Bosch and L’Orange Fuel Injection Technology – Parts, Overhaul and Technical Support from One Source

Your Independent One-Stop Specialist for Conventional Diesel Fuel Injection Technology

Einspritzpumpen Manufaktur NRW is an independent specialist workshop and full-service supplier for conventional Bosch and L’Orange fuel injection technology.

Our capabilities extend from technical component identification and worldwide spare-parts sourcing to the complete overhaul, calibration and test-bench verification of fuel injection pumps and associated injection components.

We support engine operators, shipowners, shipping companies, power-generation businesses, industrial companies, engine rebuilders, service organisations, diesel workshops, spare-parts suppliers and technical procurement departments throughout the service life of their engines.

Whether one individual component, a complete injection-pump assembly or a specially developed replacement for an obsolete part is required, our objective is to provide a technically reliable and commercially appropriate solution.

Our range of products and services includes:

Bosch and L’Orange fuel injection pumps
inline and individual cylinder pumps
plunger-and-barrel assemblies
pump elements
delivery valves and delivery-valve assemblies
fuel injection nozzles
nozzle holders and nozzle-and-holder assemblies
pump heads and high-pressure components
sealing, screw and service kits
genuine manufacturer parts and OEM components, where available
new, new old stock, exchange and overhauled components
injection-pump repair and complete overhaul
test-bench calibration and functional verification
technical identification and cross-referencing
reverse engineering of obsolete components
international order processing and worldwide delivery

Request a Technical Fuel Injection Assessment

Explore Our Medium and Large Engine Fuel Injection Services

One Specialist for the Complete Fuel Injection System

A reliable diesel fuel injection system consists of considerably more than the injection pump itself.

Pump elements, plunger-and-barrel assemblies, delivery valves, high-pressure lines, nozzle holders, injection nozzles and other system components must match the engine application and operate together as one accurately coordinated system.

For this reason, we do not assess only the individual part submitted to us. Where required, we consider the complete fuel injection system and its relationship with the engine.

Depending on the engine, injection system and requested scope of work, our services include:

unambiguous identification of the existing components
comparison of manufacturer, engine and cross-reference numbers
verification of the technical component version
sourcing of suitable spare and wear parts
inspection and overhaul of customer-owned components
calibration according to available pump and engine data
matching of injection pumps and nozzle-holder assemblies
preparation of complete injection sets
supply of new, exchange or overhauled components
technical solutions for discontinued and obsolete parts

Our customers receive more than an individual component. They receive a solution selected according to engine application, operating requirements, availability, delivery time and commercial feasibility.

Bosch Fuel Injection Technology

Conventional Bosch Injection Systems for Vehicles, Off-Highway Applications, Industrial Engines and Large Engines

Bosch fuel injection technology has been used for decades in commercial vehicles, agricultural machinery, construction equipment, stationary installations, railway applications, marine engines, generating sets and industrial diesel engines.

We support a broad range of conventional Bosch fuel injection systems – from classic mechanical injection pumps for vehicle and off-highway applications to large fuel injection systems for marine, industrial and power-generation engines.

Bosch Fuel Injection Pumps

Our capabilities include, among others:

Bosch inline fuel injection pumps
Bosch M-type injection pumps
Bosch A-type injection pumps
Bosch MW injection pumps
Bosch P-type injection pumps
Bosch P9 fuel injection pumps
Bosch P10 fuel injection pumps
Bosch PE and PES inline pumps
Bosch PF, PFR and PF1 individual cylinder pumps
Bosch ZWM pumps
multi-cylinder injection pumps for industrial and large engines
additional conventional Bosch pump types following technical assessment

In addition to complete injection pumps, we supply, inspect and overhaul associated components and wear parts.

Bosch Fuel Injection Components

Depending on the pump type, engine application and current availability, our product and service range can include:

pump elements
plungers and barrels
plunger-and-barrel assemblies
delivery valves
delivery-valve assemblies
delivery-valve holders
roller tappets and tappet rollers
pump shafts and camshafts
control and adjustment components
sealing and repair kits
housing and drive components
injection nozzles
nozzle bodies
nozzle holders
nozzle-and-holder assemblies
pressure pins, springs and adjusting shims
nozzle-retaining nuts
fuel feed pumps
high-pressure connections
further pump-specific components

Not every component for a historical Bosch injection system remains available through normal supply channels. We therefore assess several possible supply routes, including current genuine parts, OEM components, new old stock, serviceable exchange components, repairable core units and individually manufactured replacement parts.

