REHLKO DIESEL
Diesel engines

REHLKO DIESEL
Diesel engines

The heritage and evolution of compact diesel technology

The heritage and evolution of compact diesel technology

REHLKO DIESEL (LOMBARDINI) is a brand that has grown into a leader
in diesel-engine technology since its founding in Reggio Emilia, Italy,
in 1933.

REHLKO DIESEL (LOMBARDINI) is a brand that has grown into a leader
in diesel-engine technology since its founding in Reggio Emilia, Italy,
in 1933.

REHLKO DIESEL (LOMBARDINI) is a brand that has grown into a leader in diesel-engine technology since its founding in Reggio Emilia, Italy, in 1933.

On a foundation of more than 80 years of accumulated engineering, it has earned recognition for stability and efficiency in agriculture, construction, generators, industrial equipment, and special-purpose equipment.
In 2007 it joined the KOHLER Group, expanding its global network and technical infrastructure, and it now continues to advance its industrial diesel-engine
lineup under the REHLKO brand.

On a foundation of more than 80 years of accumulated engineering, it has earned recognition for stability and efficiency in agriculture, construction, generators, industrial equipment, and special-purpose equipment.
In 2007 it joined the KOHLER Group, expanding its global network and technical infrastructure, and it now continues to advance its industrial diesel-engine lineup under the REHLKO brand.

On a foundation of more than 80 years of accumulated engineering, it has earned recognition for stability and efficiency in agriculture, construction, generators, industrial equipment, and special-purpose equipment.
In 2007 it joined the KOHLER Group, expanding its global network and technical infrastructure, and it now continues to advance its industrial
diesel-engine lineup under the REHLKO brand.

As an official partner, U-Young Industries operates a supply, parts, technical,
and service system aligned with manufacturer standards.
We do not supply engines; we connect operational stability.

As an official partner, U-Young Industries operates a supply, parts, technical, and service system aligned with manufacturer standards.
We do not supply engines;
we connect operational stability.

SERIES OVERVIEW

REHLKO DIESEL
Key lineup

U-Young Industries operates official technical documentation
and a parts system for the following lineup.
Each series has a clear position according to output scale,
installation environment, and operating conditions.
  • Air-Cooled Diesel Line

  • Water-Cooled Diesel Line

  • EU Stage V / USA Tier 4 Final-Compliant Models

SERIES OVERVIEW

REHLKO (LOMBARDINI)
주요 라인업

REHLKO (LOMBARDINI)
Key lineup

우영산업은 다음 라인업에 대한
공식 기술 자료 및 부품 체계를 운영합니다.
각 시리즈는 출력 규모, 설치 환경, 운용 조건에 따라
명확한 포지션을 갖습니다.
U-Young Industries operates official technical documentation
and a parts system for the following lineup.
Each series has a clear position
according to output scale,
installation environment,
and operating conditions.
U-Young Industries operates official technical documentation
and a parts system for the following lineup.
Each series has a clear position according to output scale,
installation environment, and operating conditions.
  • Air-Cooled Diesel Line

  • Water-Cooled Diesel Line

  • EU Stage V / USA Tier 4 Final-Compliant Models

Air-Cooled Diesel Engine Line

Air-Cooled Diesel Engine Line

Air-Cooled Diesel Engine Line

KD625-2

KD625-2

Output Position

Description Description Description Description Description Description Description
(최대 184자)

18.8KW(25.5hp)

18.8KW(25.5hp)

Displacement

Description Description Description Description Description Description Description
(최대 184자)

1248cc

1248cc

Cooling method

Description Description Description Description Description Description Description
(최대 184자)

공냉식(Air-Cooled)

공냉식(Air-Cooled)

Air-Cooled Diesel Engine Line

Air-Cooled Diesel Engine Line

Air-Cooled Diesel Engine Line

KD425-2

KD425-2

Output Position

Description Description Description Description Description Description Description
(최대 184자)

13kW(17.4hp)

13kW(17.4hp)

Displacement

Description Description Description Description Description Description Description
(최대 184자)

851cc

851cc

Cooling method

Description Description Description Description Description Description Description
(최대 184자)

공냉식(Air-Cooled)

공냉식(Air-Cooled)

Air-Cooled Diesel Engine Line

Air-Cooled Diesel Engine Line

Air-Cooled Diesel Engine Line

KD15-440

KD15-440

Output Position

Description Description Description Description Description Description Description
(최대 184자)

