Hatz M Series User Manual (English)

Questions and Answers:

A
amber94Aug 13, 2025
What to do if my Hatz M Series Engine does not start immediately?
- B
  Benjamin JohnsonAug 13, 2025
  If your Hatz Engine won't start immediately but can be turned, several issues could be the cause. First, there might be no fuel reaching the injection pump. Try to refuel, operate the manual fuel pump, and check the feed line, fuel prefilter, main fuel filter, and feed pump function. Other potential causes include a torn poly v-belt (renew it) or insufficient compression due to wrong tappet clearance (check and adjust). If the injection nozzle is not functional or there is cylinder/piston ring wear, contact Hatz service.
R
Richard MarshallAug 16, 2025
Why is my Hatz M Series Engine losing power and speed?
- J
  John HudsonAug 16, 2025
  If your Hatz Engine is losing power and speed, several factors could be responsible. Check the air filter for dirt and clean or replace it if needed. Adjust the tappet clearance if it's not correct. Ensure the fuel supply is adequate by adding fuel if the tank is empty, changing the fuel filter if it's clogged, ensuring proper tank venting, and checking for leaks in line connections. If there is a fault in the exhaust emission after-treatment system, note the flashing signal and address the fault using the flash code table. For injection nozzle issues, contact Hatz service.
K
Kimberly CardenasAug 20, 2025
How to start Hatz Engine in cold weather?
- M
  marquezanthonyAug 20, 2025
  If your Hatz Engine won't start in low temperatures, the issue could stem from a faulty pre glow system (contact Hatz service), fuel gelled due to insufficient cold resistance (check if the fuel emerging from the fuel feed line is clear; if gelled, warm the engine or drain/refill with temperature-resistant fuel), oil that's too viscous causing low starter speed (change the engine oil and filter, using a suitable viscosity), an insufficiently charged battery (check the battery and contact the service center if needed), or the machine not being uncoupled (separate the engine if possible).
P
Peggy DavisAug 23, 2025
Why does my Hatz M Series overheat?
- A
  amanda81Aug 25, 2025
  If your Hatz Engine becomes very hot and the temperature indicator lamp lights up, it could be due to several reasons. There might be too much engine oil, in which case you should drain it to the upper mark of the dipstick. Another cause could be inadequate cooling due to contamination in the cooling air guides, so clean the cooling air area. Also, check the air guide parts and shafts for completeness and good sealing properties, as incompletely closed parts can cause overheating.
A
Angela BakerAug 28, 2025
What to do if Hatz M Series Engine switches off spontaneously?
- D
  Dennis WellsAug 28, 2025
  If your Hatz Engine switches off spontaneously, it could be due to several reasons. The tank may have run out of fuel, so fill it up. The fuel prefilter or main fuel filter might be clogged, so change the fuel filter. A torn poly v-belt could also be the cause, so renew it. If the issue persists, there may be mechanical faults, in which case you should contact Hatz service.
E
Edward JohnsonAug 31, 2025
Why does my Hatz M Series Engine shut off with the automatic electrical switch-off mechanism?
- K
  Kayla HaleAug 31, 2025
  If your Hatz Engine has an automatic electrical switch-off mechanism and it's activating, it could be due to low oil pressure (check the oil level), or high engine temperature (check the cooling air guides for contamination). Irregularities in the electrical equipment, such as loose contacts on cable connections, can also trigger this; check the electrical equipment and its components, contacting the service center if necessary.
D
douglasjeffreySep 3, 2025
What to do if Hatz M Series Engine starts then stops?
- T
  tiffany62Sep 4, 2025
  If your Hatz Engine starts but doesn't continue running after the starter is switched off, it could be due to several reasons. The machine may not be uncoupled, so separate the engine if possible. The fuel prefilter or main fuel filter could be clogged, so change them. The fuel supply might be interrupted, so systematically check the entire fuel supply. If there's a stop signal from monitoring elements due to no oil pressure, check the oil level. For a faulty three-phase alternator, contact Hatz service.
M
Melanie EdwardsSep 7, 2025
Why won't the starter switch on for my Hatz M Series Engine?
- K
  Kyle JeffersonSep 8, 2025
  If the starter of your Hatz Engine doesn't switch on and the engine doesn't turn, it could be due to irregularities in the electrical equipment. Specifically, the battery and/or other cable connections may be incorrectly connected. Check the electrical equipment and its components, or contact Hatz service.

Hatz M Series Specifications

General

Brand	Hatz
Model	M Series
Category	Engine
Language	English

Summary

1 Notices

Contact Data and Copyright

Manufacturer's contact details, copyright information, and manual language details.