General Bosch Fuel Injection Pump Overhaul, Repair and Calibration

Performance Bosch M-Type Injection Pumps for Mercedes OM601–OM606

Bosch P9 Fuel Injection Pump Repair, Overhaul and Calibration

Bosch P10 Fuel Injection Pump Repair, Overhaul and Calibration

L’Orange and Woodward L’Orange Fuel Injection Technology

Parts Supply and Overhaul Support for Conventional L’Orange Systems

Conventional L’Orange fuel injection systems are used in numerous medium- and high-speed large diesel engines. Typical applications include marine propulsion, auxiliary engines, stationary power generation, industrial installations and continuously operated generating sets.

We support engine operators and specialist repair businesses with the identification, sourcing, overhaul and testing of conventional L’Orange and Woodward L’Orange components.

Depending on the pump type, technical version and component availability, our capabilities include:

complete L’Orange fuel injection pumps
inline and individual cylinder pumps
pump elements
plunger-and-barrel assemblies
pump heads
delivery valves and valve assemblies
injection valves
injection nozzles
nozzle holders and nozzle bodies
pressure springs and adjusting components
sealing and service kits
screw and assembly kits
housing and drive components
overhauled and repairable exchange components
historical components no longer available through regular supply channels

One of our principal specialist areas is conventional L’Orange fuel injection technology for existing MWM and Deutz-MWM engines, including injection pumps and associated components for the TBD440 and TBD441 engine families.

We consider different pump versions, engine configurations, mounting positions, operating directions and port or starboard applications. Reliable identification requires the complete L’Orange pump designation, the engine-manufacturer reference and the exact engine version.

L’Orange components for other engine manufacturers and applications can also be submitted for individual technical assessment.

L’Orange Injection Pump Repair for MWM TBD440 and TBD441 Engines

Long-Term Spare-Parts Support for Existing and Classic Engines

Technical Identification Instead of a Simple Catalogue Search

For older engines, one part number is often insufficient for reliable component identification.

Engine configurations may have been modified during their service life. Part-number systems may have changed, earlier references may have been superseded and visually similar components may differ internally.

Technical identification is therefore one of our central services.

Where information is available, we research and compare:

Bosch type numbers
Bosch part numbers
L’Orange and Woodward L’Orange references
engine-manufacturer part numbers
earlier and later cross-reference numbers
pump and nozzle designations
engine types and technical versions
number of cylinders
direction of rotation
port and starboard versions
technical drawings and parts lists
existing sample parts and used components
superseded and replacement references

Our objective is not to supply a component that merely looks similar. The component must be technically suitable for the existing fuel injection system and its specific engine application.

Different Supply Routes for Different Requirements

Depending on urgency, technical availability and commercial considerations, we assess several possible solutions:

new genuine manufacturer parts
new OEM components
suitable quality replacement parts
new old stock, or NOS
professionally overhauled components
exchange units
inspected and repairable used components
overhaul of the customer’s existing component
reproduction through reverse engineering
technically suitable alternative solutions

This approach helps keep established engines operating even when their original series production and regular spare-parts support ended many years ago.

New, Exchange and Overhauled Fuel Injection Components

Selecting the Commercially Appropriate Solution

Not every repair requires a new component. At the same time, not every used part is suitable for reliable continued operation.

We therefore consider the technical condition, component availability, required delivery time, expected operating demands and overall cost of each proposed solution.

New Components

Depending on manufacturer, engine type and market availability, we can supply current genuine parts, OEM components or technically appropriate replacement parts.

New Old Stock Components

Unused components from historical stock can provide an important solution for discontinued fuel injection systems. Their exact version, storage condition and technical suitability must be verified before installation.

Overhauled Components

Existing injection pumps, individual cylinder pumps, nozzle holders and associated components can be dismantled, cleaned, inspected, repaired, reassembled and subsequently calibrated or function-tested.