7.4kW(10.1hp)

7.4kW(10.1hp)

Displacement

Description Description Description Description Description Description Description
(최대 184자)

441cc

441cc

Cooling method

Description Description Description Description Description Description Description
(최대 184자)

공냉식(Air-Cooled)

공냉식(Air-Cooled)

Air-Cooled Diesel Engine Line

Air-Cooled Diesel Engine Line

Air-Cooled Diesel Engine Line

KD15-350

KD15-350

Output Position

Description Description Description Description Description Description Description
(최대 184자)

5.1kW(7hp)

5.1kW(7hp)

Displacement

Description Description Description Description Description Description Description
(최대 184자)

349cc

349cc

Cooling method

Description Description Description Description Description Description Description
(최대 184자)

공냉식 (Air-Cooled)

공냉식 (Air-Cooled)

ENGINE

WHY REHLKO DIESEL

WHY REHLKO DIESEL

The authenticity and practicality
of European diesel technology

The authenticity and practicality
of European diesel technology

REHLKO diesel engines are

an industrial platform optimized

for the small-to-mid output range.

REHLKO diesel engines are

an industrial platform optimized

for the small-to-mid output range.

Compact design

High-efficiency combustion technology

A durability-centered structure

Broad industrial-application experience

Global emissions-regulation compliance

It is widely applied across agricultural equipment, small construction equipment, generators, and special-equipment platforms. This brand's strength lies in "structural stability proven on the actual site."

It is widely applied across agricultural equipment, small construction equipment, generators, and special-equipment platforms. This brand's strength lies in "structural stability proven on the actual site."

REHLKO Technology Advantages

Diesel technology accumulated
since 1933
Expertise in small and
mid-range diesel
Compact Industrial
Design
EU Stage V / USA Tier 4
Final-compliant models
Some models meet regulations without
an after-treatment system
Diesel technology accumulated since 1933
Expertise in small and
mid-range diesel
Compact Industrial Design
EU Stage V / USA Tier 4 Final-compliant models
ome models meet regulations without an after-treatment system

Total Cost of Ownership Perspective

Daily operating hours

Daily operating hours

Load-repetition structure

Load-repetition structure

Installation

space

Installation

space

Emissions-regulation requirements

Emissions-regulation requirements

Maintenance accessibility

Maintenance accessibility

Engine selection should be judged by operating efficiency, not price.

Engine selection should be judged
by operating efficiency, not price.

Get Technical Consultation
REHLKO & U-YOUNG

An official partner framework that maintains manufacturer standards

As the official partner of REHLKO DIESEL, U-Young Industries maintains the following standards.

Response based on official technical documentation

Response based on official technical documentation

Response based on official technical documentation

Maintaining the

genuine-parts system

Maintaining the

genuine-parts system

Maintaining the

genuine-parts system

Adherence to the manufacturer's standard service protocol

Adherence to the manufacturer's standard service protocol

Adherence to the manufacturer's standard service protocol

Specification matching centered on long-term operation

Specification matching centered on long-term operation

Specification matching centered on long-term operation

It is an official supply structure that maintains brand-technical consistency.

ENGINE FINDER

Small and mid-range diesel, condition-based search

REHLKO engines are selected according to installation space and output requirements.

Output range
(HP / kW)
Output range
(HP / kW)
출력 범위
(HP / kW)
Cylinder configuration
Cylinder configuration
Cooling method (air- or water-cooled)
Cooling method (air- or water-cooled)
냉각 방식
(공냉 / 수냉)
Emissions-regulation stage
Emissions-regulation stage
Equipment
type
Equipment
type

Filter-based search lets you quickly find a suitable model.

View by Series
Download Datasheet
PERFORMANCE & COMPLIANCE
PERFORMANCE & COMPLIANCE

Emissions-regulation response and technical evolution

Emissions-regulation response and technical evolution

REHLKO holds engine technology that complies with EU Stage V / USA Tier 4 Final regulations. Some models are designed to meet emissions standards even without an after-treatment device. This offers major advantages in simplifying installation, reducing maintenance costs, and securing space efficiency.
U-Young Industries provides technical support aligned with these standards.

