Marine Diesel Fuel Injection Pump Repair and Overhaul

Inspection, Overhaul and Test-Bench Calibration for Commercial Shipping, Shipyards and Permitted Naval Applications

Einspritzpumpen Manufaktur NRW is a specialised German workshop for the technical inspection, condition assessment, repair, complete overhaul and test-bench calibration of mechanical fuel injection pumps for medium- and large-speed marine diesel engines.

Our services are intended for:

Shipowners

Shipping companies

Shipyards

Vessel operators

Marine engineering companies

Marine mechanics and engine fitters

Engine rebuilding companies

Technical superintendents

Fleet managers

Marine spare-parts suppliers

Government vessel operators

Public authorities

and, following complete export-control and end-user verification, organisations responsible for the maintenance of non-civilian naval vessels.

We work on mechanical fuel injection pumps for:

main propulsion engines
marine auxiliary engines
shipboard generator sets
emergency generator sets
pump drives
harbour and deck machinery
stationary maritime power systems
historical marine engines
engines for which regular manufacturer support or spare-parts supply is no longer available

Our principal focus is on historical and technically demanding mechanical fuel injection systems for which specialist knowledge, appropriate test-bench capacity and an individual spare-parts strategy are required.

Fuel Injection Pumps for Main Propulsion, Auxiliary Engines and Shipboard Power

The fuel injection pump is one of the central components of a mechanical marine diesel engine.

It directly influences:

fuel-delivery quantity
cylinder-to-cylinder balance
engine starting behaviour
load response
speed stability
exhaust-gas temperatures
smoke emissions
fuel consumption
engine performance
mechanical cylinder loading
operational reliability

A fault in the fuel injection system of a main propulsion engine can impair propulsion, manoeuvrability or the operational availability of the complete vessel.

On an auxiliary engine or generator set, injection-system problems can affect:

shipboard electrical power
cooling systems
pumps
hydraulic systems
navigation equipment
cargo systems
safety equipment
and other essential onboard consumers

For this reason, we do not consider a marine fuel injection pump merely as an isolated component.

It must be assessed as part of the complete propulsion, auxiliary-power or shipboard energy system.

Mechanical Bosch and L’Orange Fuel Injection Pumps

Depending on pump configuration, condition, technical documentation and spare-parts availability, our field of work includes the following mechanical injection-pump families.

Bosch Fuel Injection Pumps

Bosch A

Bosch MW

Bosch P

Bosch RP21

Bosch RP21C

Bosch RP25

Bosch P9

Bosch P10

Bosch PF1

as well as other mechanical Bosch inline and individual fuel injection pumps.

L’Orange Fuel Injection Pumps

We also work with historical mechanical L’Orange fuel injection pumps and individual pumping units used on MWM marine diesel engines, particularly in connection with:

TBD440 / TBD 440

TBD441 / TBD 441

Depending on the engine and pump version, these applications may include different:

port and starboard configurations
pump housings
individual pumping units
camshaft versions
directions of rotation
cylinder configurations
technical production stages

A binding technical assessment is always based on the complete pump identification, engine data and the actual configuration supplied.

Marine Engine Families

Subject to pump configuration, available technical data and spare-parts availability, we work on fuel injection systems for engine families including:

MWM/Deutz TBD232 and TBD 232

MWM/Deutz TBD234 and TBD 234

MWM/Deutz TBD440 and TBD 440

MWM/Deutz TBD441 and TBD 441

MWM/Deutz TBD604 and TBD 604

MWM/Deutz TBD616 and TBD 616

MWM/Deutz TBD620 and TBD 620

MWM/Deutz TCD2016 and TCD 2016

MWM/Deutz TCD2020 and TCD 2020

as well as mechanical injection systems for additional MWM, Deutz, MTU, MAN and industrial diesel engines.

The engine-family designation alone is not sufficient to identify the correct injection pump or calibration specification.

Within the same engine family, different pump versions may have been used depending on:

number of cylinders
engine output
rated speed
year of manufacture
propulsion or auxiliary application
direction of rotation
governor configuration
emissions specification
pump generation
marine configuration
customer-specific engine version
production status

The full engine and pump identification must therefore be verified before repair or calibration work begins.

