Hatz 3H50 Series User Manual

Hatz 3H50 Series

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CREATING POWER SOLUTIONS.

MANUAL

for diesel engine

Hatz Diesel

3H50 | 4H50

www.hatz-diesel.com

Table of Contents

Questions and Answers:

E
ericgomezAug 13, 2025
What to do if Hatz 3H50 Engine does not start immediately?
- J
  James OlsonAug 13, 2025
  If your Hatz Engine doesn't start immediately but the starter turns, it could be due to a few reasons. One possibility is that the fuel tank ran out of fuel during operation, in which case you should add fuel. Another reason could be a clogged fuel prefilter, so you should change the fuel prefilter. Finally, the main fuel filter might be clogged, requiring you to change the main fuel filter.
L
Lori DixonAug 17, 2025
Why is my Hatz 3H50 losing power and speed?
- K
  Katie MarksAug 17, 2025
  If your Hatz Engine loses power and speed, it could be due to the engine running because of a fault in the emergency run function. In this case, switch off the engine, wait at least 1 minute, and then restart it. Another reason might be that the tank ran out of fuel during operation, so add fuel.
M
Matthew WilliamsAug 21, 2025
What to do if Hatz Engine becomes very hot?
- P
  Paul DavisAug 21, 2025
  If your Hatz Engine becomes very hot and the temperature indicator lights up, it could be because the radiator fins are dirty or the radiator is blocked. You should clean the radiator fins and ensure airflow through the radiator isn't hindered. Another possible cause is low coolant level, so you should check the cooling system. For thermostat or water pump issues, contact HATZ Service.
O
oblakeAug 25, 2025
How to start Hatz Engine in cold weather?
- J
  Justin StevensAug 26, 2025
  If your Hatz Engine doesn't start at low temperatures, the oil may be too viscous, causing a low starter speed. Change the engine oil and oil filter, and add engine oil with a suitable viscosity class. Another cause could be an insufficiently charged battery, so check the battery and contact the service center if necessary. Also, ensure the machine is uncoupled; if possible, separate the engine from the machine by uncoupling it.
W
wheelershannonAug 28, 2025
Why does my Hatz 3H50 switch off spontaneously?
- C
  cpayneAug 29, 2025
  If your Hatz Engine switches off spontaneously, it could be due to the tank running out of fuel, so you should fill it with fuel. Another cause might be electrical defects, in which case you should check the wiring or contact HATZ Service.
Z
zstoneSep 1, 2025
What does it mean when the Hatz Engine fault indicator is flashing?
- J
  Jeff MooreSep 1, 2025
  If the indicator for engine fault on the Hatz instrument box is flashing, it might be due to a low coolant level, so top up the coolant. Another cause could be that the maximum water level in the water separator has been reached, so drain water from the fuel pre-filter. For various errors in different assemblies, contact HATZ Service.
J
Jacob HawkinsSep 5, 2025
Why is my Hatz 3H50 smoking black and losing power?
- R
  ramseyricardoSep 5, 2025
  If the Hatz Engine loses power and speed, and black smoke emerges from the exhaust, the air filter unit may be dirty. Check the degree of dirt contamination of the air filter, and clean or renew it if necessary.
M
Mary ClarkSep 8, 2025
What to do if Hatz 3H50 Engine starter does not switch on?
- M
  maryhoSep 8, 2025
  If the starter does not switch on and the Hatz Engine does not turn, the battery and/or other cable connections may be incorrectly connected. Check the electrical equipment and its components or contact Hatz service.

Hatz 3H50 Series Specifications

General

Cooling	Air-cooled
Speed	3000 rpm
Fuel Type	Diesel
Engine Type	Diesel
Displacement	462 cm³

Summary

Safety

Technical Data

Engine Information and Filling Quantities

Provides key specifications and filling quantities for the engine models.

Engine Oil Specifications

Specifies oil quality, viscosity, and cautions for engines with and without DOC.

Coolant Information and Safety

Information on coolant requirements, safety notes, and preparation.

Fuel Type Requirements

Specifies fuel types, quality requirements, and cautions for fuel usage.

Engine Overview

Transport, Assembly, and Commissioning

Filling Engine Oil (First Filling)

Procedure for filling engine oil for the first time.

Starting Engine First Time/After Filter Replacement

Safety notes and procedures for initial engine start or post-filter replacement.

Operation and Use

Starting the Engine Procedure

Safety notes and procedure for starting the engine.

Checking Engine Oil Level

Procedure and safety notes for checking the engine oil level.

Diesel Particulate Filter Regeneration

Information on automatic and manual regeneration of the DPF.

Maintenance

Maintenance Plan Overview

Changing Engine Oil and Oil Filter

Changing Main Fuel Filter

Changing Coolant

Faults

Troubleshooting Engine Faults

Engine Start Support (Jump Starting)

Storage and Disposal

Storing the Machine for Long Periods

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