2 General Information

Document and Machine Overview

Details about the manual's purpose, scope, and the engine models it covers.

Customer Service and Liability

Information on service stations, spare parts, and manufacturer's liability exclusion.

3 Safety

3.1 General Safety Information

Covers intended use, misuse, obligations, signal words, and safety symbols.

3.2 Operational Safety

Instructions for safe operation, PPE, and regulations.

3.3 Machine-Specific Safety

Instructions for operation and maintenance specific to the engine.

3.4 Electrical Equipment Safety

Safety notes for batteries, wiring, and electrical components.

3.5 Warning Labels and Signs

Explanation and importance of engine labels and warning signs.

4 Technical Data

Engine Specifications and Filling Quantities

Details on bore, displacement, oil capacity, net weight, and capacities.

Engine Type Plate Information

Explanation of data found on the engine's identification plate.

Engine Oil Requirements

Specifications for suitable engine oil quality and viscosity.

Fuel Specifications

Approved fuel types and standards for diesel engines.

5 Engine Design

3-4L43C Engine Components

Diagram and identification of parts for the 3-4L43C engine.

3-4M43/3-4M43Z Engine Components

Diagram and identification of parts for the 3-4M43/3-4M43Z engines.

6 Transport, Assembly, and Commissioning

6.1 Safe Transport Procedures

Guidelines and safety notes for lifting and transporting the engine.

6.2 Installation Notes

Important considerations and safety measures for engine installation.

6.3 Preparations for Commissioning

Steps to take before starting the engine for the first time.

7 Operation and Use

7.1 Operational Safety Notes

Essential safety warnings for operating the engine.

7.2 Pre-Start Performance Tests

Checks to ensure the machine is ready for operation.

7.3 Engine Start Preparation

Steps for preparing the engine before starting, including fuel priming.

7.4 Starting the Engine Safely

Procedure for starting the engine, instrument box overview, and indicators.

7.5 Switching Off the Engine

Correct procedure for shutting down the engine.

7.6 Refueling Guidelines

Safety notes and procedures for refueling the engine.

7.7 Checking the Water Separator

Procedure for draining water from the fuel system's separator.

7.8 Checking and Adding Engine Oil

Procedure for monitoring and topping up engine oil levels.

7.9 Diesel Particulate Filter Regeneration

Explanation and management of the DPF regeneration process.

8 Maintenance

8.1 General Maintenance Instructions

Fundamental rules and safety precautions for maintenance tasks.

8.2 Maintenance Work Procedures

Details on various maintenance tasks and service intervals.

8.2.1 Maintenance Notice Label

Guidance on the maintenance schedule label.

8.2.2 Comprehensive Maintenance Plan

Schedule of maintenance activities based on operating hours.

8.2.3 Checking Combustion Air Intake

Procedure for inspecting the engine's air intake area.

8.2.4 Checking Cooling Air Area

Procedure for inspecting the engine's cooling air passages.

8.2.5 Engine Oil Change

Steps for draining oil, checking level, and replacing the oil filter.

8.2.6 Checking the Poly V-Belt

Procedure for inspecting the poly V-belt for wear and damage.

8.2.7 Cleaning Cooling System Components

Instructions for cleaning the fan, fins, and oil cooler.

8.2.8 Checking Screw Connections

Procedure for inspecting and tightening engine fasteners.

8.2.9 Changing the Fuel Prefilter

Steps for replacing the engine's fuel prefilter.

8.2.10 Maintaining the Dry Air Filter

Procedure for cleaning or replacing air filter cartridges.

8.2.11 Checking and Cleaning Air Filter Cartridge

Detailed steps for inspecting and cleaning air filter elements.

8.2.12 Tappet Clearance Adjustment

Procedure for checking and adjusting valve tappet clearances.

8.2.13 Changing the Oil Filter

Steps for replacing the engine oil filter.

8.2.14 Changing the Main Fuel Filter

Steps for replacing the primary fuel filter.

8.2.15 Poly V-Belt Renew and Switch-off Unit Check

Procedure for belt replacement and switch-off function test.

8.2.16 Diesel Particulate Filter Replacement

Steps for replacing the DPF unit.

8.2.17 Fuel Evaporator Check and Cleaning

Procedure for inspecting and cleaning the fuel evaporator.

8.2.18 Exhaust Gas Back Pressure Sensor Check

Procedure for inspecting the exhaust gas pressure sensor.

8.2.19 Resetting Maintenance Interval Indicator

Steps to reset the service reminder on the instrument box.