Alternative Engine-Model Spellings

Marine documentation, spare-parts catalogues, service reports and search systems frequently use engine-model designations both with and without spaces.

Examples include:

TBD604 and TBD 604

TBD616 and TBD 616

TBD620 and TBD 620

TCD2016 and TCD 2016

TCD2020 and TCD 2020

TBD440 and TBD 440

TBD441 and TBD 441

Manufacturer combinations may also appear in different forms:

MWM TBD620

Deutz TBD620

MWM Deutz TBD 620

Deutz MWM TBD620

These different spellings may refer to the same engine family.

For technical identification, however, the decisive information is always taken from the engine identification plate, pump identification plate and available manufacturer documentation.

Technical Condition Assessment of Marine Fuel Injection Pumps

A professional overhaul begins with complete technical identification and condition assessment.

Depending on the pump and the agreed scope of work, this may include:

documentation of the incoming condition
inspection of the pump identification plate
identification of Bosch, MWM, Deutz or L’Orange numbers
comparison with engine and vessel data
verification of direction of rotation
assessment of the pump drive
visual inspection for corrosion and environmental damage
checking for fuel and oil leakage
inspection of control rack, linkage and shut-off mechanism
identification of previous repairs or modifications
preliminary test-bench operation where technically justifiable
complete disassembly
cleaning
precision measurement
technical component assessment
spare-parts availability review
determination of the required overhaul scope

Marine injection pumps may be affected by:

high operating hours
prolonged periods out of service
humid or salt-laden environments
water contamination
unsuitable fuel
emergency repairs
mixed component versions
undocumented previous adjustments

A reliable statement regarding repairability is therefore often possible only after cleaning, complete disassembly and measurement.

Acceptance of a pump does not automatically constitute confirmation that the unit is technically or economically repairable.

Complete Fuel Injection Pump Overhaul

During a complete overhaul, the fuel injection pump is carefully dismantled into its individual assemblies and components.

Depending on the pump configuration, we inspect components including:

pump housing
pumping elements
plungers and barrels
delivery valves
delivery-valve holders
camshaft
cam profiles
rollers
roller tappets
bearings
bushes
shafts
control rack
control sleeves
levers and linkages
springs
drive components
couplings
sealing faces
threads
fuel connections

Components are not assessed solely by visual appearance.

The decisive criteria are:

Dimensional accuracy, surface condition, wear and actual technical function.

Components that are no longer technically suitable are, after approval:

replaced
professionally reconditioned
matched with suitable historical stock
or assessed for possible reproduction

where regular original-part supply is no longer available.

Test-Bench Calibration for Marine Diesel Injection Pumps

Following mechanical overhaul, the fuel injection pump is operated and calibrated on the appropriate test bench.

Depending on the pump type and available technical specification, the test may include:

fuel-delivery quantity of every pumping element
cylinder-to-cylinder delivery balance
operation at different test speeds
idle behaviour
part-load operation
full-load delivery
repeatability
control-rack movement
governor response
shut-off function
external tightness
mechanical running behaviour

Calibration is carried out using:

clearly assigned manufacturer data
pump test sheets
engine acceptance documentation
suitable historical technical records
or an expressly agreed customer specification

Calibration data from a pump that merely appears externally similar is not adopted without verification.

Where original calibration data is incomplete or unavailable, the technical reference to be used must be agreed before final adjustment.

V16 Pump Pairs and Complete Tandem Pump Systems

On various V16 marine diesel engines, the complete fuel injection system consists of two mechanically related inline injection pumps.

This applies, depending on engine and pump version, to applications including:

MWM/Deutz TBD604 V16

MWM/Deutz TBD616 V16

MWM/Deutz TBD620 V16

MWM/Deutz TCD2020 V16

and other V16 large-diesel engines.

Two individually functioning pumps do not automatically form a correctly matched V16 fuel injection system.

