuel evaporator (vaporizer) and
clean if necessary.,
page 81
The diesel particulate filter is blocked
and must be conditioned.
Have the diesel
particulate filter ex-
changed and pro-
fessionally condi-
tioned as part of
8.2.16 Replacing the
diesel particulate filter, page 79
the Hatz Easy-
Clean program.
HATZ
97Operator’s Manual
Faults 3-4L43C, 3-4M43, 3-4M43Z
9.4 Flash code table for maintenance intervals
When a maintenance interval is reached, the maintenance interval indicator
flashes on the instrument box (see Explanation of symbols, chapter 7.4
Starting the engine, page 35).
The table below shows possible flashing signals and their meaning. The corresponding maintenance activities are described in chapter 8.2.2 Mainte-
nance plan, page 51.
Flash signal
Flashing – Break
1 – 1
2 – 1 ●
3 – 1 ● ●
4 – 1 ●
5 – 1 ● ●
6 – 1 ● ●
7 – 1 ● ● ●
Maintenance interval / Operating hours (h)
250 500 1000
●
98
Operator’s Manual
HATZ
3-4L43C, 3-4M43, 3-4M43Z Storage and disposal
10 Storage and disposal
10.1 Storing the machine
Safety notes
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 machine 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.
HATZ
CAUTION
Danger of environmental damage from spilled fuel.
Do not overfill the fuel tank and do not spill fuel.
▪ Collect emerging fuel and dispose of it in an environmentally
compatible manner.
NOTICE
Comply with the safety chapter!
Follow the basic safety instructions in chapter 3 Safety, page 7.
99Operator’s Manual
Storage and disposal 3-4L43C, 3-4M43, 3-4M43Z
Storing the machine for a lengthy period
Take the following measures if you intend to take the machine out of service
for a lengthy period (3-12 months):
Step Activity
1 Drain the fuel tank until it is nearly empty and fill with FAME*-
free fuel. Operate the engine for a few minutes so that only
FAME-free fuel is still in the fuel system.
2 Change the engine oil and oil filter (see chapters 8.2.5 Change
the engine oil., page 55and 8.2.13 Changing the oil filter, page
72).
3 Change the fuel filter (see chapter 8.2.14 Change the main fuel
filter, page 73).
4 Let the machine cool down.
5 Remove the battery in accordance with the machine operators
manual and store at ambient temperature. Comply with the local
regulations as well as the regulations of the battery manufacturer for the storage of batteries.
6 Close and seal all engine openings (air intake openings, air out-
let openings and the exhaust gas opening) so that no foreign
bodies can enter, but a small amount of air can still be exchanged. This avoids condensation.
7 After the machine has cooled down, cover it to protect it against
dust and store it in a dry and clean place.
100
*FAME = Fatty Acid Methyl Ester
Ambient conditions during storage
▪ Max. permissible storage temperature: -25 °C to +60 °C
▪ Max. permissible humidity: 70%
▪ Protect the engine from direct sunlight
Operator’s Manual
HATZ
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