Exchange Units

Where suitable core units are available, exchange components can significantly reduce engine and plant downtime.

Serviceable Historical Components

Certain housings, pump bodies, drive components or other rare parts may be suitable as the basis for an overhaul or technical reconstruction following detailed inspection.

The most appropriate solution is selected together with the customer, taking availability, urgency, operating reliability and commercial feasibility into account.

In-House Specialist Workshop for Diesel Fuel Injection Equipment

Inspection, Overhaul, Calibration and Functional Testing

Einspritzpumpen Manufaktur NRW is not solely a spare-parts supplier. A substantial part of our work is performed in our own specialist workshop in North Rhine-Westphalia, Germany.

Depending on pump type, technical condition and agreed scope, an overhaul may include:

Incoming inspection and documentation
Identification of pump type, version and part numbers
Complete controlled dismantling
Multi-stage cleaning of individual components
Visual, dimensional and wear inspection
Assessment of housing, shafts, cams, tappets and control mechanisms
Inspection of pump elements and delivery valves
Replacement or professional reconditioning of worn components
Restoration of technically serviceable individual parts
Precision reassembly
Mechanical basic adjustment
Calibration on a suitable fuel injection pump test bench
Measurement of delivery quantities and cylinder-to-cylinder uniformity
Leakage and functional testing
Final documentation and preparation for shipment

The exact procedure depends on the pump design, internal condition, spare-parts availability and technical requirements of the associated engine.

Where appropriate, we can provide an initial inspection and repair proposal before extensive work is carried out. This gives operators, maintenance managers and technical purchasers a reliable basis for their repair-or-replace decision.

Learn More About Our Fuel Injection Pump Overhaul Services

Test-Bench Technology for Small and Large Fuel Injection Pumps

Reproducible Measurement Instead of Subjective Assessment

A professional overhaul does not end when worn components have been replaced.

The decisive question is how the injection pump operates under defined speed, load and control conditions. Final test-bench calibration is therefore an essential part of a complete injection-pump overhaul.

We use Bosch EPS test-bench technology and specially adapted test equipment for different pump sizes and configurations.

Depending on the particular injection pump and available technical specifications, our test capabilities can include:

testing at different pump speeds and load points
measurement of individual delivery quantities
comparison of all pump sections
adjustment of cylinder-to-cylinder fuel-delivery uniformity
testing of delivery behaviour and repeatability
assessment of control start and control end
evaluation of the mechanical control characteristics
testing of fuel shut-off operation
leakage testing
assessment of fuel-feed and supply functions
calibration according to available pump and engine data
documented final verification

For particularly large and long inline injection pumps, we operate a specially developed test-bench solution.

This equipment enables us to assess large injection pumps and tandem-pump assemblies serving engines with up to 16 cylinders. Such capability is particularly important for rare industrial, marine and power-generation applications that cannot be accommodated adequately on conventional diesel test benches.

16-Cylinder Fuel Injection Pump Test Bench – Repair, Rebuild and Calibration

Complete Fuel Injection Sets for Engine Overhauls

Coordinated Inspection of Pumps and Nozzle-Holder Assemblies

Following an engine overhaul, or when investigating uneven engine operation, it can be beneficial to assess the complete fuel injection set instead of inspecting only one individual component.

Depending on the application, we can process:

the complete inline fuel injection pump
several individual cylinder pumps belonging to one engine
all nozzle-holder assemblies from the engine
injection nozzles and delivery valves
pump and nozzle sets for one cylinder bank
complete injection sets for inline and V-engines

Processing the related components together makes it easier to establish consistent operating characteristics.

This is particularly important for multi-cylinder industrial and large engines, where differences between cylinders can contribute to:

uneven engine operation
differing exhaust-gas temperatures
increased smoke formation
unequal cylinder loading
irregular power output
reduced fuel efficiency
increased thermal and mechanical stress

Reverse Engineering and Solutions for Obsolete Components

When Regular Spare-Parts Supply Is No Longer Available

Many mechanical fuel injection systems remain in service far beyond their original production period.

