ISO 7299-1:2024

Overview

ISO 7299-1:2024 - Diesel engines - End-mounting flanges for pumps - Part 1: Fuel injection pumps specifies dimensional requirements for end-mounting flanges used to attach fuel injection pumps (rotary, distributor and in-line) to diesel (compression-ignition) engines. The second edition updates the series and adds a new flange geometry (Type 7). The standard provides standardized flange geometries, hole patterns and dimensional tolerances to ensure interchangeability and reliable pump-to-engine mounting.

Key topics and requirements

• Scope: Dimensional requirements for nine types of end-mounting flanges (Types 1–9) for fuel injection pumps.
• Flange types: Defined geometries and dimensions for Types 1 through 9 (figures and tables give values in millimetres).
• Tolerances: Recommended tolerance H8 for the engine mounting bore inner diameter; pump spigot tolerance g8 (may be replaced by f7 if functionally necessary). H8 can be substituted by H7 by supplier/engine-manufacturer agreement.
• Reference dimensions: Diameter d corresponds to ISO 6519 (tapers for shaft ends and hubs).
• Installation notes: Flange configuration can be rotated relative to pump housing; Type 8 includes recommended stud angles (40° above and 20° below horizontal) for fixed-pump mounting.
• Technical drawings: Each flange type is accompanied by illustrative figures and tables (dimensions, nominal and tolerances).

Applications and users

Who uses ISO 7299-1:2024:

• Engine manufacturers and OEMs specifying engine-side mounting bores and stud configurations.
• Fuel injection pump manufacturers (rotary, distributor and in-line) designing end-mounting flanges to meet interchangeability.
• Powertrain and propulsion system designers ensuring compatible pump-to-engine interfaces.
• Aftermarket and service organizations performing pump replacements or retrofits. Practical applications:
• Standardized mounting for fuel injection pumps in diesel road vehicles and stationary diesel engines.
• Simplified supply-chain compatibility between engines and pump suppliers.
• Reduced design iterations and faster integration during engine development or pump replacement.

Related standards

• ISO 6519 - Diesel engines - Fuel injection pumps - Tapers for shaft ends and hubs (referenced for diameter d).
• Other parts of the ISO 7299 series cover additional pump types and mounting arrangements.

ISO 7299-1:2024 is essential for ensuring mechanical compatibility and interchangeability of fuel injection pumps and contributes to reliable, serviceable diesel engine assemblies. Keywords: ISO 7299-1:2024, diesel engines, end-mounting flanges, fuel injection pumps, flange dimensions, H8 tolerance, g8/f7, ISO 6519.