Differences may result from:

unequal operating hours
different levels of wear
previous repair of only one pump
different pumping-element versions
modified base settings
pump-drive tolerances
coupling tolerances
unequal control-rack travel
differing fuel-delivery quantities
mixed or incorrectly assigned components

For V16 applications, we therefore recommend that both pumps be supplied together whenever possible.

Dedicated 16-Cylinder Fuel Injection Pump Test Bench

For large mechanical V16 injection systems, we operate a specially designed 16-cylinder fuel injection pump test bench with 16 graduated measuring cylinders.

Depending on pump configuration and available test data, this equipment enables:

testing of large inline fuel injection pumps
separate measurement of every pumping element
comparison of all fuel-delivery quantities
testing of both pumps from a V16 system
comparison of both cylinder banks
matching of related pump pairs
assessment of the complete 16-cylinder injection system
testing of mechanically coupled tandem pump arrangements

Our objective is not merely to deliver:

two individually overhauled injection pumps.

Our objective is to achieve:

a technically matched fuel injection system for the complete V16 marine engine.

A pump tested individually is not automatically synchronised with an unknown, modified or unavailable second pump.

Typical Faults and Damage Found in Marine Injection Pumps

Typical findings include:

worn pumping elements
excessive internal leakage
corrosion
water-related damage
damage following prolonged storage
seized plungers
damaged delivery valves
restricted control-rack movement
worn camshafts
damaged cam profiles
roller and roller-tappet wear
bearing and bush damage
fuel leakage
lubricating-oil leakage
damaged couplings
incorrectly combined components
damage caused by previous improper repair
unequal delivery quantities
incorrect internal base settings
incorrect start-of-delivery settings
contaminated internal fuel passages

Possible indications during engine operation include:

difficult starting
unstable engine operation
excessive smoke
unequal exhaust-gas temperatures
unstable speed
delayed load response
uneven cylinder output
increased fuel consumption
insufficient engine performance
unusual injection-pump noise
fuel or oil leakage
irregular governor behaviour

These symptoms do not automatically prove that the injection pump is defective.

Engine behaviour may also be influenced by:

injector nozzles
high-pressure fuel lines
fuel filters
fuel supply
feed pump
governor or actuator
engine-side injection timing
compression
turbocharger
charge-air system
valve train
exhaust system
engine cooling
installation and commissioning

Spare Parts for Historical Marine Engines

Many mechanical marine injection pumps have remained in operation for several decades.

Original components may now be:

regularly available
available only from historical stock
available as new old stock
available only as inspected used parts
suitable for professional reconditioning
or completely obsolete

Depending on the project, our spare-parts strategy may include:

our own available stock
new original components
new-old-stock parts
professionally reconditioned original parts
inspected reference components
complete reference pumps
historical manufacturer documentation
specialised European manufacturing partners
reproduction of obsolete parts

The fact that one component is no longer available through the regular supply chain does not automatically mean that an otherwise repairable marine injection pump must be scrapped.

Every historical component is assessed for:

material condition
dimensional accuracy
corrosion
storage damage
functional suitability
compatibility with the specific pump version

Reverse Engineering of Obsolete Components

Where a technically required component is no longer available, we assess whether reproduction is possible.

Depending on the component, this may include:

sourcing an original or reference part
complete dimensional measurement
material analysis
hardness testing
surface assessment
CAD design
preparation of manufacturing documentation
prototype manufacture
functional testing
one-off production
small-series production
final test-bench verification

Our objective is not merely to reproduce the external appearance of a historical component.

The reproduced component must operate correctly within the complete fuel injection pump.

The decisive factors include:

material
hardness
heat treatment
surface finish
dimensional tolerances
lubrication
load capacity
interaction with the remaining original components

Technical feasibility and economic viability are assessed individually for each project.