The associated engine may still be reliable and economically valuable, while one individual injection component has been discontinued by its original manufacturer.

In such cases, we assess whether the existing component can be:

professionally overhauled
identified under an earlier or later cross-reference number
sourced as a new old stock component
recovered from a technically suitable core unit
replaced by a compatible alternative component
reconstructed and newly manufactured

Depending on the component, reverse engineering can include:

technical measurement
functional analysis
dimensional documentation
CAD reconstruction
determination of fits and tolerances
selection of suitable materials
definition of surface and heat-treatment requirements
manufacturing by specialised production partners
dimensional inspection
functional verification before installation

Geometrical similarity alone is not sufficient for a reliable fuel injection component. Material properties, hardness, surface finish, tolerances, wear behaviour and interaction with adjoining parts are also critical.

Reproduction is therefore undertaken only after individual technical and commercial feasibility assessment.

Reverse Engineering for Bosch and L’Orange Fuel Injection Components

Fuel Injection Support for Marine, Power-Generation and Industrial Applications

Our Bosch and L’Orange products and services are particularly relevant to operators and specialist businesses in the following sectors:

marine propulsion
marine main and auxiliary engines
inland and ocean-going vessels
commercial shipping
power stations
combined heat and power plants
emergency power installations
stationary generating sets
industrial plants
pump and compressor drives
railway applications
construction and mining machinery
agricultural equipment
commercial vehicles
municipal and special-purpose vehicles
classic vehicles and historical diesel engines
individual machines and special applications

We support both scheduled engine overhauls and time-critical repair cases in which plant, vessel, vehicle or machine availability must be restored as quickly as technically possible.

Marine and Ship Engine Fuel Injection Pump Repair

Fuel Injection Applications for Different Engine Manufacturers

Bosch and L’Orange fuel injection components are fitted to engines produced by numerous European and international manufacturers.

We inspect, overhaul and source suitable components for applications including:

Deutz
MWM
MTU
Mercedes-Benz
MAN
MaK
Wärtsilä
Cummins
Mitsubishi
Scania
and other manufacturers of vehicle, off-highway, industrial, marine and power-generation engines

The manufacturer name alone is not sufficient for binding component identification. Different injection-system versions may have been used within the same engine family depending on production date, number of cylinders, rated output, engine speed, application and technical modification level.

Selected MWM and Deutz Application Pages

MWM/Deutz TBD232, TBD234, TBD616 and TCD2016 Fuel Injection Pumps

MWM/Deutz TBD604 Fuel Injection Pump Overhaul and Calibration

MWM/Deutz TBD620 and TCD2020 Fuel Injection Pumps

Complete Medium and Large Engine Fuel Injection Overview

Support for Different Professional Responsibilities

For Engineers and Technical Specialists

We support the technical assessment of pump versions, component configurations, available calibration data and system relationships.

Special applications and obsolete systems can be evaluated individually to develop a suitable repair, replacement or reproduction strategy.

For Technicians and Mechanics

Clear component identification, suitable spare parts and complete tested injection sets help reduce uncertainty during installation and commissioning.

Nameplate photographs, technical documentation and existing sample components can be used during identification.

For Maintenance Managers and Service Coordinators

Repair, exchange and procurement options can be compared with particular attention to lead time, operational urgency and expected equipment downtime.

For Technical Purchasing Departments

Quotations can distinguish between new parts, overhaul, exchange and individually manufactured solutions. Manufacturer, engine and cross-reference numbers are compared wherever reliable information is available.

For Controllers and Engine Operators

Overhauling an existing component can provide a significant commercial advantage over complete replacement. However, remaining service life, technical risk, component availability and the financial consequences of downtime must also be considered.

Our objective is to provide the information required for a sound technical and commercial decision.

International Service and Worldwide Delivery

Our customers are located throughout Germany, Europe and international markets.

We support international enquiries with:

technical fuel injection component identification
communication in German and English
comparison of different part-number systems
preparation of clear individual quotations
secure packaging of precision fuel injection components
international shipping
return shipment of overhauled customer-owned units
identification by customer purchase-order or job number
coordination of time-critical deliveries

International customers can provide their engine, pump and component information in English or German.

