Hatz F-Series 3F45 Liquid-Cooled Diesel Engine and OPU

Compact liquid-cooled diesels up to 19 kW, delivered as a ready-to-install unit

The Hatz 3F45 is part of the Hatz F-Series, which extends the Hatz range of water-cooled industrial diesel engines with compact three- and four-cylinder engines up to 19 kilowatts. Displacements are 0.95, 1.1, 1.3 and 1.75 litres, and Hatz states that eleven engine models cover outputs from 7.5 to 18.4 kW and torque from 48 to 76 Nm, meeting EU Stage V and EPA Tier 4 final without exhaust aftertreatment.

All F-Series variants are offered as an Open Power Unit (OPU). Besides the standard scope, the air filter, silencer, radiator and wiring harness are already fitted at delivery, so the machine builder has no assembly work on the cooling, fuel, electrical and combustion air systems. The data sheet lists a 250-hour maintenance interval, ambient operation up to 50 degrees C and a manufacturer extended warranty of up to five years for the whole system as features of the OPU.

Technical specifications

Fan arrangement, speed classes and control

The data sheet distinguishes two fan layouts. VS (variable speed) engines use a suction fan with a radiator fan and are designed for variable-speed work; CS (constant speed) engines use a pressurised fan with a diameter of 340 mm. Variable-speed engines are also available in a fan-to-flywheel configuration for applications needing extra hydraulic oil cooling. Rated speeds in the power chart include 1500 and 1800 rpm for constant speed and 2400 to 3000 rpm for variable speed.

For the European market the engines have a mechanical governor, with an electronic governor optional; the EPA models come with an electronic governor as standard. In the table, the E suffix (3F35E, 3F45E, 4F45E) identifies the electronically governed versions.

Selecting the right F-Series engine

Choose the cylinder count and displacement from the power and torque needed at the working speed, then confirm the speed class (VS or CS) and whether the duty is prime or standby, because the data sheet gives separate figures such as 10.8 kW standby and 9.4 kW prime for the 3F35E at 1800 rpm. Check the flywheel and housing (6.5 or 7.5 inch flywheel and SAE 5 housing), the starter and alternator ratings, the cold start limit of minus 15 degrees C and the basic engine or OPU weight and dimensions.

Hatz points to a network of more than 500 service centres for spare parts and repair; confirm local parts support and service intervals for the application before ordering.

How the Hatz 3F45 works

The 3F45 is a three-cylinder, liquid-cooled four-stroke diesel. Fuel is injected mechanically into a swirl chamber and ignited by compression. Coolant circulates through the engine and the radiator of the Open Power Unit to carry the heat away.

Where the 3F45 is used

• Generator sets
• Compact construction machines
• Pumps and compressors
• Agricultural and municipal machinery
• Machine builders needing a ready-to-install power pack

Selection checklist for the 3F45

• Power at the working speed
• Variable or constant speed
• Cylinder count
• Starter and alternator rating
• Flywheel size
• Open Power Unit scope
• Ambient temperature
• Weight limit

Installation, commissioning and maintenance notes for the 3F45

Mount the unit on a rigid frame with clear air for the radiator. Connect the fuel line, the battery and the control wiring. Check the coolant and oil levels before the first start. Follow the maintenance interval in the data sheet.

Requesting a quotation for the Hatz 3F45

Please send the model, the speed type, the application and the quantity. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

3F45 engine family

It belongs to the Hatz F-Series of compact water-cooled diesel engines.

3F45 power class

The F-Series covers engines up to 19 kilowatts.

3F45 displacements

The family displacements are 0.95, 1.1, 1.3 and 1.75 litres.

3F45 model count

Hatz states that eleven engine models cover outputs from 7.5 to 18.4 kW.

3F45 torque range

Family torque runs from 48 to 76 Nm.

3F45 Open Power Unit

All F-Series variants are offered as an Open Power Unit.

3F45 fitted parts

The air filter, silencer, radiator and wiring harness are fitted at delivery.

3F45 maintenance interval

The data sheet lists a maintenance interval of 250 hours.

3F45 ambient temperature

Ambient operation is possible up to 50 degrees C.

3F45 engine type

It is a liquid-cooled four-stroke diesel with mechanical injection into a swirl chamber.

3F45 cylinders

The 3F45 has three cylinders.

3F45 bore and stroke

The bore and stroke are 78 x 92 mm.

3F45 displacement

The displacement is 1.318 litres.

3F45 compression ratio

The compression ratio is 22.0 to 1.

3F45 maximum power

Maximum power is 18.4 kW, or 24.6 hp, at 2400 and 3000 rpm.

3F45 constant speed ratings

Constant speed ratings are given at 1800 rpm for the E versions.

3F45 basic engine weight

The basic engine weighs 135 kg in variable speed form and 150 kg in constant speed form.

3F45 Open Power Unit weight

The Open Power Unit weighs 168 kg or 183 kg.

3F45 starter

The 12 V starter is rated 1.2 kW or 1.7 kW.

3F45 alternator

Charging current is 40 A or 65 A at 14 V.

3F45 cold start

The cold start temperature is minus 15 degrees C.

3F45 flywheel

The flywheel is 6.5 or 7.5 inch.

Engine records for the 3F45

Record the serial number, the operating hours and the date of each service.

Choosing the right 3F45 version

Choose the version from the speed behaviour and the output the machine needs.

Documents and quotation

The manufacturer data sheet is attached to this page for download. Seven Star LLC is an independent supplier in Muscat; send the model code, VS or CS version, quantity and whether you need the basic engine or the OPU, and we will request a quotation. Availability depends on the model. Related items: Motors, Pumps and Turbines.