Support During Dry-Docking and Planned Maintenance

Marine overhaul projects are frequently linked to:

scheduled dry-docking
shipyard periods
classification work
planned engine overhauls
port stays
charter schedules
spare-parts availability
international transport times
customs procedures
vessel operating schedules

For realistic planning, we require the following information as early as possible:

engine model
injection-pump type
number of pumps
photographs of all identification plates
planned removal date
planned shipping date
required completion date
vessel location
next port
shipyard location
known faults
available pump test sheets
engine acceptance documentation
customs and return-shipping requirements

Binding completion dates can be confirmed only after the technical scope, spare-parts situation and required external processing have been assessed.

Commercial and Civil Shipping

Our services are available to civil and commercial operators including:

merchant shipping
cargo vessels
passenger vessels
ferries
inland-waterway vessels
tugboats
harbour craft
workboats
dredgers
fishing vessels
pilot boats
supply vessels
offshore service vessels
research vessels
survey vessels
civil government vessels
yachts and specialist vessels
shipboard and coastal power-generation installations

Civilian use does not automatically remove the need for sanctions, export-control or end-user checks.

Depending on the transaction, we may verify:

customer
vessel owner
vessel operator
end user
destination country
flag state
port
intended use
involved intermediaries
beneficial ownership
possible sanctions connections

Government and Non-Civilian Naval Applications

Enquiries involving:

naval vessels
navy-operated auxiliary vessels
coastguard vessels
military support vessels
government-operated operational craft
armed authority vessels
naval logistics units
naval training vessels
military maintenance organisations
defence procurement bodies
military end users

are considered only after complete technical, commercial and export-control review.

For these projects, the following must be clearly disclosed:

contracting party
purchasing organisation
vessel owner
vessel operator
actual end user
end-use country
final destination
vessel
engine application
intended use of the pump or component
any intermediary or procurement agent
intended re-export or onward transfer

End User Certificate as a Mandatory Company Requirement

For orders involving non-civilian naval vessels, military organisations or defence-related end users, we require a complete and legally signed:

End User Certificate – EUC

or an equivalent official end-use and end-user declaration before accepting the order.

This requirement forms part of our internal export-control and compliance policy.

Depending on the individual transaction, the EUC must include:

full legal name of the customer
full legal name of the end user
address and country of the end user
responsible authority or military organisation
purchasing or procurement organisation
vessel type
vessel name
vessel identification or registration details where applicable
engine manufacturer and engine model
injection-pump type
Bosch, MWM, Deutz, L’Orange or other part number
exact description of the goods or services
intended use
final destination country
final installation location
confirmation of end use
confirmation of end-user identity
declaration that no unauthorised transfer or re-export will take place
name and position of the authorised signatory
date and signature
official stamp where applicable

We may also require:

official confirmation by a public authority
import authorisation
export authorisation
procurement documentation
vessel-registration documentation
company-registration documentation
proof of beneficial ownership
additional end-use statements
non-re-export declarations
verification through official government contact details

Without sufficient verification of the end user, end use and final destination, an order involving a non-civilian naval vessel or military end user will not be accepted or continued.

An EUC requested by us does not replace any official licence, authorisation or documentation that may additionally be required by the competent authorities.

Sanctions, Embargoes and Export-Control Compliance

Einspritzpumpen Manufaktur NRW observes all sanctions, embargoes, export-control, customs and foreign-trade requirements that are applicable to the individual transaction.

These may include applicable:

German foreign-trade regulations
European Union regulations
United Nations sanctions
EU restrictive measures
arms embargoes
dual-use controls
military-goods controls
person- and entity-based sanctions
financial sanctions
export and transfer restrictions
technical-assistance restrictions
customs requirements
end-use documentation requirements
re-export restrictions

Export-control requirements may depend not only on the physical component, but also on the recipient, destination, end use and technical support provided. EU dual-use controls can apply to listed goods and, under defined conditions, also to certain non-listed goods intended for specific military end uses in embargoed destinations.