REHLKO holds engine technology that complies with EU Stage V / USA Tier 4 Final regulations. Some models are designed to meet emissions standards even without an after-treatment device. This offers major advantages in simplifying installation, reducing maintenance costs, and securing space efficiency.
U-Young Industries provides technical support aligned with these standards.

REHLKO holds engine technology that complies with EU Stage V / USA Tier 4 Final regulations. Some models are designed to meet emissions standards even without an after-treatment device. This offers major advantages in simplifying installation, reducing maintenance costs, and securing space efficiency.
U-Young Industries provides technical support aligned with these standards.

GENUINE PARTS & LIFECYCLE SUPPORT

Operational stability based on genuine parts

An engine's lifespan is determined by parts management.

U-Young Industries maintains REHLKO's genuine-parts system and supports the engine's entire lifecycle.

An engine's lifespan is determined by parts management. U-Young Industries maintains REHLKO's genuine-parts system and supports the engine's entire lifecycle.

Genuine-parts management

Genuine-parts management

Preventive

inspection

Preventive

inspection

Repair and

overhaul

Repair and

overhaul

Long-term operation consulting

Long-term operation consulting

Operation begins after adoption.

MODEL COMPARISON

Compare Models Before You Decide

Compare Models
Before You Decide

Compare output, cylinder configuration, cooling method, emissions regulations,

and operating conditions to select the right model.

출력, 실린더 구성, 냉각 방식, 배출 규제, 운용 조건을

비교하여 적합 모델을 선택하십시오.

Compare Models

REHLKO Key Series Comparison

Category

Category

KD Series (air-cooled)

KD Series (air-cooled)

KD Series (air-cooled)

FOCS Series B (water-cooled)

FOCS Series B (water-cooled)

FOCS Series B (water-cooled)

KSD Series (water-cooled)

KSD Series (water-cooled)

KSD Series (water-cooled)

KDI Series (water-cooled)

KDI Series (water-cooled)

KDI Series (water-cooled)

Engine Type

Diesel

Diesel

Diesel

Diesel

Cylinder Configuration

single- or multi-cylinder

multi-cylinder

multi-cylinder

multi-cylinder

Cooling Method

air-cooled

water-cooled

water-cooled

water-cooled

Output Range

small output

mid-range output

mid-range output

mid-range output

Emissions Regulation

Stage IIIA

Stage IIIA

Stage V / Tier 4 Final

Stage V / Tier 4 Final

Operating Characteristics

simple and durable

continuous operation

latest-regulation compliance

latest-regulation compliance

Maintenance Accessibility

very high maintenance accessibility

excellent maintenance accessibility

electronic control included

electronic control included

Genuine-Parts System

O

O

O

O

U-YOUNG Industries
Technical Support

official U-Young technical support

official U-Young technical support

official U-Young technical support

official U-Young technical support

Sroll

APPLICATION APPROACH

By operating conditions, not industry category

REHLKO engines should be selected based on installation space, load conditions, and regulatory environment.

U-Young Industries proposes suitable models based on an analysis of operating conditions.

Engine selection is a matter of suitability, not output.

REHLKO engines should be selected based on installation space, load conditions,

and regulatory environment.

U-Young Industries proposes suitable models based on an analysis of operating conditions.

Engine selection is a matter of suitability, not output.

Built on Trust.
Driven by Responsibility.

REHLKO DIESEL is a brand that has accumulated
more than 80 years of diesel technology.

REHLKO DIESEL is a brand that
has accumulated
more than 80 years of diesel technology.

U-Young Industries delivers that technology to the market exactly

as the manufacturer's standard requires. Stable power is completed on precise standards.

Global Brand Alignment

U-Young Industries is an official partner that maintains

REHLKO's technical standards and market-operation system identically.

Protecting Brand Integrity

Maintaining the Genuine Parts system

Maintaining Technical Compliance

Securing long-term market stability

Global Brand Alignment

U-Young Industries is an official

partner that maintains

REHLKO's technical standards and market-operation system identically.

Protecting Brand Integrity

Maintaining the Genuine Parts system

Maintaining Technical Compliance

Securing long-term market stability

© 2026 U-Young, All rights reserved.

Headquarters:

Room 305, Bldg. 1, 775 Gyeongin-ro, Yeongdeungpo-gu, Seoul
TEL : 02-549-0611, 3439-1611-6
FAX : 02-548-6683

© 2026 U-Young, All rights reserved.

© 2026 U-Young, All rights reserved.