1. Customer Background

A European construction equipment maintenance customer provides diesel engine servicing and injector repair support for local machinery operators. Its daily business involves maintaining equipment used in construction projects, material handling, and other demanding working environments.

As part of its regular maintenance work, the workshop frequently handles common rail injectors fitted to JCB machinery. One of its recurring repair requirements involved the 28580673 injector used in JCB 3L SEF Stage V applications.

The customer needed a suitable repair solution for injectors showing signs of wear after extended operation. Rather than replacing the complete injector assembly whenever a repair was possible, the workshop preferred to inspect the internal components and replace the necessary parts.

2. Repair Challenges

During injector inspections, the technicians found that some units required attention to both the nozzle assembly and the internal control valve.

The nozzle is responsible for delivering and atomizing fuel into the combustion chamber, while the control valve regulates the internal fuel control process within the injector. Both components play important roles in injector operation.

When these components show wear or no longer meet the required testing conditions, the injector may experience irregular fuel delivery, unstable engine operation, or difficulties maintaining consistent performance.

For the workshop, identifying individual replacement components was only part of the challenge. The replacement parts also needed to match the injector reference and work together as a suitable repair combination.

Managing separate component purchases could make inventory preparation and repair scheduling more complicated, particularly when several JCB machines required maintenance within a limited period.

3. Our Solution:

7135-910 Common Rail Injector Repair Kit After discussing the injector reference and repair requirements with our team, the customer selected our 7135-910 Common Rail Injector Repair Kit for the 28580673 injector application. ​  The kit includes two important components: ​  •  L551NHR Nozzle (28589956): The replacement nozzle is designed for the corresponding injector application and supports the fuel injection and atomization process. ​   •  28606836 Control Valve: This internal component is responsible for controlling the fuel flow process within the common rail injector. ​    The combination provides a practical replacement solution for injector overhaul work. Instead of sourcing the nozzle and control valve separately, the customer could obtain the corresponding components under one repair kit reference. ​  Before shipment, the product reference and component combination were checked against the customer's requirements to help ensure application compatibility.

4. Application Results

After receiving the 7135-910 kits, the customer's technicians carried out the injector disassembly, cleaning, component replacement, and subsequent testing according to their workshop procedures.

The replacement of the nozzle and control valve provided a more complete repair approach for the injectors requiring attention to these internal components.

Following the repair and testing process, the serviced injectors showed improved operating conditions. Fuel delivery performance became more consistent on the repaired units, helping reduce the operational difficulties previously experienced by the customer.

The workshop also benefited from a more organized parts preparation process. Having the nozzle and control valve available together reduced the need to coordinate separate component purchases and made it easier to prepare repair materials for scheduled maintenance work.

For equipment operators, properly serviced injectors help maintain normal engine operation and support the daily demands of construction machinery. For the repair workshop, having a suitable repair kit also provides an additional option for handling injector maintenance without automatically replacing the complete assembly.

5. Continued Maintenance Support

The European customer incorporated the 7135-910 repair kit into its maintenance parts selection for applicable JCB injector repairs.

For this application, the key consideration was matching the complete repair kit to the correct injector reference rather than selecting individual components based only on appearance or general engine information.

Our 7135-910 Injector Repair Kit, featuring the L551NHR nozzle and 28606836 control valve, provided the customer with a corresponding replacement solution for the 28580673 common rail injector.

The repair experience helped address a recurring injector maintenance requirement and gave the workshop a more convenient way to manage component-level repairs for JCB 3L SEF Stage V equipment.