9 Faults

9.1 Troubleshooting Guide

General troubleshooting notes and common engine starting issues.

Starting Problems Troubleshooting

Specific issues and remedies for engine starting difficulties.

Starter Issues Troubleshooting

Troubleshooting for problems with the starter motor not engaging.

Engine Stopping After Start Troubleshooting

Resolving issues where the engine stops after the starter disengages.

Spontaneous Engine Shutdown Troubleshooting

Diagnosing and fixing reasons for unexpected engine shutdowns.

Automatic Shutdown Troubleshooting

Addressing faults related to automatic electrical switch-off.

Engine Power Loss Troubleshooting

Identifying and resolving causes of reduced engine power.

Engine Overheating Troubleshooting

Addressing issues causing the engine to become excessively hot.

9.2 Engine Fault Flash Codes

Table of flash codes indicating engine faults and their remedies.

9.3 Exhaust Emission System Flash Codes

Table of flash codes for DPF and EGR system faults.

9.4 Maintenance Interval Flash Codes

Table showing flash codes for reaching maintenance intervals.

10 Storage and Disposal

10.1 Storing the Machine

Safety notes and procedures for storing the engine.

Long-Term Storage Procedures

Detailed steps for taking the machine out of service for extended periods.

Machine Recommissioning

Steps to prepare the engine for use after storage.

10.2 Machine Disposal

Information and regulations for the safe disposal of the engine.

11 Installation Declaration

EC Machinery Directive Declaration

Manufacturer's declaration of conformity with safety and health requirements.

Manufacturer and Compliance Details

Information on the manufacturer and adherence to directives and standards.

Related product manuals

Hatz M Series User Manual

Table of Contents

Questions and Answers:

Hatz M Series Specifications

Summary

1 Notices

Contact Data and Copyright

2 General Information

Document and Machine Overview

Customer Service and Liability

3 Safety

3.1 General Safety Information

3.2 Operational Safety

3.3 Machine-Specific Safety

3.4 Electrical Equipment Safety

3.5 Warning Labels and Signs

4 Technical Data

Engine Specifications and Filling Quantities

Engine Type Plate Information

Engine Oil Requirements

Fuel Specifications

5 Engine Design

3-4L43C Engine Components

3-4M43/3-4M43Z Engine Components

6 Transport, Assembly, and Commissioning

6.1 Safe Transport Procedures

6.2 Installation Notes

6.3 Preparations for Commissioning

7 Operation and Use

7.1 Operational Safety Notes

7.2 Pre-Start Performance Tests

7.3 Engine Start Preparation

7.4 Starting the Engine Safely

7.5 Switching Off the Engine

7.6 Refueling Guidelines

7.7 Checking the Water Separator

7.8 Checking and Adding Engine Oil

7.9 Diesel Particulate Filter Regeneration

8 Maintenance

8.1 General Maintenance Instructions

8.2 Maintenance Work Procedures

8.2.1 Maintenance Notice Label

8.2.2 Comprehensive Maintenance Plan

8.2.3 Checking Combustion Air Intake

8.2.4 Checking Cooling Air Area

8.2.5 Engine Oil Change

8.2.6 Checking the Poly V-Belt

8.2.7 Cleaning Cooling System Components

8.2.8 Checking Screw Connections

8.2.9 Changing the Fuel Prefilter

8.2.10 Maintaining the Dry Air Filter

8.2.11 Checking and Cleaning Air Filter Cartridge

8.2.12 Tappet Clearance Adjustment

8.2.13 Changing the Oil Filter

8.2.14 Changing the Main Fuel Filter

8.2.15 Poly V-Belt Renew and Switch-off Unit Check

8.2.16 Diesel Particulate Filter Replacement

8.2.17 Fuel Evaporator Check and Cleaning

8.2.18 Exhaust Gas Back Pressure Sensor Check

8.2.19 Resetting Maintenance Interval Indicator

9 Faults

9.1 Troubleshooting Guide

Starting Problems Troubleshooting

Starter Issues Troubleshooting

Engine Stopping After Start Troubleshooting

Spontaneous Engine Shutdown Troubleshooting

Automatic Shutdown Troubleshooting

Engine Power Loss Troubleshooting

Engine Overheating Troubleshooting

9.2 Engine Fault Flash Codes

9.3 Exhaust Emission System Flash Codes

9.4 Maintenance Interval Flash Codes

10 Storage and Disposal

10.1 Storing the Machine

Long-Term Storage Procedures

Machine Recommissioning

10.2 Machine Disposal

11 Installation Declaration

EC Machinery Directive Declaration

Manufacturer and Compliance Details