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17H1131 is a replacement diaphragm for the Simms fuel injection pump fitted to BMC 2.6 litre diesel engines. Manufactured to replace the original diaphragm, it is supplied complete with the steel boss, which is essential for the correct operation of the injection pump.
This diaphragm is fitted to Simms injection pump SPE3A75S621.
This diaphragm must be fitted together with the supplied steel boss. If the diaphragm is installed without the steel boss, the injection pump will not operate correctly and the engine will not run correctly. Always ensure the boss is transferred or fitted during assembly.
The diaphragm forms an important part of the Simms fuel injection pump governor assembly, helping to regulate fuel delivery in response to engine operating conditions. Over time, the original diaphragm can become brittle, split or deteriorate, resulting in poor engine performance and incorrect governor operation.
When replacing the diaphragm, carefully inspect the surrounding pump components for wear or contamination before reassembly. As this component is supplied with the correct steel boss, it is important that both parts are fitted together to ensure the diaphragm operates as intended.
Before ordering, confirm that your tractor is fitted with Simms injection pump SPE3A75S621, as different injection pumps and diaphragm assemblies were used on other BMC engine applications.
Ideal for customers searching for 17H1131 diaphragm, Simms injection pump diaphragm, SPE3A75S621 diaphragm, BMC 2.6 injection pump parts, Nuffield 3DL injection pump diaphragm, Universal Three Simms pump parts and replacement Simms fuel injection pump components.
We specialise in replacement parts for classic Nuffield, Leyland and Marshall tractors and stock a wide range of components for Simms and CAV fuel injection equipment.
Original equipment manufacturers names and parts numbers are quoted for reference purposes only and are not intended to suggest that our replacement parts are made by the original equipment manufacturer.
Product images are for illustrative purposes only and may not always be an exact representation of the product.
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