Compliance Review Before Order Acceptance

Depending on the project, we may review:

contracting customer
invoice recipient
paying party
shipping party
consignee
end user
beneficial owners
procurement agents
intermediaries
destination country
country of origin
flag state
vessel owner
vessel operator
shipyard
maintenance organisation
port of delivery
intended use
final installation location
goods classification
technical characteristics
possible military end use
intended onward transfer
intended re-export
required licences
sanctions-list results

No Circumvention Through Intermediaries or Third Countries

Orders will be rejected, suspended or terminated where there are indications of:

sanctions or embargo circumvention
concealed end-user identity
unclear ownership or operating structures
false or contradictory information
undisclosed intermediaries
undisclosed routing through third countries
unlicensed military end use
installation on a sanctioned vessel
involvement of listed persons or organisations
missing official authorisations
inadequate end-use documentation
an unexplained change in destination
an unexplained change in vessel or operator
suspected unauthorised re-export

A project already under technical assessment or overhaul may be suspended if new export-control or sanctions concerns arise during processing.

No Automatic Order Acceptance

Submitting photographs, technical documents, components, pumps or an enquiry does not constitute acceptance of an order.

An order is accepted only after:

sufficient technical identification
identification of the contracting customer
identification of the actual end user
verification of the intended use
verification of the destination
review of possible sanctions and embargo restrictions
receipt of required end-use documentation
clarification of necessary licences
commercial agreement
written order confirmation

We reserve the right to reject an enquiry or order where legally permissible, particularly where technical, commercial or compliance-related clarification is insufficient.

Components must not be sent to our workshop before receiving shipping approval.

Customer Responsibilities

The customer must provide complete, accurate and current information.

This includes:

contracting party
actual end user
beneficial owner
destination country
vessel
vessel owner
vessel operator
flag state
intended installation location
intended use
civil, governmental or military use
planned onward transfer
planned re-export
procurement intermediaries
required official licences

Any change involving:

end user
destination country
vessel
vessel operator
intended use
installation location
delivery route
re-export intention

must be reported to us immediately.

Components repaired, overhauled or supplied by us may not be transferred in violation of:

official authorisations
end-user declarations
end-use undertakings
sanctions
embargoes
export-control laws
re-export restrictions

Documentation Required for Civil Marine Applications

For commercial or civil vessel enquiries, please provide:

full company name and address
contact person
company-registration details where requested
vessel type
vessel name
flag state
vessel owner
vessel operator or shipping company
main propulsion, auxiliary-engine or generator application
engine manufacturer
engine model
engine serial number where available
number of cylinders
rated output
rated speed
injection-pump type
Bosch, MWM, Deutz, L’Orange or other part number
photographs of the complete pump
photographs of all identification plates
description of the fault
requested scope of work
destination country
shipyard or installation location
planned dry-docking or installation deadline
available test sheets or engine documentation

Additional Documentation for Government or Non-Civilian Naval Applications

In addition to the technical documentation, we require:

full name of the government authority
full name of the military or naval end user
responsible procurement organisation
vessel identification
end-use description
End User Certificate
official end-use declaration
official end-user declaration
final-destination confirmation
non-re-export undertaking
import authorisation where required
export authorisation where required
contact details for a verifiable public authority
company or authority registration documents
other compliance documentation requested during the review

Incomplete documentation may result in the enquiry being rejected or placed on hold.

International Shipment to Germany

Fuel injection pumps and components may be sent to our workshop in Germany only after prior technical, customs and export-control coordination.

Before shipment, the following must be clarified:

sender
legal owner of the component
contracting customer
end user
country of origin
country of dispatch
final destination country
intended use
customs status
accurate goods description
declared value
reason for shipment
temporary import or repair-return procedure
return-shipping destination
packaging
transport insurance
required licences and documentation

The injection pump must be drained as far as technically possible before shipment.

Open connections must be sealed against:

dirt
moisture
corrosion
foreign particles
transport contamination

The pump must be packed in a stable and transport-resistant container.

Unapproved shipments may be rejected, returned or held pending clarification. Costs resulting from incomplete shipping or customs documentation may be charged to the sender where legally permissible.

Frequently Asked Questions

Do you overhaul injection pumps for marine propulsion engines?

Yes.

We work on mechanical fuel injection pumps for main propulsion engines, auxiliary engines, shipboard generators and other marine diesel applications.

Technical feasibility depends on pump type, condition, available spare parts and available calibration data.

