Bosch Fuel Injection Pump Repair, Overhaul and Calibration

Independent Specialist Workshop for Mechanical Bosch Fuel Injection Pumps

Einspritzpumpen Manufaktur NRW is an independent specialist workshop in Germany providing professional Bosch fuel injection pump repair, overhaul, rebuilding, testing and calibration.

We specialise in mechanical Bosch inline fuel injection pumps used in classic vehicles, commercial vehicles, industrial engines, marine propulsion systems, generator sets and stationary large diesel engines.

Our workshop services include Bosch fuel injection pumps from the following series:

Bosch M · Bosch A · Bosch MW · Bosch P · Bosch P9 · Bosch P10 · Bosch PF1 · Bosch ZWM

Every fuel injection pump is individually identified, completely dismantled, cleaned, measured, technically evaluated and calibrated on the appropriate test bench.

Our objective is not simply to replace seals. We restore the complete mechanical and hydraulic function of the injection pump and accurately match its fuel delivery to the relevant engine specification.

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

Request a Bosch Fuel Injection Pump Assessment

Please send us photographs of the complete injection pump, its nameplate, the Bosch type designation and all visible part numbers.

Request a Technical Assessment

View Our Fuel Injection Pump Services

Professional Bosch Fuel Injection Pump Repair

A mechanical diesel injection pump is a precision assembly. Its condition directly affects fuel delivery, engine performance, starting behaviour, combustion quality, exhaust temperature, fuel consumption and operational reliability.

A professional Bosch injection pump overhaul therefore requires considerably more than replacing external gaskets or seals.

Depending on the pump type and technical condition, our work includes:

technical identification of the injection pump
initial functional assessment
complete dismantling
industrial cleaning of all components
precision measurement of mechanical parts
inspection of the camshaft and bearings
inspection of plunger and barrel assemblies
inspection of delivery valves
inspection of the control rack and control sleeves
inspection of the governor system
replacement or reproduction of worn components
professional reassembly
basic mechanical adjustment
test-bench calibration
adjustment of individual cylinder fuel delivery
governor calibration
leakage and shut-off testing
final functional verification

Each injection pump is assessed according to its Bosch type designation, Bosch part number, engine application and available technical specifications.

Bosch Fuel Injection Pump Types We Overhaul

Bosch M Injection Pumps

Bosch M inline fuel injection pumps are widely used in Mercedes-Benz diesel engines and numerous other automotive and industrial applications.

We overhaul, repair and calibrate mechanical Bosch M pumps for standard engine restoration as well as individually specified engine configurations.

Bosch A and MW Injection Pumps

Bosch A and Bosch MW pumps are used in a wide range of commercial vehicles, agricultural machinery, industrial equipment and diesel engines.

The exact pump configuration is determined from the complete Bosch designation and the information on the nameplate.

Bosch P Injection Pumps

Bosch P inline injection pumps are used in performance-oriented vehicle applications, commercial vehicles and industrial diesel engines.

We provide standard overhaul services as well as application-specific calibration where the technical requirements and suitable test data are available.

Bosch P9 and P10 Injection Pumps

Bosch P9 and Bosch P10 inline fuel injection pumps are among our principal areas of expertise.

These large mechanical injection pumps are used in medium-speed and heavy-duty diesel engines manufactured by companies including:

MWM · Deutz · MTU · MAN · Cummins · Wärtsilä

Typical applications include:

marine propulsion engines
industrial diesel engines
stationary power units
generator sets
emergency power systems
railway applications
mining equipment
large special-purpose machinery

We inspect, rebuild and calibrate individual P9 and P10 pumps as well as complete tandem injection-pump assemblies.

Bosch PF1 and ZWM Systems

We also support selected Bosch PF1 individual-pump systems and Bosch ZWM injection systems.

A technical assessment is carried out using the complete part number, pump designation, engine application and photographs of the existing components.

Bosch EPS Test-Bench Calibration

Precision Adjustment Following Every Overhaul

After mechanical rebuilding, the injection pump is tested and calibrated on the appropriate Bosch EPS fuel injection pump test bench.

Depending on the pump design and available technical specifications, calibration may include:

fuel delivery measurement for every cylinder
comparison of individual cylinder delivery quantities
low-speed delivery adjustment
full-load delivery adjustment
governor function testing
idle-speed calibration
shut-off function testing
leakage testing
verification of smooth control-rack movement
verification of repeatable delivery values

The final calibration is carried out according to the documented engine specification or an agreed customer-specific configuration.