Before sending an injection pump or other component to Germany, please contact us with the available identification details and photographs. This allows us to carry out an initial technical assessment and provide suitable shipping instructions.

How Your Enquiry Is Processed

1. Submit the Available Technical Information

Send us the engine type, pump designation, part numbers and clear photographs.

2. Component Identification

We assess the manufacturer, pump type, technical version, engine application and possible cross-reference numbers.

3. Evaluation of Available Solutions

Depending on technical condition and availability, we assess new parts, spare parts, overhaul, exchange or an individually developed replacement solution.

4. Supply or Workshop Processing

The required components are supplied, or the customer’s injection equipment is dismantled, inspected, repaired and tested in our workshop.

5. Documentation and Delivery

After completion, the components are prepared for secure return shipment or international delivery.

Information Required for a Technical Assessment

Please provide as much of the following information as possible:

engine manufacturer
complete engine model
engine serial number
number of cylinders
engine application
manufacturer of the fuel injection equipment
complete injection-pump designation
Bosch or L’Orange part number
engine-manufacturer part number
required quantity
requested service: spare part, inspection, overhaul or exchange
clear photograph of the complete nameplate
photographs of the complete component from several angles
photographs of all numbers and identification marks
description of the fault or reason for overhaul
information about previous repairs
customer purchase-order or job number
destination country
required delivery date

The more complete the information, the faster and more reliable the initial identification can be.

Submit Your Injection Pump for Technical Assessment

Frequently Asked Questions

Do You Work Exclusively on Large-Engine Fuel Injection Equipment?

No. Our capabilities range from conventional Bosch injection pumps for classic vehicles, commercial vehicles and off-highway machinery to large mechanical fuel injection systems for marine, industrial and power-generation engines.

Do You Repair Common-Rail Systems?

No. Our work focuses on conventional mechanical and non-common-rail diesel fuel injection technology. Common-rail systems are outside our service scope.

Can You Supply Complete Fuel Injection Pumps?

Depending on pump type and availability, we can supply new, overhauled, repairable or exchange injection pumps.

Do You Also Supply Individual Pump and Nozzle Components?

Yes. Depending on the system, our product range can include pump elements, plunger-and-barrel assemblies, delivery valves, injection nozzles, nozzle holders, sealing and service kits and other pump-specific components.

Can Injection Pumps and Nozzle-Holder Assemblies Be Processed Together?

Yes. Joint inspection and matching of the associated injection components can be particularly valuable during a complete engine overhaul.

What If the Part Number Is Missing or No Longer Legible?

Please send clear photographs, the complete engine information and all remaining markings. Identification may still be possible through the design, engine application, technical documentation, cross-reference information or an original sample component.

Can You Replace Components That Are No Longer Available?

We first investigate existing stock, new old stock, cross-reference components and repair possibilities. If no regular solution is available, technical reconstruction or reproduction can be assessed.

Can International Customers Send Components to Germany?

Yes. We accept international enquiries and workshop orders by prior arrangement. Please provide the identification information and photographs before shipping.

Are You an Independent Specialist Workshop?

Yes. Einspritzpumpen Manufaktur NRW operates as an independent specialist workshop and supplier for conventional Bosch and L’Orange fuel injection technology.

Manufacturer names and trademarks are used solely for the technical identification of products and applications.

One Contact for Your Complete Conventional Fuel Injection Requirements

Whether you require one injection nozzle, a complete inline pump, a full injection set for a large engine or a difficult-to-source L’Orange component, we combine technical consultation, spare-parts support, in-house overhaul, specialised test-bench capability and reverse engineering.

Our objective is to develop a technically reliable and commercially appropriate solution for each enquiry – helping operators keep proven engines in dependable service.

Request Your Individual Technical Assessment

Send us the engine type, injection-pump designation, part numbers and clear photographs. We will review the available options and prepare an individual proposal based on the actual component and requested scope of work.

Einspritzpumpen Manufaktur NRW

Bosch and L’Orange Fuel Injection Technology – Parts, Overhaul, Calibration and Technical Solutions from One Source

Request a Fuel Injection Pump Assessment

Explore Our Large Engine Fuel Injection Capabilities