Can pumps be sent from another country?

Yes, subject to prior technical, customs and, where applicable, export-control approval.

Do not ship a pump before receiving confirmation of the delivery procedure.

Do you work on injection pumps for naval vessels?

Such work may be considered only after complete case-by-case review.

For non-civilian naval vessels, military organisations and defence-related end users, we require an End User Certificate or equivalent official documentation before accepting the order.

Is an End User Certificate legally required for every order?

No single documentation requirement applies automatically to every civil repair or spare-parts transaction.

However, as part of our internal compliance policy, we require an EUC for non-civilian naval vessels and military end users. Authorities may require additional end-use documents or licences depending on the goods, service, destination, end user and intended use.

Does an EUC replace an export licence?

No.

An End User Certificate documents the declared end user, final destination and intended use. It does not replace any export, transfer, import or other official authorisation required by the competent authorities.

Can you test two fuel injection pumps from a V16 engine together?

Yes, where the pump configuration can be installed on our test equipment and suitable technical calibration data is available.

For a complete assessment, both pumps should be supplied together.

Can you reproduce obsolete spare parts?

Depending on component geometry, material, tolerances, operating load and technical feasibility, professional reconditioning or reproduction may be possible.

Each component is assessed individually.

Do you accept work connected with sanctioned countries, vessels or companies?

No order will be accepted where it would violate applicable sanctions, embargoes, export prohibitions or licensing requirements.

We also reject orders where the actual end user, intended use or final destination cannot be sufficiently verified.

Can a civil vessel still require an export-control review?

Yes.

The vessel’s civil designation alone does not automatically exclude sanctions, end-user, destination or export-control considerations.

Can you provide urgent support during a vessel’s shipyard period?

We can assess urgent projects, but the possible completion date depends on:

pump condition
necessary disassembly
spare-parts availability
external processing
available technical data
customs procedures
compliance approval

The earliest technically realistic date can be confirmed only after reviewing the complete enquiry.

Request a Technical Assessment for a Marine Fuel Injection Pump

Do you require inspection, complete overhaul or test-bench calibration of a mechanical fuel injection pump for a:

Main propulsion engine

Marine auxiliary engine

Shipboard generator

Emergency generator

Workboat

Government vessel

or a permitted naval application following compliance approval?

Please send us:

complete company details
vessel type
vessel name
vessel owner and operator
flag state
engine manufacturer and model
engine serial number where available
pump type and part number
photographs of all identification plates
photographs of the complete pump
description of the fault
country of destination
final end user
civil, governmental or naval use
required completion date
available technical documentation

For non-civilian naval vessels or military end users, an End User Certificate is required before order acceptance.

After reviewing the technical, commercial and compliance requirements, we will advise whether and under which conditions the project can be accepted.

Einspritzpumpen Manufaktur NRW

Specialist in Mechanical Marine Fuel Injection Systems

Our services include:

Marine fuel injection pump repair

Ship engine injection pump overhaul

Marine diesel injection pump calibration

Bosch inline injection pump overhaul

L’Orange fuel injection pump inspection

Bosch P9 and P10 calibration

RP21, RP21C and RP25 pump overhaul

V16 injection pump pair testing

16-cylinder test-bench calibration

Complete technical condition assessment

Complete disassembly and precision measurement

Historical spare-parts support

Reverse engineering

Reproduction of obsolete injection-pump components

International project support

End-user and end-use verification

Export-control and sanctions compliance review

From an individual mechanical fuel injection pump to a complete V16 tandem pump system, we support shipowners, shipyards, marine service companies, engine rebuilders and legally permitted government operators with specialised overhaul and test-bench capability from Germany.

Based in North Rhine-Westphalia, Germany – supporting customers throughout Europe and worldwide.

Fuel injection pumps and individual components can be sent to our workshop by prior arrangement and only after technical and compliance approval.

Recommended Button Text

Request a Marine Injection Pump Assessment

Alternative:

Submit a Marine Fuel Injection Pump Enquiry

For naval and government applications:

Submit End-User and Technical Documentation