An injection pump leaves our workshop only after its mechanical function and fuel delivery have been verified.

Dedicated 16-Cylinder Injection-Pump Test Bench

Testing Large P9 and P10 Tandem Pump Assemblies

One of our principal technical capabilities is a specially designed 16-cylinder fuel injection pump test bench.

The system was developed for the testing and calibration of large Bosch inline fuel injection pumps and complete tandem pump assemblies used on V16 diesel engines.

Its design includes:

an extended pump bed
a high-capacity drive system
increased rotating mass
mounting capability for large injection pumps
testing of complete tandem assemblies
precise synchronisation of two mechanically coupled injection pumps

This allows both pump sections of a tandem system to be evaluated together following individual overhaul and calibration.

Correct tandem synchronisation is essential for uniform fuel delivery, balanced cylinder performance and reliable operation of large diesel engines.

Typical applications include large injection systems for:

MWM and Deutz engines
MTU engines
marine propulsion engines
industrial V12 and V16 engines
stationary generating units
power-generation installations

Our Bosch Fuel Injection Pump Overhaul Process

1. Pump Identification

Before dismantling, we record all available identification details, including:

Bosch pump type
Bosch part number
engine manufacturer
engine model
number of cylinders
direction of rotation
governor type
application
rated engine output
rated engine speed

The complete nameplate information is important because visually similar injection pumps may contain different internal components or calibration specifications.

2. Initial Inspection

The injection pump is inspected for visible damage, corrosion, leakage, seized components, damaged control mechanisms and signs of previous repair work.

Where technically possible, an initial functional test is performed before dismantling.

3. Complete Dismantling and Cleaning

The pump is completely dismantled into its individual components.

All parts are cleaned using suitable industrial cleaning processes. Deposits, corrosion and contamination must be removed before reliable measurement and inspection can take place.

4. Precision Measurement

Critical components are measured and evaluated individually.

These may include:

pump elements
plunger and barrel assemblies
delivery valves
camshaft
cam followers
bearings and bushes
control sleeves
control rack
shafts and levers
governor components
springs
sealing surfaces

Components are reused only when their technical condition permits reliable continued operation.

5. Replacement or Reproduction of Components

Worn or damaged components are replaced wherever suitable spare parts are available.

Where original parts are no longer commercially available, we assess whether the component can be reproduced through reverse engineering and precision manufacturing.

6. Reassembly

The fuel injection pump is reassembled with the required new wear components, seals and gaskets.

During assembly, all mechanical clearances, control mechanisms and basic settings are carefully checked.

7. Test-Bench Calibration

The completed injection pump is calibrated on the appropriate test equipment.

Fuel delivery, governor behaviour, shut-off function, leakage and repeatability are verified before final approval.

Reverse Engineering for Obsolete Bosch Components

Many mechanical Bosch injection pumps remain fundamentally rebuildable even though original replacement parts have been discontinued.

This particularly affects historical industrial, marine and large-engine injection systems.

Where technically and economically feasible, we can reproduce obsolete components through a controlled reverse-engineering process.

This may include:

dimensional inspection of the original component
measurement of functional surfaces
material assessment
reconstruction of the component geometry
CAD modelling
preparation of manufacturing drawings
prototype production
dimensional inspection
functional testing
European small-series manufacturing

Reverse engineering allows us to repair injection pumps that could otherwise no longer be restored because of unavailable spare parts.

A selection of frequently required replacement components is held in stock to reduce the turnaround time of suitable repairs.

Bosch Injection Pumps for Automotive Diesel Engines

We repair and overhaul mechanical Bosch fuel injection pumps used in classic diesel vehicles, commercial vehicles, off-road vehicles and specialist conversions.

Our experience includes injection systems for Mercedes-Benz diesel engines from several generations, including mechanical inline pumps used with engines from the OM series.

Depending on the application, we can provide:

restoration to documented standard specifications
calibration for a rebuilt engine
calibration for increased engine displacement
adjustment for a modified turbocharger configuration
application-specific governor settings
individually agreed fuel-delivery characteristics

Every modification must be matched to the engine, turbocharger, intended operating range and mechanical load capacity.

Fuel Injection Systems for Industrial and Marine Engines

Mechanical Bosch injection systems remain in service in numerous industrial and marine applications throughout the world.

They are used in engines operating under demanding conditions where reliability, repairability and accurate fuel delivery are essential.

We support injection systems used in:

marine propulsion
auxiliary marine engines
industrial machinery
generator sets
emergency power systems
stationary diesel installations
railway engines
mining equipment
heavy-duty specialist machinery

Our service includes the injection pump itself as well as the technical assessment of related mechanical injection components.

For selected applications, we also inspect and overhaul nozzle holders and injector assemblies.

Why Choose Einspritzpumpen Manufaktur NRW?

Specialised Knowledge Instead of Standardised Exchange Repair

Every mechanical Bosch fuel injection pump has a specific configuration. Differences can include the number of cylinders, direction of rotation, pump elements, camshaft, governor, fuel-delivery specification and engine application.

We therefore do not treat every pump as an identical exchange unit.

Our work is based on:

individual technical identification
complete dismantling
precision measurement
component-level inspection
experienced mechanical assessment
Bosch EPS test equipment
specialist knowledge of large P9 and P10 pumps
a dedicated 16-cylinder test bench
engine and combustion-system knowledge
reverse engineering of obsolete parts
application-specific final calibration

The combination of injection-pump rebuilding, engine rebuilding, precision machining and component manufacturing allows us to evaluate the fuel injection system as part of the complete engine.

International Bosch Fuel Injection Pump Service

Einspritzpumpen Manufaktur NRW is based in North Rhine-Westphalia, Germany.

We receive technical enquiries from customers, engine operators, shipping companies, power-generation businesses, industrial companies and specialist workshops throughout Europe and worldwide.

Fuel injection pumps and individual components can be sent to our workshop by prior arrangement.

Before shipping, please contact us and provide the available technical information. This allows us to determine whether the pump can be accepted and which documentation is required.

Request a Bosch Fuel Injection Pump Repair

For an initial assessment, please provide:

photographs of the complete injection pump
a clear photograph of the nameplate
the complete Bosch type designation
the Bosch part number
engine manufacturer
exact engine designation
number of cylinders
engine output
rated engine speed
vehicle, marine or industrial application
description of the fault
information about previous repairs
required standard or modified calibration

Please do not remove the nameplate or dismantle the injection pump before contacting us.

The more complete the information, the more accurately we can identify the pump and assess the required work.

Send Us Your Enquiry

Name

Company

Country

Email Address

Telephone Number

Engine Manufacturer and Model

Bosch Pump Type or Part Number

Description of the Fault

Upload Photographs

Submit Technical Enquiry

Frequently Asked Questions

Do you repair Bosch diesel injection pumps?

Yes. We specialise in the repair, overhaul, rebuilding, testing and calibration of mechanical Bosch fuel injection pumps.

Our main focus is on Bosch inline injection pumps rather than modern common-rail systems.

Which Bosch fuel injection pump types do you service?

Our services include many pumps from the Bosch M, A, MW, P, P9, P10, PF1 and ZWM series.

The exact repair capability depends on the pump configuration, condition and availability or reproducibility of the required components.

Is a fuel injection pump repair the same as replacing the seals?

No. Replacing seals only addresses external leakage.

A complete overhaul includes dismantling, cleaning, measurement, inspection of the internal components, replacement of worn parts, reassembly and test-bench calibration.

Can you overhaul a Bosch injection pump when spare parts are no longer available?

In many cases, yes.

Where original components have been discontinued, we investigate whether suitable parts are available from stock or whether reproduction through reverse engineering is technically feasible.

Do you calibrate every rebuilt injection pump?

Yes. A mechanically rebuilt injection pump must be calibrated and functionally tested on suitable test equipment before it can be returned to service.

Can you test Bosch P9 and P10 pumps?

Yes. Bosch P9 and P10 inline injection pumps are among our primary areas of expertise.

We also have dedicated equipment for testing and synchronising large tandem injection-pump assemblies.

Can international customers send an injection pump to Germany?

Yes, by prior arrangement.

Please send photographs and identification details before shipping so that we can assess the pump and provide the appropriate shipping information.

What information do you need for a quotation?

We primarily need the complete Bosch pump type, Bosch part number, engine designation, application, photographs of the pump and a description of the fault.

A final repair quotation may require dismantling and technical inspection of the pump.

Einspritzpumpen Manufaktur NRW

Your Specialist for Mechanical Bosch Fuel Injection Pumps

Bosch Fuel Injection Pump Repair

Bosch Fuel Injection Pump Overhaul

Bosch Fuel Injection Pump Calibration

Bosch P9 and P10 Specialists

16-Cylinder Injection-Pump Test Bench

Reverse Engineering of Obsolete Components

Diesel Engine Rebuilding and Precision Machining

Contact our workshop for a technical assessment of your Bosch fuel injection pump.

Request a Repair Assessment